EPA-420-R-86-102
ANALYSIS OF THE 1982
TRUCK INVENTORY AND USE SURVEY
Final Report
Prepared for:
U.S. ENVIRONMENTAL PROTECTION AGENCY
Motor Vehicle Emission Laboratory
Ann Arbor, Michigan
Contract No. 68-03-1865, Work Assignment No. 23
Prepared by.
ENERGY AND ENVIRONMENTAL ANALYSIS, INC.
1655 North Fort Myer Drive, Suite 600
Arlington, Virginia 22209
December 1986
-------
TABLE OF CONTENTS
Page
1. INTRODUCTION 1-1
2. METHODOLOGY . . . . 2-1
2.1 Overview . .... 2-1
2.2 Data Screening . 2-1
2.3 Calculation of Average Annual Miles Per Vehicle,
Fuel Economy and Stocks 2-13
2.4 Other Considerations 2-16
3. RESULTS
3.1 Introduction ... 3-1
3.2 Registration Fractions by Vintage 3-3
3 3 Average Annual Mileage Accumulation Rates by Vintage ... 3-9
3.4 Average Fuel Economy By Model Year 3-25
3.5 Total Vehicle Counts 3-44
3.6 Trucks by Area of Operation 3-48
3.7 Comparison with the 1977 TIUS . 3-52
REFERENCES R-l
APPENDIX A - 1982 Truck Inventory and Use Survey
Detailed Tables A-l
APPENDIX B - Analysis of Data on Trucks Over B-l
10 Years of Age (To Be Included)
-------
LIST OF TABLES
Page
2-1 Summary of Selected Truck Characteristics From the TIUS . . . 2-2
2-2 Rules for Classifying TIUS Records
into EEA_GVW/Fuel Type Categories 2-5
2-3 Frequency Distributions of 1982 TIUS Data . 2-6
2-4 Frequency Distributions of 1982 TIUS Data 2-7
2-5 Frequency Distributions of 1982 TIUS Data 2-8
2-6 Frequency Distributions of 1982 TIUS Data 2-9
2-7 Criteria for Excluding TIUS Records . 2-11
2-8 Summary of Excluded Records .. 2-14
2-9 Off Highway Vehicle Frequency Counts by GVW Class 2-17
3-1 Truck Nomenclature ... 3-2
3-2 1982 TIUS Comparison of Registration Fractions
by Vintage by GVW Category 3-4
3-3 Comparison of Registration Fractions by Vintage 3-5
3-4 1982 TIUS Comparison of Average Annual Miles
Per Truck by Vintage by GVW Category 3-11
3-5 Comparison of Average Annual Miles Per Truck By Vintage .. . 3-13
3-5a 1982 TIUS Analysis Annual VMT/Vehicle by Age for
Gasoline Trucks 3-22
3-5b 1982 TIUS Analysis Annual VMT/Vehicle by Age for
Diesel Trucks ... 3-23
3-6 1982 TIUS Comparison of Average Fuel Economy
by Model Year by GVW Category .. 3-26
3-7 1982 TIUS Comparison of Average Fuel Economy
by Model Year by GVW Category .... 3-27
3-7a 1982 TIUS Analysis Fuel Economy by Vintage . . 3-45
3-7b 1982 TIUS Analysis Fuel Economy by Vintage 3-46
3-7c M3FC Road MPG and Diesel Advantage Factors ... 3-47
-------
LIST OF TABLES
(CONTINUED)
Page
3-8 1982 TIUS - Stock, VMT, and MPG Analysis
by GVW and Fuel Type 3-49
3-9 1982 TIUS - Stock, VMT and MPG Analysis
by GVW and Area of Operation - Gasoline 3-50
3-10 1982 TIUS - Stock, VMT and MPG Analysis
by GVW and Area of Operation - Diesel 3-51
3-11 Trucks by Area of Operation, GVW Class and Survey Year .... 3-54
3-12 Diesel Penetration Rates
by Area of Operation and Survey Year 3-55
3-13 Average Annual Miles Per Truck
by Weight Category, Fuel Type and Survey Year 3-57
3-14 Average Fuel Economy of Trucks In-Use
by GVW Class, Fuel Type and Survey Year 3-58
-------
LIST OF FIGURES
Page
2-1 Distribution of TIU_GVW By RL Polk Weight Class 2-3
2-2 Annual Miles by Truck Weight Class and Fuel Type 2-12
3-1 Registration Fractions by Vintage
All Light Duty Trucks 3-6
3-2 Registration Fractions by Vintage
All Heavy Duty Gas Vehicles 3-7
3-3 Registration Fractions by Vintage
All*Heavy Duty Diesel Vehicles 3-8
3-4 Annual Mileage Accumulation Rates - Gasoline LDTl's 3-14
3-5 Annual Mileage Accumulation Rates - Gasoline LDT2's 3-15
3-6 Annual Mileage Accumulation Rates - Gasoline HDGV's 3-16
3-7 Annual Mileage Accumulation Rates - Diesel LDT's 3-17
3-8 Annual Mileage Accumulation Rates - Diesel LHDV's 3-18
3-9 Annual Mileage Accumulation Rates - Diesel MUD 's 3-19
3-10 Annual Mileage Accumulation Rates - Diesel HHDV's 3-20
3-11 Average Fuel Economy by Model Year -
Gasoline (0-6,000 lbs GVW) ..3-28
3-12 Average Fuel Economy by Model Year -
Diesel (0-6,000 lbs GVW) 3-29
3-13 Average Fuel Economy by Model Year -
Gasoline (6,001-10,000 lbs GVW) 3-30
3-14 Average Fuel Economy by Model Year -
Diesel (6,001-10,000 lbs GVW) 3-31
3-15 Average Fuel Economy by Model Year -
Gasoline (10,001-19,500 lbs GVW) ... 3-32
3-16 Average Fuel Economy by Model Year -
Diesel (10,001-19,500 lbs GVW) 3-33
3-17 Average Fuel Economy by Model Year -
Gasoline (19,501-26,000 lbs GVW) 3-34
-------
LIST OF FIGURES
(CONTINUED)
Page
3-18 Average Fuel Economy by Model Year -
Diesel (19,501-26,000 lbs GVW) 3-35
3-19 Average Fuel Economy by Model Year -
Gasoline (26,001-33,000 lbs GVW) 3-36
3-20 Average Fuel Economy by Model Year -
Diesel (26,001-33,000 lbs GVW) 3-37
3-21 Average Fuel Economy by Model Year -
Gasoline (33,001-50,000 lbs GVW) 3-38
3-22 Average Fuel Economy by Model Year -
Diesel (33,001-50,000 lbs GVW) 3-39
3-23 Average Fuel Economy by Model Year -
Gasoline (50,001+ lbs GVW) 3-40
3-24 Average Fuel Economy by Model Year -
Diesel (50,001+ lbs GVW) 3-41
-------
1. INTRODUCTION
Between 1977 and 1985, the number of trucks in operation grew at an
annual rate of 5 2 percent per year while the number of cars in-use grew
by only 1 7 percent annually Over the same time period, the penetra-
tion of diesel engines in heavy truck categories such as the 19,500-
26,000 lb class soared from 5 0 percent to 12.1 percent.2.3/ Ancj t^e
average on-road fuel economy of new trucks jumped from 10.6 mpg in 1977
to 14.5 mpg. in 1985 in response to both Congressionally-mandated fuel
economy standards, fuel price incentives, and federal programs such as
the Voluntary Truck and Bus Fuel Economy Program
In order to monitor trends in the current and future emissions inven-
tories and fuel consumption levels attributable to trucks, the Environ-
mental Protection Agency (EPA) has developed two models: the Mobile
Source Emissions Inventory (M0BILE3) Model and the M0BILE3 Fuel Consump-
tion (M3FC) Model. The accuracy of the outputs of these two models
depends heavily on the accuracy of the input data used to characterize
the truck fleet. These inputs specifically include: annual mileage
accumulation rates by vintage, vehicle registration distributions by
vintage, diesel penetration rates, fuel economies by vehicle type
and model year, and total vehicle counts by class
The M0BILE3 and M3FC models currently rely on truck fleet character-
ization data from the 1977 Truck Inventory and Use Survey (TIUS) which
was the most recent information available at the time in which they were
developed. However, with the recent preparation and distribution of the
1982 TIUS, it has become possible to update much of the fleet charac-
terization data used in the M0BILE3 and M3FC models. The purpose of this
1-1
-------
report is to present the results of an analysis of the 1982 TIUS
Specifically, the following data elements from the 1982 TIUS are tabu-
lated and compared with the current M0BILE3/M3FC model inputs
• Annual miles per truck by vintage, fuel type and GVW class
• Fuel economy by model year, fuel type and GVW class.
• Trucks in use by vintage, fuel type and GVW class
• Total trucks in use by fuel type, GVW class and area of
operation.
In order to estimate total truck emissions and/or total truck fuel use
in any given calendar year, the EPA models require information on fuel
economy, annual miles, and registration for at least the 20 preceding
vintages represented in the fleet. These data were readily obtained
using the 1977 TIUS public use computer tape. However, in preparing the
1982 TIUS public use computer tape, the Bureau of the Census aggregated
all of the data on trucks over ten years of age. The Bureau of the
Census argued that this step was necessary in view of the relatively
small number of sampled trucks over ten years of age and the need to
protect the confidentiality of respondents to the Survey While the
Census Bureau refused to issue Energy and Environmental Analysis, Inc
(EEA), a tape with fully disaggregated data, they nevertheless did agree
to perform a parallel analysis of the data on trucks over ten years old
using some of the criteria supplied by us. The results of their effort
are submitted as Appendix B to this report
Section 2 presents the methodology and criteria used to "clean" the 1982
TIUS data base Estimates of annual miles per truck and fuel economy by
weight category, fuel type and vintage in 1982 are presented in Section
3 Section 3 also details total truck counts by weight category, fuel
type and area of operation in 1982 and compares the results with those
currently used in the M0BILE3 and M3FC models. Appendix A presents
detailed tables of trucks in use, fuel economy, average annual miles per
1-2
-------
vehicle registration fractions, and associated standard errors, by
«eight category and fuel type.
1-3
-------
2. METHODOLOGY
2.1 OVERVIEW
The Truck Inventory Use Survey (TIUS) provides data on the physical and
operational characteristics of the U.S. truck population. It is one
part of the Census of Transportation which is performed every five years
by the U.S. Bureau of the Census. The latest survey is based on a
stratified probability sample of about 120,000 trucks drawn from a
universe of 33,835,000 registered vehicles in operation in 1982. Govern-
ment-owned vehicles, ambulances, buses, motor-homes and non-registered
off-road trucks are excluded from the survey.
2.2 DATA SCREENING
Of the total sample of 120,000 trucks, usable information was received
from survey respondents on 84,334 vehicles. The information covered a
range of physical and operating characteristics of trucks. Table 2-1
lists the pertinent variables which "were of interest in this study. The
public use computer tape reported information on two alternative gross
vehicle weight (GVW) variables: average GVW and R.L. Polk GVWR The
"average GVW is defined as the empty weight of the vehicle plus the
actual average load carried during the 12 months prior to the Survey
The R.L. Polk GVWR (gross vehicle weight rating) is the empty vehicle
weight plus the recommended load capacity assigned by the manufacturer to
a truck as it leaves the factory. Analyses of the distributions of
trucks by average GVW versus Polk GVWR in the TIUS showed substantial
overlay between weight categories. (See, for example, Figure 2-1 which
shows a wide spread in the distribution of reported average weights for
gasoline trucks listed in the R L. Polk GVWR category of 19,501-26,000
lbs.) These discrepancies were further accentuated when the TIUS data on
truck GVW were cross-tabulated with engine size. For example, EEA found
2-1
-------
TABLE 2-1
summary of selected truck characteristics from the tius
Physical or Operational Para
Vehicle Weight Category
Area of Operation
Ki
i
to
Annual Miles
Miles Per Gallon
Engine Fuel Type
Year Model
Sample Type
State oi Registration
Description
0- 6,000 lbs GVW -- 6,001-10,000 lbs GVW
10,001-lf»,000 lbs GV\J -- 14,001-16,000 lbs GVW
16,001-18,500 lbs GVW -- 18,501-26,000 lbs GVW
26,001-33,000 lbs GVW -- 33,001-50,000 lbs GVW
50,001+ lbs GVW
Local: Mostly local area (in and around city/suburbs or
within a short distance of where vehicle is stationed).
Short-range: Not usually more than 200 miles one way to che
most distant stop from the place the vehicle is stationed.
Intercity. Mostly over the road trips that are usually more
than 200 miles one way to the most distant stop from the
place the vehicle is stationed.
Off-road: Operations as are usually associated with con-
struction and farming.
Estimated by respondent for year of Survey (1982)
Estimated by respondent
Gasoline, diesel, lpg, and other
Model year 1973 and earlier through model year 1983
Pickups, Vans, Single unit trucks <26,000 lbs GVW
Single unit trucks >26,000 lbs GVW, Tractor-trailers
Expansion Factor
(to un l ve r st- I e vc ! )
Varies by sc.ilc- of registration and sample type
-------
FIGURE 2-1
DISTRIBUTION OF TIU_GVW BY RL POLK WEIGHT CLASS
FOR ALL GASOLINE-FUELED TRUCKS IN THE 1982 TIUS
PLK_GVWR=19,501 TO 26,000
PERCENTAGE BAR CHART
TIU_GVH
i
FREQ
CUM.
FREQ
PERCENT
CUM.
PERCENT
6000 AND LESS
1
| xxxx
1
267
267
1.83
1 .83
6001-10,000
1
|xxxxxxxxxxxxxxxxx
i
1248
1515
8.54
10.37
10,001-14,000
1
jXXXXXKXXXXXXXXXXXXXXXXX
1
1652
3167
11.31
21.67
14,001-16,000
1
IXMXXMXXXXXMXXMMXXMXMXM
1
1621
4788
11 .09
32.77
16,001-19.500
1
IXKXXXXXKNNKXXKKXXXXXXXXXXXX
1982
6770
13.56
46 . 33
19,501-26,000
1
IXXXXNXXXXXXKXXKXXXXXXXXKXXXXKXXXXXXXXXXXXXXXXXXXXXKXXXXXXXXXXXXXXXXXXX
1
5122
11892
35.05
81 .38
26.001-33,000
1
IXXXXXXXXXXKXXXXXXXXXXXX
1
1699
13591
11.63
93.01
33,001-40,000
1
|xxxxxxx
1
490
14081
3.35
96.36
40,001-50,000
1
|xxxxx
1
389
14470
2.66
99.02
50.001-60,000
1
1 X
1
96
14566
0.66
99 .68
60,001-80,000
1
1 *
47
14613
0.32
100.00
oj I
+ + + + + + + + + + + + + + + + + - -
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34
PERCENTAGE
-------
several records of trucks listed with a Polk GVW rating of 0-6,000 lbs,
an average GVW rating of over 130,000 lbs and an engine size in excess o£
1,000 cid.
Prior to an analysis of the TIUS data, it was therefore necessary to
develop a classification scheme in which information on gross vehicle
weight was consistent with other data on engine size, fuel type, make,
vehicle type (e.g., tractor-trailer versus pick-up), etc. It also was
essential to scan all of the records in the TIUS in order to 1) eliminate
incorrectly coded or obviously unreasonable data, and 2) to provide a
common data subset in which all relevant information was present
Table 2-2. lists the criteria used to reclassify trucks by gross vehicle
weight category based on an analysis of the consistency among the record
fields on fuel type, "average" gross vehicle weight (TIU_GVW), R.L. Polk
gross vehicle weight rating (PLK_GVWR), and engine size (ENG_CID).
These criteria were developed from a review of the historical literature
on the size, weight and fuel type specifications of truck bodies and
engines marketed by engine and truck manufacturers in the U.S. The
application of these criteria eliminated 4,344 records (or 5.1 percent of
the total) which could not be reclassified.
Tables 2-3 through 2-6 cross - tabulate the weight classification scheme
developed by EEA with that used by TIUS and R.L Polk. The tables are
disaggregated by fuel type and weight class. The tables show that
except for a few of the mid-range truck weight strata where there was
considerable uncertainty concerning the gross weight classification of a
truck, the reclassification scheme developed by EEA was fairly success-
ful in grouping trucks into consistent single categories For instance,
63 percent of the gasoline fueled light-duty trucks with a TIU_GVW
classification of under 6,000 lbs and 96 percent of the gasoline fueled
light-duty trucks with an R L Polk GVWR rating of under 6,000 lbs fell
2-4
-------
TABLE 2-2
RULES FOR
EEA_CVW
CLASSIFYING TIUS RECORDS INTO EEA_GVW/FUEL TYPE
FUEL TYPE POLKJ3WR TIU_GW
CATEGORIES
ENG_CID
50,001+
Diesel
33,001+
50,001+
>800*
50,000+
Gasoline
33,001+
50,001+
>480
33,001+ -
Diesel
33,001+
33,001 -
>600
50,000
50,000
33,001+ -
Gasoline
33,001+
33,001 -
>480
50,000
50,000
26,001 -
Diesel
26,001 -
26,001 -
400 - 700
33,000
33,000
33,000
26,001 -
Gasoline
26,001 -
26,001 -
>360
33,000
33,000
33,000
19,501 -
Diesel
19,501 -
19,501 -
400 - 700
26,000
26,000
26,000
19,501 -
Gasoline
19,601 -
19,501 -
>360
26,000
26,000
26,000
16,001 -
Diesel
16,001 -
16,001 -
400 - 600
19,500
19,500
19,600
16,001 -
Gasoline
16,00L -
16,001 ¦
>360
19,500
19,500
19,500
14,001 -
Diesel
14,001 -
14,001 -
<400
16,000
16,000
16,000
14,001 -
Gasoline
14,001 -
14,001 -
240 - 430
16,000
16,000
16,000
10,001 -
Diesel
10,001 -
10,001 -
<400
14,000
14,000
14,000
10,001 -
Gasoline
10,001 -
10,001 -
240 - 480
14,000
14,000
14,000
6,001 -
Diesel
6,001 -
6,001 -
<400
10,000
10,000
10,000
6,001 -
Gasoline
6,001 -
6,001 -
240 - 480
10,000
10,000
10,000
0 - 6,000
Diesel '
0 - 6,000
0 - 6,000
<300
0 - 6,000
Gasoline >
0 - 6,000
0 - 6,000
<360
* If MAKE-GMC or Chevy and ENG_
_CID>500 and
either POLK GVWR-
33,001+ or
TIU_GVW=50,001+, then classify
"as EEA_GVW~
50,001+.
2-5
-------
TABLE 2-3
FREQUENCY DISTRIBUTIONS OF 1982 TIU5 DATA
FUEL-GASOLINE
TABLE OF EEA GVU BY TIU GVU
EEA_GVW
FREQUENCY
PERCENT
ROM PCT
COL PCT
TIU GVU
6000 AND I 60 01 -10 > I 1 0 , 001-1 I 14, 0 01-1 I 16 , 00 1 - 1 | 1 9 , 50 1-2 I 26 , 001 - | 50, 001 +
LESS 1 000 |4,000 16, 000 I?,500 ) 6 , 000 '-' ] , 000 I
TOTAL
UNKNOWN GVUR
282
897 I
657
371 1
348 1
690
233 I
215 |
3693
0.51
1.64 j
1. 20
0 .66
0.63
1 .26
0 42 |
0.39 |
6 .73
7 .64
24 29 1
17.79
10.05 1
9 42 |
18. 68
6.31 |
5.82 |
1.61
8.03 j
13.63
11.98 I
10.16 j
8 42
7 35 I
6.15 I
6000 AND LESS
) 1022
tO . 10
90 21
63 12
915
1.67
7 . 49
8.19
6001 TO 10.000
5662
10 33
17 26
32 42
7442
13 57
48 .97
'66.63
I 86
0.16
I 0.70
I 1. 78
1 314 I
2 40 |
8.65 I
27.25 I
32 38
0.06 0.07
0.26 0.31
1.03 I 1 . : 1
290 170
0.53 | 0.31
1.91 1.12
9.36 | 4.96
98 I 15
0 18 i 0 03
0 30 I 0 12
1.20 I 0.47
229 I 49
0.42 I 0 09
1.51 i 0.32
2.79 I 1 55
12 I
02 |
10 I
34 |
I 41 |
I 0 07 |
f 0.27 |
I 1.17 |
12216
22 . 28
15197
27 7 1
783
1.43
2438
4 . 45
4052
7 39
11529
21 . 02
2786
5 .OB
10.001 TO 14,000 |
78
193
344
48 1
40
67
10
1 1
0. 14
0 .35
0.63
0 09
0
07
0 . 12
0 .02
0.01 |
9 96
24 .65
43. 93
6 13 |
5
11
8 56
1 28
0.38 |
0.45
1 73
7.13
1.55 |
1
17
0 .82
0 . 32
0.09 |
91
197
215
1779 |
55
91
8
2 1
0 17
0 36
0 .39
3 24 1
0
10
0 .17
0.01
0.00 I
3.73
8 08
8 .82
72.97
2
26
3.73
0 33
0 . 08 1
0.52
1 76
4 46
57 42 |
1
61
1 11
0 .25
0.06 j
14,001 TO 16,000
16,001 TO 19,500
I
75 I
0.14 |
1.85 |
0.43 I
411
0 .75
10 . 14
3.68 I
590
1 08
14 . 56
12. 24
45
0.08
1.11
1.45
1899
3.46
46 .87
55 . 46
800
1.46
19.74
9.76 j
165
0 30
4.07
5.21
+
67 |
0.12 |
1.65 I
1 . 92 |
19,501 TO 26,000
26,001 TO 33,000
I 181
I 0.33
1 57
I 1.04
135
C 06
1.26
0.20
968
1 . 77
8.40 i
8.67 |
82 I
0 . IS I
z.ts I
0 .73 I
1427
2.60
12. 38
29.59
127
0 21
4.56
2.63
439
0.80
3.81
14.17
80
D. 15
2.87
2. 55
625 |
1.14 |
5.42
18.25 I
220 I
0 48
7 \
6.43 |
5415
9.87
46 97
66.05
+
699
1.29
25.09
S.5J I
1564
2 85
13. 57
49.35
892
1 63
32 02
2S 15
910
1.66
7 89
26.04
+
I 651
I 119
I 23.37
I 1-8.63
33,091
10 50 r 000
36
1
62
14
29
109
23 J
1151 |
1920
0
07
0.12 1
0.11
0. 01
0
05
a.20
Q.42
2.50 I
3.50
1
8B
J 33 I
3 21
0.73
1
51
5.68
12.14
71.51 |
0
21
0 .57 |
1 29
D. 45
0
B5
1.13
J .35
19.30 I
50,001
AND UP
0
0 1
0
0
0
0
0
220 I
220
0
00
0 00 I
0.00
0.00
0
00
0.00
0. 00
0.40 |
0 .40
0
00
0 00
0.00
0.00
0
00
0.00
0 00
100.00 I
0
00
0.00 I
0 00
0.00
0
00
0.00
0 00
6 30 |
TOTAL
17462
11169
4B22
3098
3424
8198
3169
3494
54836
31
.84
20 . S7
8.79
5.65
6
24
14 95
5 78
6 37
100 00
FREQUENCY MISSING = 4
-------
FRtQUEHCr QIVTRi&UT IQHS OF l<}&2 T1US. &Vt*
FUEL = DIESEL
EtA GVU
TABLE OF EEA GYW BY T1U_GVU
T1U_GVU
TABLE 2-4
FREQUENCY
PERCENT
ROM PCT
COL PCT
6000 AMD I 6001-10 , | 10, 0 01-1 114, 0 01-11 16 , 001-1119, 501-2 I 26. 0 Q l-
LESS 1000 |4,000 |6,000 |9,50O U.OOO [51000
50,001+
UNKNOWN 6VUR
11
0 .04
1.70
7 .24
39
0 . 14
6.04
20.63
65
0.23
10.06
2*. <15
58
0.21
8. 98
ZZ.
85
0.30
13.16
Zt 1*
185 1 49 I 154
0.66 ''0.17 0.55
28.64 7.59 23 84
I 2 8A I tt.fefc
6000 AND LESS
131
0 . 47
?9.24 ¦
86 18
0
0.00
0 00
0.00
1 I 0
0.00 1 0.00
0.76 D.00
0.35 | 0.00
0
0.00
0.00
0 00
0
0.00
0. 00
0.00
0
0.00
o.oa
0.00
0
0.00
0. 00
0. 00
6 0 0 1 TO HO,000
0 I 103 I 13 I 3 | 2 1 10 1 3 1 9
0 00 0 3?! 0 05 0.01 | 0.01 0.04 1 0 0]] 0 03
0 00 72.03 1 9 09 2.10 1 1-40 | 6 99 I 2.10 | 6.29
0 00 I 54.50 I 4 61 I 1.18 I 0 54 I 0 62 1 0 17 I 0.04
10,001 TO 14,000 1 0
O.OO
0 00
1 0.00
0
0.00
0.00
0.00
fit
0.29
90.00
28.72
0
0. 00
0.00
0 . 00
1
0.00
J .11
0.27
2
0.01
2.22
0.12
3
0.01
3.33
0.17
3
0.01
3.33
0.01
14,001 TO lfc.QQO
Q
0.00
0.00
0 00
a
0.00
0.00
0.00
1
0.00
0.00
9.00
0.17
95.92
18.50
0 .00
2 04
0.27
S>
0.00
0.00
0.00
S V 1
0.00 0.00
0.00 2.04
0.00 | 0.00
16,001 TO 19.500
19,501 TO 26,000
0
0.00
0.00
0 00
3
0.01
0.28
1 .97
1
0.00
1.15
0.53
11
0. 04
1 DI
5.82
2
0 .01
2.30
0.71
49
0.17
4. 52
17. 38
0
0.00
0.00
0.00
45
0.16
4.15
17.72
80
0.29
91-95
21 .45
59
0.21
5.44
15-82
0
0.00
0.00
0.00
76 7
2.74
70. 76
47.49
0
0.00
0.00
0.00
14
0.05
I 29
0.81
4
0.01
4 60
0.02
136
0 49
12.55
0. 58
26,001 TP 33,ODD 1 2
I 0 .0 1
< <1 44
I 1 .32
20 I 46
0.0? [ 0.16
11
10.5S 1 16.31
71
0.25
2.14
27.95
109 I 57«
0.3? | 2.0«
29-22 I 35.79
1382
4 93
BD. 02
1172
4. IS
3
-------
FREQUENCY DISTRIBUTIONS OF 1982 TIUS EATfc
FUEL-GASOLIIHC
TABLE OF EEA GVW Br PLK_6VUR
TABLE 2-5
EEA.GVI^
FRESUEffCr
percent
ROW PCT
COL PCT
PLK_GVWR
6000 ArtDUOOl TO
LESS ilOrO°0
UNKNOWN GVMR
324
0.59
0.77
2.93
312
0-57
a. 44
1 . 86
110,001 r|14.001 TIl6,001 TI 19,5P1 T|26,C01 tI33
10 14 P 00 DI 0 16,000 0 19 j 5 0 0 10 26,000|0 33,OOOlND
h + +_ + + 1- —
779
1.42
21 . OB
18 . 71
,001 A
UP
235
0 .4 J
6 .36
22.60
I
1232 |
2.25 I
33,34 |
8. 43 |
300 |
6000 ai*d less
I 10631
1469 1
43
28
. 16 1
13
8
8
I 19 39
2-68 1
0 08
0.05
0 03
0
02
0
01
0 01
1 57 01
12 02 1
0.35
0 23
0.15 j
0
11
0
07
0.07
| 96 10
8 " |
4.13
2.46
0.43 |
0
09
0
23 1
0 31
t>001 1(1 VQ.OOB
10,001 TO 14,000
r-o
19
0 . 07
0 26
0. 35
+ ^ +
i6
0.01
0.77
0.05
27-33 |
98-63 1
89-35 |
1
0-00
0.13
q.QI
71 1
0.13 I
0 .48
7.02
683
1.25
87.23
45.67 I.
*22 \
0.04 I
0 14
1 . 93
21
0.04
2.68
1.44.
It) 1
0 05 I
0 20
0 . 72
37
0.07
4.73
Q.41
^3 1
0.06 I
0 22
0.23
21
0 . 04
2 .68
a .ja
i )
0.00 I
0 01
0.03 I
5 I
0 01 I
0 64 I
a w I
ID t
0 02 |
0 07 I
0.39 |
9 I
0 . 02 |
1 15
<1
TOTAL
11040
20.13
16776
30 59
1040
1 . 90
1139
2 08
4164
7.59
14615
26 . 65
3524
6 .43
2542
4 64
TOTAL
36 95
t.14
12218
22.28
1 5197
27.71
783
1.43
14,001 TO 16,000
16,001 TO 19,500
4
0.01
0 16
0 04
5
0.01
0. 12
0 . 05
2
0 00
a. 08
D oi
0
D • 00
o .DO
0.00
0 I 815
0.00 1 1 49
0 00 33.43
0.00 I 71 55
0 I 0
0.00 1 0.00
0 00 1 0.00
0.00 1 0 . 00
504 1 1021
0.92 1.86
20.67 41.88
12.10 | 6.99
2786 1 U33
5.08 i 2.07
68.76 j 27.96
66.91 i 7.75
57 1 35 I 2438
0 10 1 0.06 1 4.45
2 34 1-44 I
1 62 i 1 38 I
95 1 33 | 4052
0.17 < 0 06 1, 7.19
2.34 1 0 81|
2 70 1 1 30 I
19,501 TO 26,000 1 18
I 0.03
0. 16
| 0. 16
1
a.00
0-01
o 01
0
0 . 00
0.00
0.00
0 | 0
0.00 | O.oo
0.00 o 00
0.00 I o.oo
11095
20.23
96 22
75. 92
317 1 100 | 11531
0.58 1 0 18| 21.03
2 75 1 087 |
9.00 1 3.93 I
24,QUI to 11.
"i \ ^ \ S Si *i 1>
0. ~ l I | OD a.00 1 0.00 1 o.DO
o. le | o »4 | o n | o .oo o. oo
0. 05 | o OL I I D 1 0.00 0.00
t> \ - 1 ">1 1 27&6
0.00 4 .'94 0 13 | 5.08
ODD 1 97.24 1 2 55|
0. 00 | 76.67 1 2.79 i
33,001 TO 50,000
a | i
0 .01 0-00
0.42 0-05
a .07 I o -¦oi
& 1 1
0.01 O.DD
D.J1 I 0.05
0 58 t 0.09
10 I 34 | 40 1 1S2 0 1 1920
0.02 f 0.06 1 0.07 3 32 I 3 50
0.52 I 1.77 | 2.08 94.79 |
0.24 L a. 23 I 1.14 I 71.-60 [
50,001 AND UP
0
0.00
0.00
0 . 00
0 1 of 0
0 00 I 0 00 1 0.00
0 00 0.00 o.oo
0 00 | 0 .00 1 0 0 0
0
0 .00
0.00
0.00
33 I 31 1 156 | 220
0.06 | 0 06 1 0.28 0.40
15.00 | 14.09 70 91
0.23 | 0.88 J 6.14 f
54840
1 0 0 00
-------
FREQUENCY DISTRIBUTIONS OF 1982 TIUS DATA
FUEL = DIESEL
TABLE OF EEA_GVU BY PLK_GVWR
TABLE 2-6
EEA_GVW
FREQUEHCY
PERCENT
ROW PCT
COL PCT
PLK GVWR
6000 AND16001 TO (10,001 T|14,001 TU6-001 Tll9,501 1126,001 T
| LESS 110,000 jo 14,000(0 16,000|0 19,500|0 26,000|0 33,000
to
¦o
UHKHOUM GVWR
17
3
3
1
10
124 L 183
305
646
0 . 06
0 .01
0.01
0.00
0.04
0 44
0 65
1.09
2.31
2.63
0 .46
0.46
0.15
1.55
19 20
28 33
47 21
9 .94
1 .67
5.88
3.85
17 .54
12.05
5 20
1.33
6000 and LESS
92
36
0
2
0
0
0
2
132
0.33
0, 13
0 00
0.01
0.00
0.00
0 . 00
0.01
0.47
69.70
27 ,27
0 . 00
1 .52
0.00
0 00
0.00
1.52
53.80
20 , 00
O .00
7.69
0 .00
1.00 t 0.00
0-01
6001 TO 10,000
4
H7
6
1
4
8
2
1
143
Q 01
0 ,42
0.02
0 00
0 01
0 03
0 01
0 .00
0 51
2.SO
81 ,82
4.20
0.70
2.80
5 59
1 .40
0.70
2.34
65 . 00
11 .76
3.85
7 . 02
0.78
o ob
0 00
10.001 TO 14,0 00
J
3
18
8
13
26
6
13
90
0.01
0 . 01
0 . 06
0.03
0 . 05
0 . 09
0 . 02
0.05
0 32
3. 33
3,33
20.00
a .89
14.44
28.89
6 67
14 44
1 . 75
1.67
35.29
30.77
22.81
2.53
0.17
0 .06
14,001 TO 16,000
0
0
0
4
2
23
12
8
49
0.00
0 . 00
0.00
0.01
0.01
0. 08
0 04
0 03
0.17
0.00
0 . 00
0.00
8.16
4.08
46. 94
24 . 49
16 . 33
o.oo
0.00
0 00
15.38
3.51
2 24
0. 34
0 03
16,001 TO 19,500
0 1 ot St 11 13
38
0
32
87
0.00
0 .00
0.01
0.00
0.05
0.14
0 . 00
0 1 1
0.31
o.oo
0 .00
3 45
1.15
14.94
43.68
0 00
36 78
O .00
0 CO
5.88
3 J5 1 22.81
3.69
0 . 00
0 14
19,501 TO 26,000
6
3
4
1
1
648
141
280
1084
O .02
0 .01
0.01 1 0 . Ofl
o. :o
2-31
0.50
1 00
3. & J
0. 55
0 28
0 37
0 .09
0. 09
59. 78
13-01
25 B3
J.51
1.67
7 84 I 3.05
1.75
62. 97
4.01
1.22 1
24 >001 J 0 33.000
6
2
5
1
2
88
2741
535 j 3380
0 02
0.01
0.02
O.QQ
a.CLL
a. si
\ \2 07
0 .18
0. 06
0 15
0.03
0.06
2.60
81 . 09
1 15.83
3.51
1.11
9.80
3.85
3.51
8.55
77.91
2.33
33,001 TO 50,000
16
6
7
3
5
35
231
5346 1 5649
0 . 06
0 02
0.02
0.01
0.02
0.12
0.82
19.09
20 17
0 .28
0 .11
0 .12
0.05
0 09
0.62
4 .09
94 64
9. 36
3.33
13.73
11 .54
8.77
3. 40
6.57
23 27
50,001 *MD UP
27
10
5
<
7
39
202
16452 1 16746
0.10
0 04
0 02
0.01
0.02
0.14
0 . 72
58. 74
59.79
0 . 16
0 06
0 03
0 02
0 04
0 23
1 21
98 24
15 79
5 56
9 80
15 38
12.28
3 79
5 74
71.61
TOTAL
171
100
51
26
57
1029
3518
22974 28006
0 61
O 64
0 18
0 09
0 . 20
3.67
12. 56
82.03
100.00
33,001 A
ND UP
TOTAL
-------
into the 0-6,000 lb EEA_GVW class. Seventy percent of the dlesel-fueled
heavy trucks with a TIU_GVW over 50,000 lbs and 72 percent of the
diesel-fueled heavy trucks with an R.L. Polk rating of over 33,000 lbs
fell into the 50,000+ EEA_GVW class.
Subsequent to the reclassification of the T1US records, the data were
screened for missing values and for reasonableness. As shown in Table
2-7, a two stage screening process was employed. First, a record was
deleted if pertinent data on the physical or operational characteristics
of the sample vehicle were missing (i e., missing fuel type, annual
miles, or area of operation) Second, a record was deleted if it
contained outlier data on annual miles traveled or fuel economy.
Examination of the data on annual miles per truck by weight category and
fuel type showed a wide dispersion which was expected given the large
variety of end-use applications in which trucks are used. For example,
Figure 2-2 shows the distribution of annual miles traveled by diesel-
fueled trucks weighing over 50,000 lbs GVW. Since the objective of the
study was not to do a detailed analysis of annual miles by major use
category, EEA did not impose any stringent criteria for screening vehicle
records on the basis of annual VMT/trucks. The only criteria imposed was
a 360,000 miles/year cutpoint derived by assuming no vehicle could
realistically travel more than 18 hours/day, 360 days/year, at an average
speed of 55 mph. This resulted in the elimination of about 300 records
which probably had incorrectly coded lifetime miles as annual miles.
Significant dispersion was apparent in the fuel economy data Based on a
review of available literature on truck fuel economy, EEA developed
criteria by weight category and fuel type to exclude outlier data These
criteria are summarized in Table 2-7.
2-10
-------
TABLE 2-7
CRITERIA FOR EXCLUDING TIUS RECORDS
Missing Data On:
• Area of operation
• Weight category
• Fuel type
• Annual miles per vehicle
Outlier Data On:
• Annual, miles per vehicle > 360,000
• Fuel economy:
GVW Class Fuel Tvne Ranee
0 - 6,000 lbs
All
MEG
<2
or
MPG
o
A
6,001 - 10,000 lbs
All
MPG
<2
or
MPG
>30
10,001 - 14,000 lbs
All
MPG
<2
or
MPG
>20
14,001 - 16,000 lbs
All
MPG
<2
or
MPG
>17.5
16,001 - 19,500 lbs
All
MPG
<2
or
MPG
>16 0
19,501 -26,000 lbs
All
MPG
<1
or
MPG
<14 0
26,001 - 33,000 lbs
Gasoline
MPG
<1
or
MPG
>12.5
26,001 - 33,000 lbs
Diesel
MPG
<1
or
MPG
>14 0
33,001 - 50,000 lbs
Gasoline
MPG
<1
or
MPG
>10 0
33,001 - 50,000 lbs
Diesel
MPG
<1
or
MPG
>11 0
50,001+ lbs
Gasoline
MPG
<1
or
MPG
>9 0
50,001+ lbs
Diesel
MPG
<1
or
MPG
>9 5
2-11
-------
MIDPOINT
MILES YR
FIGURE 2-2
ANNUAL MILES BY TRUCK WEIGHT CLASS AND FUEL TYPE
EEA_GVW = 50 > 001 AND UP FUEL =DIESEL
PERCENTAGE BAR CHART
KXXXXKXXXXXXXKXXXXKXXXXXXXXXXXXXKXXXXXXXXXXXXXKXXXXXKXXXXXttXXXX
KXXXXXXXXXXXXXKXXXXMXXKXKXXXKXXXXXXKXXXXXKKXXXXXXXXMKXX.XKXXXXKXXX
KXXXXXXXXXXXXKKKXXMXXXXKXXXXKXXXXXXKKXXKXKKXXKKKXXXKXXXXKXXXXltMX
KXXXXXXXXXXXXXKXKXXXXXXMXXXXKXMMKXXKXXXXXXKKXXXXXXXKXXXXXXXXX
XXXXXXXXKXXXXXKXXXXXXXKKXXXXXXMMXXXKXXXXXXKXXXXXXKXX
KXMXXXXXKXXXXXXXXXXXXXXXXXXXKXXXKXXKXXKXXKXXXXKXX
KXXXXKXXXXXXXKXXXXXXXXXXXXXKXX
KXXXXXXXXXXXMXXXXXXXXXXXXXXXKXXXXKXXXXXXXXKXXXXKXXXXXX
XXXXXXXMXXXXXMXXXXXXXXXX
KXXXXXXXKXXXXXXXXXXXXXKXXKKXXXKKXKXKXMXXXXKXXKXXXXXKMMMXKKXXXXXX
XXXXXXXXKNMMXXXKKXKXXXX
KXXXXKKXKKKXMKKKXXXXXXKKXXXXKXXXXXXKXXXXXXKXXKK
XXXMXXXXXMXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXKXXXXXKXXXXXXXXMXXXXXXXXXXXXX
KXXXXXXXKXXXXXXXXXXXXXXXKXXXKXXXXXXKXXKXXXXXX
KKXXXKXXXXXXXXXXXXXXXX
KXXXXXXXXXXXXKKXXXXXXXXXXXXXXXXX
KXXXXXXXXXXXXX
XKXXXKXXXKXXKXKXXXXKXXXKXXXXKKXXKXXKXMfeXXXXXXXXXKXXMKXXXKXXXXXKXXKXXXXKXXK
xxxxxxxxxx
XXXXXXXXKXXXXXXXX
xxxxxxxx
XXXXXXXXXKXXXKKXXXXXXXXX
xxxxxxxxxxx
xxxxxxxxxx
KXXXX
KXXXX
xxxx
xxxxxxxxxx
X
XXX
XX
XX
X
XX
X
X
XX
xxxx
FREQ
CUM.
PERCENT
CUM.
FREQ
PERCENT
1061
1061
6 . 34
6 . 34
1 086
2147
6.49
12 .82
1068
3215
6. 38
19.20
1025
4240
6 . 12
25. 32
875
5115
5.23
30 .54
820
5935
4. 90
35.44
504
6439
3.01
38.4 5
907
7346
5.42
43.87
408
7754
2.44
46 . 30
1076
8830
6.43
52.73
382
9212
2.28
55.01
790
10002
4.72
59 . 73
358
10360
2. 14
61.87
544
10904
3.25
65.11
614
11518
3. 67
68.78
760
12278
4.54
73. 32
364
12642
2.17
75.49
539
13181
3.22
78.71
242
13423
1.45
80.16
1242
14665
7.42
87 . 57
171
14836
1 .02
88.59
279
15115
1.67
90.26
133
15248
0.79
91 . 05
400
15648
2. 39
93.44
191
15839
1.14
94. 58
166
16005
0. 99
95.58
88
16093
0.53
96.10
87
16180
0.52
96 .62
74
16254
0.44
97 . 06
173
16427
1 . 03
98.10
25
16452
0.15
98.24
53
16505
0. 32
98. 56
26
16531
0. 16
98. 7 2
26
16557
0. 16
98.8 7
21
16578
0.13
99. 00
31
16609
0.19
99. 18
19
16628
0.11
99. 30
10
16638
0. 06
99. 36
5
16643
0.03
99. 38
40
16683
0.24
99. 62
63
16746
0 . 38
100.00
PERCENTAGE
-------
Table 2-8 summarizes the number of records in the TIUS which were
excluded as a result of the reclassification of data and the elimination
of missing and/or outlier values. A total of 5,433 records were dropped
because the GVW could not be reclassified, or information on the state
of registration, area of operation, fuel type and/or annual miles per
vehicle was unknown. 7,224 records were excluded because the data on
fuel economy and/or annual miles were judged to be unreasonable. An
additional 721 records which contained both missing and outlier data
were also dropped. This criteria reduced the original TIU data base by
15.9 percent to produce a subset of 70,956 records for further analysis
2.3 CALCULATION OF AVERAGE ANNUAL MILES PER VEHICLE. FUEL ECONOMY AND
STOCKS
To expand the TIUS sample to the total universe of trucks in operation
in 1982, each record was multiplied by an expansion factor which varied
by state of vehicle registration, vehicle body type, and vehicle weight
(pickups, vans, single unit trucks under 26,000 lbs GVW, single unit
trucks over 26,000 lbs GVW, and tractor trailers). Since many records
were dropped in the data screening process, the expansion factors were
revised in order to recreate the original estimate of the total truck
population. This was accomplished with the following formula:
EFr - (EF0) ST0CKo
ST0CKr
revised expansion factor (which varies by state and by
sample type)
original expansion factor contained in the 1982 TIUS
computer tape
estimate of state truck registrations (by sample type)
assuming no TIUS records are excluded
where:
EFr
STOCKq
2-13
-------
TABLE 2-8
SUMMARY OF EXCLUDED RECORDS
Gross Vehicle Number of
Weight Records in TIUS
0- 6,000
12,544
6,001-10,000
15,559
10,001-14,000
886
14,001-16,000
2,502
16,001-19,500
4,245
19,501-26,000
13,078
26,001-33,000
6,273
33,001-50,000
7,646
50,001+
17,002
Unknown
4.599
Total
84,334
Outlier Missing and Revised
Data
Outlier Data
TIUS
1,678
254
10,508
1,446
128
13,770
90
16
766
195
17
2,079
378
44
3,783
1,188
124
11,659
512
84
5,641
745
28
6,807
982
26
15,943
10
0
0
7,224
721
70,956
Missing
Data
104
215
14
211
40
107
36
66
51
4.589
5,433
2-14
-------
STOCKr - estimate of state truck registrations (by sample type)
using the TIUS data base purged of invalid records.
To estimate the fuel economy characteristics of the 1982 population of
medium- and heavy-duty trucks from the TIUS, a harmonic averaging
procedure was employed. A harmonic (as opposed to arithmetic) average
was employed since one of the goals of the analysis was to use the fuel
economy data to estimate fuel consumption. By weighting the data in
terms of gallons per mile, the harmonic procedure provided a represen-
tative estimate of the average fuel consumption characteristics of the
stock.
Total annual VMT (annual miles x expansion factor) was calculated for
each of the records in the TIUS and used to harmonically weight the fuel
economy data as follows:
Z 2 (AM)x(EF)
Avg. MPG - TVMT ~ n st
FC S 2 ((AM)x(EF))/mpg
n st
where:
Avg. MPG - travel-weighted harmonic average fuel economy
TVMT = total vehicle miles of travel
FC = fuel consumption
n - number of records
st - sample type which varies by truck body type, GVW, and
state of registration
AM - annual miles per truck
EF - expansion factor (to universe level)
mpg - miles per gallon
2-15
-------
Average VMT per truck was calculated using the following equation:
E Z (AM)x(EF)
Avg. VMT - TVMT - n st
STOCK E Z (EF)
n st
2.4 OTHER CONSIDERATIONS
The public use computer tape of the 1982 TIUS reported information on the
model year of the sampled truck. The most recent vintage sampled when
the survey was conducted (in calendar year 1982) was model year 1983.
The TIUS computer tape provided to EEA grouped together all truck records
with a model year of 1982 and 1983 and all truck records with a model
year prior to 1973. For the purpose of this analysis, EEA converted the
model year information to vintages assuming that trucks with a model year
of 1982 or 1983 were one year old, trucks with a model year of 1981 were
two years old, etc., and trucks with a model year of 1972 or earlier were
10+ years old.
As indicated in Table 2-1, the TIUS classifies trucks according to the
following areas of operation local, short-range, long-range, and
off-road. As the M0BILE3 and the M3FC models are designed primarily to
evaluate emissions inventories of highway vehicles, it was deemed
appropriate to exclude trucks used in off-highway applications from the
computation of vintage-based registration distributions, annual mileage
accumulation rates and fuel economy values. With the concurrence of EPA,
EEA dropped the off-highway trucks from the analysis. As shown in Table
2-9, this resulted in a further reduction of the total TIUS sample by
7,744 records or about 10 percent.
"k
Off-highway vehicles were, however, included in those portions of the
analysis which focused on total vehicle counts. (See Sections 3.4 and
3.5.)
2-16
-------
Gross Vehicle
Weight Class
0- 6,000
6,001-10,000
10,001-14,000
14,001-16,000
16,001-19,500
19,501-26,000
26,001-33,000
33,001-50,000
50,001+
Total
TABLE 2-9
OFF HIGHWAY VEHICLE FREQUENCY COUNTS
BY GVW CLASS
Revised
TIUS
CTable 7-91
10,508
13,770
766
2,079
3,783
11,657
5,641
6,807
15.943
70,956
Off-Highway
Vehicles
1,463
1,240
165
323
694
1,796
535
B45
683
7,744
Total TIUS
Excluding
Off-Highway
9,045
12,530
601
1,756
3,089
9,861
5,106
5 ,962
15.260
63,212
2-17
-------
3. RESULTS
3.1 INTRODUCTION
This section presents the results of the analysis of the 1982 TIUS
public use computer tape. Section 3.2 provides information on truck
registration fractions by gross vehicle weight, vintage and fuel type as
represented in the 1982 TIUS. The data also are compared with those
used in M0BILE3. Section 3 3 summarizes the 1982 TIUS data on average
annual mileage accumulation rates by GVW fuel type and vintage and
compares the results with the inputs used in M0BILE3. Section 3.4
presents 1982 TIUS information on fuel economy by gross vehicle weight,
model year and fuel type and compares the results with the inputs used
in the M0BILE3 Fuel Consumption (M3FC) model. Section 3.5 discusses
total vehicle counts by GVW category and fuel type. Section 3.6
summarizes the TIUS data on trucks by area of operation. Section 3 7
provides a brief comparison of the 1982 TIUS results with those drawn
from the 1977 TIUS.
To avoid confusion in the use of terminology, Table 3-1 presents the
gross vehicle weight categories and nomenclature used to display the
results of this analysis of the 1982 TIUS. The reader should note that
the TIUS does not distinguish between trucks in the 6,001-8,500 lb
category (Class 2A) and those in the 8,501-10,000 lb category (Class 2B)
In this study trucks in Class 2B are grouped with Class 2A when making
comparisons to M0BILE3 inputs with a vehicle class designation of "LDT2"
(6,001-8,500 lbs GVW). Similarly, trucks in Class 2B are not included
with those in classes 3, 4 and 5 when comparisons are drawn with M0BILE3
inputs with a vehicle class designation of "Light-Heavy Duty "
3-1
-------
TABLE 3-1
TRUCK NOMENCLATURE
Class
GVW Ranee
1
2
3
4
6
7
8A
0- 6,000
6,001-10,000
10,001-14,000
14,001-16,000
16,001-19,500
19,501-26,000
26,001-33,000
33,001-50,000
8fi
50,001+
EEA Nomenclature
Used for the
1982 TIUS
Light Duty Truck
Light-Heavy Duty Truck
Medium-Heavy Duty Truck
Heavy-Heavy Duty Truck
EPA
Nomenclature
LDTG1 (0-6,000)
LDTG2 (6,001-8,500)
HDGV (8,501+)
LDDT (0-8,500)
HDDV (8,501+)
- Light (8,501-19,500)
- Medium (19,501-50,000)
- Heavy (50,000+)
-------
3.2 REGISTRATION FRACTIONS BY VINTAGE
Table 3-2 summarizes the 1981 TIUS data on the distribution of truck
registration by vintage, fuel type, and weight category. The data show
that a significant fraction of the gasoline trucks over 33,000 lbs GVW
are more than 10 years old. This reflects, in part, the waning market
share of new gasoline trucks which has occurred in these weight classes
during the past few years. Likewise, the substantial share of older
gasoline trucks in the light-heavy classes (3, 4 and 5) results from an
extremely low level of new vehicle sales in these categories in recent
years. The heavy weighting of the diesel registration fractions for
classes 1, 2, 6 and 7 towards relatively young vintages is a direct
result of the growth in new diesel sales which occurred in these categor-
ies during the late 1970's and early 1980's.
Table 3-3 and Figures 3-1 through 3-3 compare the registration fractions
developed from the 1982 TIUS with those currently used in M0BILE3. As
shown In Figure 3-1, the LDT numbers generally indicate a small reduction
in the share of vehicles over 10 years of age compensated by a slight
increase in the fraction of 6-10 year old LDT's in-use. The share of
LDT's under 5 years of age has remained virtually unchanged between 1977
and 1982.
This bulge for 6-10 year old LDT's in the 1982 TIUS registration fraction
is attributable to the surge in light truck sales which occurred in the
late 1970's (and peaked in 1978). The LDT registration fraction used in
M0BILE3 had been "smoothed" to eliminate a similar "bulge" which had
occurred for 2-6 year old vehicles. EPA should consider smoothing the
1982 TIUS data in a similar manner.
The age distribution of heavy-duty gas vehicles has shifted dramatically
towards older trucks since the time period (1977) covered by the M0BILE3
3-3
-------
TABLE 3-2
1982 TRUCK INVENTORY AND USE SURVEY
COMPARISON OF REGISTRATION FRACTIONS BY VINTAGE BY GVH CATEGORY
„ FUEL=GASOLINE
AGE 1234567 8A SB
1
0.
051
a
oso
0
.016
0.003
0.004
0.006
0.032
0 .005
0.016
2
D.
.051
0
. 061
0.
.021
0.011
0 .007
0 .010
0.085
0 .014
0.018
3
0.
.058
0
058
0
.023
0 . 008
0.014
0 . 021
0.112
0 .022
0.024
4
0.
.076
0
163
0
051
0 . 022
0 . 018
0 . 069
0.091
0 .055
0.033
5
0.
.070
0
17 1
0
019
0 035
0.022
0 . 059
0.061
0 .041
0.027
6
0
062
0
1 44
0
041
0 021
0 028
0 073
0 . 050
0 035
0.015
7
~
0/4
0
0B2
0
007
0 028
0. 036
0 064
0.035
0 042
0.C30
8
D
05 1
0
052
0
013
0 . 048
0.034
0.087
0 . 050
0 . 086
0.099
<)
U
/
0
046
0
0 1 0
0 . 054
0 046
0.085
0 . 052
0 . 098
0 089
1 0
0
(J/0
0
041
0
Oil
0 . 06 2
0 . 050
0.090
0 . 059
0 . 079
0.094
10*
0
36 9
0
150
0
788
0 .708
0.741
0.435
0 . 374
0 . 523
0.554
ALL
1
000
l
000
1
. 000
1 . 000
1 . 000
1 . 000
1 .000
1 . 000
1 .000
ijj
4>-
-FUEL = DIESEL¦
AGE 1 234567 8A SB
1
0.339
0.329
0 013
0
030
0
000
0.041
0.063
0. 022
0 .043
2
0.287
0.045
0.043
0
.090
0
199
0.110
0.160
0. 053
0.073
3
0.141
0.065
0 . 064
0
140
0
158
0.136
0.134
0. 067
0.101
4
0. 146
0 173
0 525
0
220
0
061
0.160
0.130
0.112
0.141
5
0 . 080
0 . 152
0 . 052
0.
.104
0
066
0 . 112
0.106
0 . 099
0.110
6
0.000
0.013
0.002
0.
.046
0.
043
0.085
0.082
-0 . 079
0.103
7
0.005
0.008
0 . 068
0
042
0.
. 058
0 . 039
0.038
0. 046
0.044
8
0.000
0 007
0. 129
0.
.012
U
0"f9
0 .045
0.042
0. 063
0.057
9
0 . 000
0 . 029
0 . 132
0
000
0 .
, 0"19
0 .037
0.048
0. 086
0.079
10
0 . 000
0 . 031
0. 015
0
080
0 .
. 034
0 .034
0.051
0. 084
0.068
10+
0.003
0.150
0. 158
0.
.235
0 .
293
0 .202
0.146
0.290
0.181
ALL
1.000
1 .000
1 . 000
1.
.000
1.
000
1 .000
1.000
1.000
1.000
Categories
1=0- 6,000 lbs GVW
2 = 6,001 - 10,000 lbs GVW
3 = 10,001 -
14,000
lbs
GVW
4 = 14,001 -
16,000
lbs
GVW
5 = 16,001 -
19,500
lbs
GVW
6 = 19,500 -
26,000
lbs
GVW
7 = 26,001 -
33,000
lbs
GVW
8A= 33,001 -
50,000
1 bs
GVW
8B= 50,001+
lbs GVW
-------
TABLE 3-3
COMPARISON OF REGISTRATION FRACTIONS BY VINTAGE *
1982 TIUS
MOBILE3
AGE
HDGV
HDDV
LDT
HDGV
HDDV
LDT
1
0 . 008
0 . 041
0 . 036
0.079
0.090
0.067
2
0 . 017
0 . 084
0. 059
0 .136
0.151
0.085
3
0 027
0.102
0 . 060
0.116
0.126
0.081
4
0 058
0. 139
0.115
0.099
0.105
0. 077
5
0 (J 50
0 109
0.111
0 085
0.088
0.073
6
0 057
0 093
0 095
0.072
0.073
0 . 069
7
0 051
0.044
0. 077
0.062
0. 061
0 . 065
8
0 07 1
0 056
0.051
0 .053
0.051
0.061
9
0 072
0.073
0. 071
0 .045
0.043
0.057
10
0 . 076
0 . 066
0.057
0 .038
0.036
0.053
10+
0. 512
0 .192
0.267
0.216
0.175
0.312
ALL
1 . 000
1 .000
1 .000
1 .000
1.000
1 .000
* NOTE: HGDV and HDDV in 1982 TIUS refer to all trucks over 10,000 lbs GVW
whereas MOBILE 3 classifies HGDV and HDDV as all vehicles over 8,500 lbs GVW.
-------
FIGURE 3-1
Registration Fractions By Vintage
All Light Duty Trucks
(Under 10,000 ibs. GVW)
1 2 3 4 5 6 7 8 9 10 10+
AGE
-------
FIGURE 3-2
Registration Fractions By Vintage
All Heavy Duty Gas Vehicles
(Over 10,000 lbs. GVW)
AGE
-------
FIGURE 3-3
Registration Fractions By Vintage
All Heavy Duty Diesel Vehicles
(Over 10,000 lbs. GVW)
AGE
-------
registration fraction inputs (See Figure 3-2.) As indicated earlier,
this is a direct result of the dramatic increase in heavy truck diesel
sales (and waning gasoline market share) which has occurred since the
late 1970's. The share of heavy-duty diesel vehicles under 6 years of
age also has dropped by about 6-7 percent with corresponding increases in
the share of 6-10 year old HDDV's relative to M0BILE3. This trend is, in
part, attributable to the fact that 1982 was a recession year while 1977
was a year of economic recovery and consumers tend to retain their older
vhicles longer during periods of economic downturn than during periods of
expansion.
The Bureau of Census analysis of trucks over 10 years of age in the 1982
TIUS produced results which were not dissimilar to those in Table 3-3
despite the fact that it used different data base processing procedures.
As shown in Table 3-3a, the Census estimates indicate that about 52
percent of the HDGV fleet, 79 percent of the HDDV fleet and 71 percent of
the LDT fleet, respectively, was 10 years old or younger in 1982. The
Census data show that the HDGV fleet contained the highest proportion of
vehicles in the 11-20 age cohort in 1982 (approximately 36 percent) and
the HDDV fleet had the lowest proportion in this age class (about 20
percent). Roughly 25 percent of the LDT fleet was between 11 and 20
years of age. Nearly 12 percent of the HDGV fleet was over 20 years old
in 1982 while 4 percent of the LDT fleet fell in this age category This
constrasts sharply with the MOBILE3 input data which assumed that only
4.5 percent of the HDGV fleet was over 20 years of age and 2 percent of
all LDTs in use were over 20 years old.
3.3 AVERAGE ANNUAL MILEAGE ACCUMULATION RATES BY VINTAGE
Table 3-4 summarizes the 1982 TIUS data on average annual miles per truck
by vintage, fuel type and weight category. As expected, the data show a
general decline in annual miles per truck with increasing vintage. This
3-9
-------
Age
1
2
3
4
5
6
7
B
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
TABLE 3-3a
US BUREAU OF CENSUS
1982 TIUS ANALYSIS
TRUCKS IN USE BY ACE
1982 TIUS MOBILE3
HDGV HDDV LDT HDGV HDDV LDT
1
37X
4
212
3
25X
7
902
9
002
6
70X
3
4 9X
8
13X
5
74X
13
602
15
1QX
e
50X
3
BOX
9
87X
5
822
11
602
12
602
8
10X
7
02X
13
51X
10
392
9
902
10
502
7
702
6
56X
10
55X
10
652
8
502
8
802
7
302
6
23*
9
OOX
9
092
7
202
7
302
6
902
5
07X
4
24 X
7
692
6
202
6
102
6
502
6
21X
5
47X
6
98Z
5
302
5
102
6
102
6
(OX
7
23X
6
942
4
502
4
302
5
702
5
96X
6
602
5
892
3
802
3
602
5
302
5
32 X
4
69*
5
232
3
30X
3
00 2
4
802
4
OOX
3
50X
3
462
2
802
2
50 2
4
402
4
m
2
B32
3
242
2
402
2
102
4
COX
4
552
2
522
3
45X
2
002
1
702
3
602
3
012
1
712
2
372
1
802
1
40X
3
20X
3
20X
1
29X
1
95JC
1
502
1
20*
2
802
3
27X
1
192
1
852
1
302
1
OOX
2
40 X
2
4&X
0
772
1
5o:
1
102
0
802
2
002
2
37 X
0
&6X
1
232
0
902
0
70X
1
602
3
71X
0
*12
a
775!
4
50X
3
102
2
402
1
51*
0
282
0
56*
1
21*
0
192
0
LQX
1
05 X
0
161
0
35X
1
08*
0
212
0
282
0
68 X
0
142
0
23X
0
66 X
0
092
0
162
0
68X
0
08X
0
242
0
72X
0
08X
0
282
0
461
0
032
0
21X
0
44 X
0
032
0
162
3
OOX
0
342
1
152
3-10
-------
TABLE 3-4
1982 TRUCK INVENTORY AND USE SURVEY
COMPARISON OF AVERAGE ANNUAL MILES PER TRUCK BY VINTAGE BY GVW CATEGORY
AGE
-FUEL=GASOLINE-
4 5
8A
SB
1
16576
19643
17334
26895
20360
16310
23328
1249*
13412
2
14478
16113
14253
16323
16413
12821
16143
18584
45631
3
14250
14699
10734
20033
13987
14527
15698
12258
21012
4
11197
13011
15901
11607
15951
14294
15757
15894
48828
5
11091
11583
17415
144.15
14514
14363
126 08
13597
19768
6
11438
11392
1 3440
17920
14030
12783
15018
12383
25630
7
10131
10605
1 3?24
10979
10807
10895
14693
11043
68399
8
94 8 2
9315
1 ?b'<0
9615
11387
9729
11760
8895
27345
9
0 b fi
8 "><,6
7 5
11032
10422
9096
10609
10925
12628
1 0
SUst,
It '>b
b!2 6
9351
10291
8767
11993
9732
15620
10»
OS V
6 4 / 0
4303
6212
5085
5961
7731
7390
15098
FUEL =DIESEL
AGE
- w
1
2
3
4
5
6
7
8A
8B
CO
^ I
19240
20426
55532
47653
22847
29306
56100
93826
2
22789
26593
36319
44425
27448
27557
26002
53185
82742
3
16186
17780
23963
17393
25380
27212
25883
49186
77789
4
12848
17412
21112
17386
57417
26150
29008
48178
70163
5
8688
11381
28482
14980
22580
27916
27624
48017
64568
6
15000
19476
12000
15000
24890
28521
41085
61417
7
5317
24858
25626
21235
19299
23753
,29361
""42522
55049
8
^OCTOO
14251
70000
2JU53
175T3"
21592
30150
45965
9
,
15013
21000
7781
15743
25712
28767
44123
10
926 3
11500
536
29052
157 21
23312
25059
40995
10+
13063
11786
11543
7971
9729
11165
17944
20039
32489
-------
is a reflection of several factors including- increased costs associated
with maintaining and operating older vehicles, obsolescence, etc. The
data on diesel trucks under 19,500 lbs GVW and on gasoline trucks over
50,000 lbs GW show sharp swings in the mileage accumulation rates by
vintage. This is a direct result of the relatively low number of
vehicles sampled in these fuel type/weight class/vintage strata. As a
result, the standard errors associated with the annual mileage accum-
ulation rates for these strata are quite large. Nevertheless, the data
in Table 3-4 do present very clear and significant differences between
the annual mileage accumulation rates for gasoline-fueled light-duty
trucks and diesel-fueled heavy-duty vehicles. This is because heavy-
duty diesel trucks are the predominant vehicles used in long distance
over-the-road applications while gasoline-fueled light-duty trucks
dominate in local and short range applications.
The 1982 TIUS and the M0BILE3 mileage accumulation rates are compared in
Table 3-5 and in Figures 3-4 through 3-10. The mileage accumulation
rates for gasoline LDT's under 6,000 lbs show a slight reduction across
nearly all of the vintages represented in the 1982 TIUS vis-a-vis the
M0BILE3. (See Figure 3-4.) However, the reduction is small and (given
the standard errors associated with the data) not very significantly
different from M0BILE3 (It may, in fact, be explained by the increasing
use of LDT's for personal transportation which, based on the TIUS data,
is characterized by lower average annual mileages than applications such
as retail trade, services, etc.) EPA probably ought to retain use of the
M0BILE3 gasoline LDT1 mileage accumulation data in the next generation of
the emissions inventory model.
The annual mileage accumulation rates for the gasoline LDT's in GW Class
2 under 10 years of age, as represented in the 1982 TIUS, are consist-
ently lower than those used in M0BILE3. (See Figure 3-5.) On the other
3-12
-------
TABLE 3-5
COMPARISON OF AVERAGE ANNUAL MILES PER TRUCK BY VINTAGE
~
FUEL=DIESEL
1982 TIUS M0BILE3
AGE
LDT
LHDV
MHDV
HHDV
LDT
LHDV
MHDV
HtfDV
1
19337
52113
36411
93826
17552
45544
53370
82288
2
22851
32539
33686
82742
16262
39671
46901
74984
3
16263
22911
34146
77789
15068
34558
41190
68328
4
13310
23161
37230
70163
13961
30092
36206
62263
5
9103
22888
37729
64568
12936
26213
31812
56737
6
18647
5942
34220
61417
1 1986
22834
27948
51700
7
8051
23421
36 0 U 3
55049
11105
19898
24556
47111
8
20000
16 7 4 4
26 3b4
45965
10290
17332
21575
42930
9
15013
13 3 7/
27003
44123
9534
15098
18956
39119
10
9263
1 3538
23902
40995
8832
13152
16655
35647
10 +
12003
10099
18570
32489
5426
7313
9559
23560
FUEL =GASOL INE
1982 TIUS M0BILE3
AGE
LDT1
L DT2
HDGV
LDGT1
LDGT2
HDGV
1
16576
19643
19487
17394
18352
19967
2
14478
16113
15343
16 131
16946
18077
3
14250
14699
14827
14961
15648
16365
4
11197
13011
14716
13876
14449
14815
5
11091
11583
14238
12869
13342
13413
6
11438
11392
13348
11935
12320
12143
7
10131
10605
11333
11069
11376
10993
8
9482
9313
10120
10266
10504
9952
9
9366
8546
9675
9521
9700
9010
10
8046
7835
9334
8830
8956
8136
10+
6457
6470
5913
6374
8069
5099
* 1982 TIUS LDT is 0-10,000 lbs and M0BILE3 LDT is 0-8,500 lbs GVW
** 1982 TIUS LDT1 and LDT2 are 0-6,000 and 6,001-10,000 lb GVW classes
and M0BILE3 LDGT1 and LDGT2 are 0-6,000 and 6,001-8,500 lb GVW classes
-------
FIGURE 3-4
Annual Mileage Accumulation Rates
Gasoline LDTVs
1 2 3 4 5 6 7 8 9 10 10+
AGE
-------
FIGURE 3-5
Annual Mileage Accumulation Rates
Gasoline LDT2's
— MOBILE3-LDT2
-a- 82 TIUS-LDT2
T
10
T
10+
AGE
-------
FIGURE 3-6
Annual Mileage Accumulation Rates
Gasoline HDGV's
25000 *
— MOBILE3-HDGV
-» 82 TIUS-HDGV
20000 "
L-J
1
LU
o
IS
15000 -
10000 -
5000 "
T
10
10+
AGE
-------
FIGURE 3-7
Annual Mileage Accumulation Rates
Diesel LDT's
AGE
-------
FIGURE 3-8
Annual Mileage Accumulation Rates
Diesel LHDV's
AGE
-------
FIGURE 3-9
Annual Mileage Accumulation Rates
Diesel MHDV's
— MOBILE3-MHDV
-o- 82 TIUS-MHDV
~r~
10
—i—
10+
AGE
-------
FIGURE 3-10
Annual Mileage Accumulation Rates
Diesel HHDV's
100000
80000 -
N>
o
CD
S5
60000-
40000 -
20000
— M0BILE3-HHDV
-*> 82TIUS-HHDV
~r
10
t
10+
AGE
-------
hand, a comparison of the Census analysis of trucks over 10 years of age
in this category with M0BILE3 shows no clear shift in the mileage
accumulation rates. (See Table 3-5a). Since 1982 was a year of reduced
economic activity in relation to 1977, one would have expected a cor-
responding decline in the mileage accumulation schedule for GVW class 2
LDTs. The fact that this did not occur warrants further investigation.
In the interim, EPA should, at a minimum, adjust the M0BILE3 gasoline
LDT2 inputs to reflect the lower mileage accumulation for younger
vehicles (under 10 years of age) .
The data presented for gasoline heavy-duty vehicles in Figure 3-6 suggest
that a slight flattening in mileage accumulation rates has occurred over
the 1977 and 1982 time period as older trucks are used more intensively.
Nevertheless, the overall shift is small and of marginal statistical
significance. This shift is by and large confirmed by the Census
analysis of older trucks as reported in Table 3-5a. EPA should not
change its current M0BILE3 HDGV mileage accumulation rates.
The diesel mileage accumulation rates derived from the 1982 TIUS for
LDT's under 10,000 miles reflect the scarcity of data for this category.
As Figure 3-7 illustrates, the range of uncertainty in the estimation of
the diesel LDT mileage accumulation rates is very large. Until more
diesel LDT data become available (perhaps by the time that the 1987 TIUS
is conducted), EPA should retain the current mileage inputs used in
M0BILE3 for this category.
The light-heavy (10,001-19,500 lb GVW) diesel mileage accumulation rates
estimated from the 1982 TIUS show a substantial decline for the younger
vintages (e.g., ages 2-6) reLative to M0BILE3. (See Figure 3-8.) The
Census analysis of older • etudes shown in Table 3-5b illustrates a
relatively flat mileage accumulation for light heavy diesel trucks under
3-21
-------
Age
1
2
3
U
5
6
7
8
9
10
11
12
13
14
15
16
17
IS
19
20
21
22
23
2k
25
26
27
28
29
30
31
TABLE 3-5®
US BUREAU OF CENSUS
1982 TIUS ANALYSIS
ANNUAL VMT/VEHICLE BY AGE
FOR GASOLINE TRUCKS
1982 rius
MOBILE3
LDT1
LDT2
HDGV
LDT1
LDT2
HDCV
18511
13817
19743
12818
18352
19967
14789
19454
15378
12102
16946
18077
14452
13034
1435B
11427
15641
15068
11957
13357
14278
10789
14449
13961
11275
11769
13712
10187
13342
12936
10862
12013
12548
9619
12320
11986
10080
11467
10426
9082
11376
11105
9017
9439
9931
8575
10504
10290
8420
10066
9610
8096
9700
9534
8003
7549
8856
7645
8956
8833
7580
8235
7481
7 218
8270
8185
7740
8317
7792
6815
7637
7583
6838
6342
7337
6435
7052
7026
6079
7012
6641
6076
6511
6510
5434
5289
5928
5737
6012
6031
5310
5974
5251
5416
5552
5589
5886
4511
4122
5114
5126
5179
4321
7751
4 350
4829
4734
4798
4483
3821
4 5-40
4559
4371
4446
4934
3300
3 605
4305
4036
4119
4057
5898
3107
3690
2060
3016
2329
1498
2731
3682
2296
2280
2054
1443
2187
2533
2740
2217
2865
2126
2485
4470
2197
1832
3746
1413
2044
1858
3432
0
2688
1109
1709
3-22
-------
Aga
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
IS
19
20
21
22
23
24
25
26
27
28
29
30
31
TABLE 3-5b
US BUREAU OF CENSUS
1982 TIUS ANALYSIS
A5WUAL VMT/VEHICLE BY AGE
FOR DIESEL TRUCKS
1982
TIUS
MOBILE3
LOT
LHDV
MHEV
HHDV
LDT
LHEV
HHDV
HHDV
20034
15076
38157
91250
17552
45544
53370
82288
22463
21221
33071
78333
16262
39671
46901
74 984
19724
15951
33757
76215
15068
34 558
41190
68328
12955
14134
36908
67592
13961
30092
36206
62263
3122
13750
36379
61757
12936
26213
31812
56737
8713
12480
32685
58891
11986
22834
27948
51700
8416
12191
31763
53745
11105
19898
24556
47111
0
14634
24474
44764
10290
17332
21575
42930
0
5264
25178
42078
9534
15098
18956
39119
10777
7451
21317
39787
8833
13152
16655
35647
8182
6312
21685
36695
8185
11456
14632
32483
7534
8550
18681
32692
7583
9979
12856
29599
6286
7380
17984
31399
7026
8693
11296
26972
866
6291
15769
28942
6510
7572
9925
24578
7273
9382
12112
25441
6031
6596
8719
22396
14010
4245
10913
22456
5589
5746
7661
20408
8943
5563
116 25
2 3 910
5179
5CD5
67 2i
18597
3S15
222S
8144
22978
47J8
4360
5913
16946
5938
6022
11399
19313
4.16
3798
5196
15442
a
2071
10497
18.334
4il9
5308
ISii
14071
3238
2231
5675
24450
3815
2006
7383
8426
120
0
9777
14806
0
898
10822
14212
0
693
6971
20359
0
1000
4699
8923
0
0
4416
11031
0
17216
3733
5236
0
606
9291
6595
0
0
0
21881
0
759
3146
11997
3-23
-------
8 years of age (*vL2,000 miles/year) followed by a sharp reduction to a
comparatively static mileage accumulation of 7,000 miles per year
thereafter. The reason for this is not clear. The number of new diesels
sold in this category in the years between 1977 and 1982 was relatively
low, which indicates that the 1982 TIUS sample size may not have been
large enough to accurately reflect the trend in mileage accumulation.
Regression analysis of the 1982 TIUS data is, therefore, suggested as an
additional approach to measure changes in the shape of the mileage
accumulation rates for light-heavy diesel vehicles that may have occurred
between 1977 and 1982.
The data'-presented in Figure 3-8 suggest that a significant flattening in
the mileage accumulation rates also occurred for age 1 through age 7
medium heavy diesel vehicles between 1978 and 1982. As with light-heavy
diesels, the Census tabulation of mileage accumulation rates for older
MHPV's indicates that the trend has relatively flat. (See Table 3-5b.)
EEA suggests that additional regression analysis of the data be conducted
to determine if a curve representing relative constant mileage accumula-
tion for the first 7 years, followed by a gradual decline over later
vintages, might be more appropriate for medium-heavy duty diesels than
the current mileage distribution used in M0BILE3.
The data on diesel heavy heavy-duty vehicles show significantly higher
mileages across all vintages in the 1982 TIUS vis-a-vis the M0BILE3. (See
Figure 3-10.) Given the continued growth in this truck category between
1977 and 1982 and the fact that 1982 was a year of reduced economic
activity relative to 1977, the reason for this trend is not immediately
apparent. The trend, however, is statistically significant and is
confirmed in the Census analysis of mileage accumulation rates for older
HDDVs. (See Table 3-5b ) EPA should, therefore, adopt the 1982 TIUS
data for this truck class for future versions of M0BILE3. Further
3-24
-------
analysis and investigation of the reasons for the differences between the
1982 TIUS and the M0BILE3 data also is recommended.
3.4 AVERAGE FUEL ECONOMY BY MODEL YEAR
Estimates of average fuel economy by weight category, fuel type and model
year from the 1982 TIUS are presented in Table 3-6. For both gasoline
and diesel-fueled vehicles, fuel economy varies inversely with weight.
And within each weight category, diesel vehicles exhibit a fuel economy
advantage relative to their gasoline-fueled counterparts. In addition,
within several of the weight categories, there appears to be a statisti-
cally significant trend in fuel economy by model year. For example, the
gasoline-fueled 0-6,000 lbs LDT class exhibits a trend of increasing
fueleconomy -- from 12.5 mpg in 1973 to 16.4 mpg in 1981) -- which is
clearly the result of the Corporate Average Fuel Economy (CAFE) standards
mandated for manufacturers of this category of vehicle. Similarly, the
medium- heavy and heavy-heavy-duty gasoline and diesel vehicles (Class 6
and above) show a trend of rising fuel economy during the 1970's. This
is perhaps attributable to the increased use of fuel efficient engines
and fuel conservation retrofit devices stimulated in response to the oil
price increases and shortages of the 1970's. The fuel economy of
light-heavy and medium-range diesel (Classes 3-5) trucks shows no clear
model year trend. This is most likely the result of several factors.
Most importantly, the small size of the TIUS sample of diesel trucks in
Classes 3 through 5 reflects the low number of diesels sold in this
category during the 1970's, but may be biased in terms of an accurate
representation of vehicle end-use applications.
Table 3-7 and Figures 3-11 through 3-24 compare the TIUS estimates of
fuel economy by model year with those used in the M0BILE3 Fuel Consump-
tion (M3FC) model. With respect to light-duty trucks under 6,000 lbs
GVW, the 1982 TIUS data on gasoline models is generally higher than (but
3-25
-------
TABLE 3-6
1982 TRUCK INVENTORY AND USE SURVEY
COMPARISON OF AVERAGE FUEL ECONOMY BY MODEL YEAR BY GVW CATEGORY
MYR
FUEL-GASOLINE-
4 5 6
8A
8B
82
16 .
.83
12
, 29
9
.51
5.
. 09
6 .37
6
.78
5 10
5.
67
3.81
81
16 .
.44
11
48
7
.34
7
35
6.52
6
.14
5.18
5
31
5.00
80
17 .
.98
10
89
7
.28
7
12
6.13
6
.08
5.13
4 ,
, 93
4.77
79
15,
.29
10
98
7
36 '
5
93
6.71
5 ,
.68
5.05
4
54
4.86
78
15 .
. 30
11
55
7
42
6
35
6 67
5
81
4.75
4
90
3.83
77
1 4
30
11
1 9
7
54
6
33
5.82
5
82
4.51
4
86
4 . 16
76
1 3
1 8
1 0
72
9
32
6
25
6 . 49
5
61
4 63
4
. 54
2.35
7 5
1
& S
J 0
-------
TABLE 3-7
1982 TRUCK INVENTORY AND USE SURVEY
COMPARISON OF AVERAGE FUEL ECONOMY BY MODEL YEAR BY GVH CATEGORY
FUEL=GASOLINE
1982 TIUS M3FC
MYR
1
2
3
-5
1
1 OS
1
1
7
I
1
< 1
CO 1
8B
LDT
2B
3-5
6
7
8A
8B
X
82
16.83
12.29
6
. 39
6 .78
5 10
5.67
3 81
17 . 18
10.66
8 . 04
5.79
5.28
4.28
4.28
81
16. 44
11 .48
6
.97
6 . 14
5. 18
5.31
5. 00
16 . 95
10.55
7 .96
5.75
5.25
4.28
4.28
80
17.98
10 89
6
51
6 08
5.13
4 93
4.77
15.79
10.45
7 .88
5.72
5.22
4 .27
4.27
79
15.29
10 98
6
64
5 68
5. 05
4 . 54
4.86
12. 55
10.34
7 .79
5.65
5.18
4.26
4.26
78
15 30
11 55
6
59
5 81
4.75
4 .90
3.83
12.98
10.23
7.71
5 64
5 15
4.25
4.25
77
14 30
11 19
6
20
5 82
4 51
4 .86
4 16
13 30
10.12
7.63
5 60
5 10
4.15
4.15
76
13 IS
10 72
6
46
5 61
4 63
4 . 54
2 35
12. 30
10.12
7 52
5.60
5 10
4.15
4.15
75
12 85
10 43
6
44
5 48
4.71
4.41
4.66
11 .90
10.12
7 .40
5.50
5.05
4.05
4.05
74
12 71
9 73
6
27
5 67
4.52
4.21
3 42
10.60
10.12
7 . 30
5.53
5.08
4.07
4.07
73
12. 53
10.26
6
72
5.86
4.64
4.57
3.23
10.60
10.12
7 .21
5.57
5.12
4 .09
4.09
FUEL=DIESEL
1982 TIUS M3FC
MYR
1
2
3-5
6
7
1
1 O0
1 >
1
8B
LDT
2B
3-5
6
7
8A
8B
M
82
22.66
13.13
11 .58
8 .75
7 . 38
5.41
5. 37
23. 03
13.66
8.44
8.70
7 .17
5.38
5.33
81
27 .16
11 .56
9.75
7 .33
7 17
5.51
5.21
23.05
13.55
8.38
8.64
7.17
5.34
5.21
80
17 .62
8.89
9 .66
8.19
7 03
5.35
5. 07
21 .80
13.44
8.31
8. 58
7.16
5.31
5.09
79
16 .49
14.08
7 48
7 .07
6 . 55
5.33
4 .98
17 .57
13.34
8.24
8. 52
7.15
5.27
4.98
78
11 .36
11.71
9.56
6 .97
5.88
5.28
4.95
18 .43
13.23
8.18
8.46
7.15
5.24
4.86
77
8.00
11.90
10.07
6.65
5 75
5 .09
4.85
18 .88
13.12
8.11
8.40
6 .93
5.20
4.74
76
15.34
9. 32
9.53
6.57
5.59
5.30
4.87
17 .46
13.12
8.11
8.25
6.82
5.37
4.57
75
4.80
5.51
6 .41
5.42
5.04
4.77
16 .89
13.12
8.11
8.25
6.70
5.54
4.40
74
8.36
6 .23
5.68
5 64
5.04
4.75
13.12
8.11
8.25
6 .67
5.56
4.39
73
,
7.07
6.99
6 .33
5.56
5.23
4.68
13.12
8.11
8.25
6.63
5.59
4.37
*NOTE1 TIUS DATA INCLUDE SOME MY1983 VEHICLES
''"las".!
""/e-Zo C'UVS-C,
C fc-'-i (9 T £ A y( " A J - t "',r <1J (i-i)
o*?«-
*'s
-------
MPG
FIGURE 3-11
Average Fuel Economy By Model Year
Gasoline (0-6,000 lbs GVW)
Model Year
-------
MPG
FIGURE 3-12
Average Fuel Economy By Model Year
Diesel (0-6,000 lbs GVW)
Model Year
-------
MPG
FIGURE 3-13
Average Fuel Economy By Model Year
Gasoline (6,001-10,000 lbs GVW)
Model Year
-------
24
£
20
18
16
14
12
10
8
6
4
2
IPG
FIGURE 3-14
Average Fuel Economy By Model Year
Diesel (6,001-10,000 lbs GVW)
¦ Mobile3
a 82 TIUS
~
-i 1 1 1 1 1 1 1 i r
73 74 75 76 77 78 79 80 81 82
Model Year
-------
FIGURE 3-15
Average Fuel Economy By Model Year
Gasoline (10,001-19,500 lbs GVW)
Model Year
-------
19
17
15
13
11
g
7
5
3
1
IPG
FIGURE 3-16
Average Fuel Economy By Model Year
Diesel (10,001-19,500 lbs GVW)
Model Year
-------
MPG
FIGURE 3-17
Average Fuel Economy By Model Year
Gasoline (19,501-26,000 lbs GVW)
Model Year
-------
11
10
9
8
7
6
5
4
3
FIGURE 3-18
Average Fuel Economy By Model Year
Diesel (19,501-26,000 lbs GVW)
h Mobile3
O 82 TIUS
-I 1 1 1 1 1 1 1 i r-
73 74 75 76 77 78 79 80 81 82
Model Year
-------
6.4
62
6.0
5.8
56
54
52
5.0
48
4.6
4.4
4.2
40
38
FIGURE 3-19
Average Fuel Economy By Model Year
Gasoline (26,001-33,000 lbs GVW)
¦ Mobile3
° 82 TIUS
—f—
73
i
74
-I-
75
76
77
-r~
78
79
—r~
80
—r-
81
—r~
82
Model Year
-------
MPG
FIGURE 3-20
Average Fuel Economy By Model Year
Diesel (26,001-33,000 lbs GVW)
Model Year
-------
MPG
FIGURE 3-21
Average Fuel Economy By Model Year
Gasoline (33,001-50,000 lbs GVW)
Model Year
-------
MPG
FIGURE 3-22
Average Fuel Economy By Model Year
Diesel (33,001-50,000 lbs GVW)
Model Year
-------
9
8
7
6
5
4
3
2
1
0
IPG
FIGURE 3-23
Average Fuel Economy By Model Year
Gasoline (50,001+ IbsGVW)
¦ Mobile3
~ 82 TIUS
-i 1 1 1 1 1 1 1 1 r
73 74 75 76 77 78 79 80 81 82
Model Year
-------
MPG
FIGURE 3-24
Average Fuel Economy By Model Year
Diesel (50,001+ lbs GVW)
Model Year
-------
follows the same trend as) that reflected in Figure 3-11. This simil-
arity in rising fuel economy with increasing model year is attributable
to the impact of the Corporate Average Fuel Economy (CAFE) standards and
the spurt in fuel prices in the late 1970's on the introduction of fuel
efficient models by the manufacturers. The generally higher levels of
fuel economy shown in the 1982 TIUS vis-a-vis M3FC is most likely due to
variations in the technology mix of vehicles within each model year
sample from which the 1982 TIUS and M3FC estimates were drawn. (See
Figure 3-11.)
Figure 3-12 reflects the sparsity of 1982 TIUS data available on diesels
under 6,000 lbs GW. Given the standard errors associated with the data,
it nevertheless shows a) generally rising trends in diesel fuel economy
with increasing model year as a result of CAFE, and b) the M3FC estimates
of diesel LDT fuel economy are relatively good in that they fall within
the range of the 1982 TIUS data.
Figures 3-13 and 3-14 indicate that the M3FC estimates for LDTs might be
understating the improvement in fuel economy which actually occurred in
gasoline models in the late seventies and overstating the trend in their
diesel counterparts. This is particularly true for gasoline LDTs, given
that one would have expected the converse to be the case since the M3FC
input data focuses only on trucks under 8,500 lbs while the 1982 TIUS
data made available to EEA includes the 8,501-10,000 lb category Since
trucks under 8,500 lbs are subject to CAFE standards, the rise in fuel
economy that is particularly evident in the post-1979 TIUS data is
expected. EEA, therefore, suggests that the M3FC data on Class 2
gasoline trucks be revised to account for this upward growth. It also
would be useful to perform some regression analysis on the diesel Class 2
1982 TIUS data to determine Lf there is any statistically significant
historical model year trend
3-42
-------
Figures 3-15 and 3-L6 show that the M3FC overstated historical trends in
the fuel economy o£ gasoline trucks between 10,001 and 19,500 lbs GVW and
understated trends in their diesel counterparts. The 1982 TIUS data on
the gasoline trucks in this weight category show a relatively flat model
year trend while the 1982 TIUS data on diesels show a generally increas-
ing trend after MY 1979. The trend for the gasoline trucks is consistent
with the relatively small number of trucks produced in this category over
the several years prior to 1982 and consequent low level of manufacturer
interest. The diesel trend is clouded with uncertainty given the large
standard errors associated with a relatively small sample of vehicles.
EEA recommends that the M3FC gasoline mpg data for this weight category
be adjusted to reflect the flat trend in fuel economy shown in the 1982
TIUS.
The inputs used in M3FC appear also to overstate the absolute level (but
understated the growth) in the fuel economy of diesel Class 6 trucks
(shown in Figure 3-1) relative to the 1982 TIUS. On the other hand, the
1982 TIUS estimates for gasoline-fueled Class 6 trucks are not signif-
icantly different from those used in M3FC. (See Figure 3-17.) Similar
observations may be made for the gasoline and diesel fuel economy data
for trucks in the 26,001-33,000 lb GVW class shown in Figures 3-10 and
3-20. EEA, therefore, recommends that the diesel M3FC inputs be changed
to reflect the 1982 TIUS data for these two classes.
The 1982 TIUS data on Class 8A diesel truck average mpg by model year are
slightly, but not significantly, higher than the values used in the M3FC
model for post MY 1977. (See Figure 3-22.) For prior model years, the
M3FC model overstates the 1982 TIUS. The discrepancy may be attributable
to differences in such factors as sample mix, market penetration of fuel
efficient devices, etc Similarly, the growth in gasoline fuel economy
in post MY79 trucks in this category may reflect increased use of fuel
3-43
-------
efficient technologies not captured in the earlier data used to generate
the M3FC inputs. (See Figure 3-21.) The differences between the 1982
TIUS and the M3FC are, however, not statistically significant. There-
fore, EPA should retain the current M3FC input mpg data for trucks in the
33,001-50,000 lb class
Given the relatively few and relatively older gasoline-fueled trucks in
Class 8B, the flat model year trend in the M3FC input data shown in
Figure 3-23 is quite consistent with the estimates obtained from the 1982
TIUS. With respect to diesel Class 8B trucks, however, the M3FC input
both understated the absolute mpg levels of older vehicles and overstated
the growth in fuel economy with increasing model year. (See Figure
3-24.) In part, this discrepancy may have been caused by the increasing
use of fuel efficient retrofit devices (i.e., radial tires, air drag
reduction devices, etc., since the late 1970's, which would raise the
fuel efficiency of the existing fleet. EPA should, nevertheless,
consider modifying the M3FC input data on diesel Class 8B trucks to
account for the higher fuel economy of older model year trucks reflected
in the 1982 TIUS.
As shown in Tables 3-7a through 3-7c, the Census analysis of the fuel
economy of older trucks in the TIUS is very consistent with our analysis
of the younger vehicles in the data base. The results obtained by Census
do not contradict our observations or recommendations concerning the fuel
economy inputs used in the M3FC model.
3.5 TOTAL VEHICLE COUNTS
Table 3-8 presents summary information on total vehicle counts, average
miles per truck and average fuel economy by weight category and fuel
type. Of a total 33 4 million trucks in-use in 1982, approximately 90.4
percent are light-duty trucks under 10,000 lbs. Heavy-heavy duty
3-44
-------
Model
Year
1982
1981
1980
1979
1978
1977
1976
1975
1974
1973
1972
1971
1970
1969
1968
1967
1966
19E-5
19:«.
19E-3
1962
1-961
1960
1959
1958
1957
1936
1955
1954
1953
1952
TABLE 3-7a
US BUREAU OF CENSUS
1982 TIUS ANALYSIS
FUEL ECONOMY BY VINTAGE
GASOLINE
_ _ _ j 2--.fr — Z-1? U L>_
0- 6,001- 8,501- 10,001- 19,501- 26,001- 33,001- 50,001+
6,000 8,500 10,000 19,500 26,000 33,000 50,000
15
05
12
12
11
28
5
12
6
21
5
16
4
56
3
29
14
77
11
84
8
51
8
ia
5
99
5
82
5
19
4
27
15
19
10
16
7
02
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a
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5
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5
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11
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13
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7
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4
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9
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5
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5
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5
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a
25
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4
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10
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7
12
7
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6
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0
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7
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4
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4
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6
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n
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7
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3
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10
25
7
54
4
57
7
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6
81
2
87
7
16
4
93
3-45
-------
Model
Year
1982
1981
1980
1979
1978
1977
1976
1975
1974
1973
1972
1971
1970
1969
1968
1967
1966
1965
1964
1963
1962
1961
1960
1959
1958
1957
1956
1955
1954
1953
1952
TABLE 3-7b
US BUREAU OF CENSUS
1982 TIUS ANALYSIS
FUEL ECONOMY BY VINTAGE
DIESEL
0- 6,001- 8,501- 10,001- 19,501- 26,001- 33,001- 50,001+
6,000 8,500 10,000 19,500 26,000 33,000 50,000
22
67
16
12
13
36
9
14
7
97
6
97
5
37
5
22
2B
55
13
30
11
63
8
64
7
45
6
78
5
66
5
12
15
06
18
20
7
81
7
78
7
14
6
58
5
50
5
03
14
50
17
63
4
98
6
97
6
86
6
38
5
32
4
94
15
47
14
97
7
13
6
86
6
61
5
52
5
23
4
83
2
84
4
90
7
66
6
34
6
12
5
05
U
77
18
36
10
36
3
09
7
38
7
12
5
44
5
20
4
83
5
80
6
03
6
25
5
26
4
98
4
72
9
67
9
17
7
41
5
67
5
22
5
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4
70
9
75
10
72
6
86
5
65
5
42
5
11
4
68
13
50
7
51
5
78
5
53
5
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5
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4
68
11
50
7
40
8
53
6
66
6
22
5
46
5
10
4
70
15
00
8
11
6
07
5
72
5
14
4
76
11
69
11
99
5
14
6
26
5
50
5
28
4
76
7
60
12
27
10
89
5
84
5
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4
64
5
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4
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9
88
18
80
11
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6
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4
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4
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4
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9
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11
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6
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6
93
5
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4
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4
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10
29
5
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3
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5
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4
71
4
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5
25
4
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5
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6
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10
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8
Z*
4
44
6
24
4
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4
60
3
00
3
76
4
18
5
81
4
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4
98
5
39
3
26
4
74
6
01
5
08
12
00
6
50
8
47
4
17
5
20
4
66
5
07
4
65
4
93
5
27
3
86
4
10
5
15
11
00
3
oo
4
92
4
67
3
54
6
30
3
61
5
19
5
20
5
30
4
37
4
05
5
61
4
58
5
36
9
00
7
35
4
62
5
27
5
83
3
49
5
50
3-46
-------
TABLE 3-7c
M3FC
HudO MPli ana Diesel Advantage Factors
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LDV Diese I LOI Uies« I -
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-------
vehicles (over 50,000 lbs GVW) account for 2.3 percent of the total
trucks registered in 1982. However, they accounted for over 10 percent
of the total miles traveled by the fleet. This is primarily attributable
to the preponderant use of heavy-heavy trucks in over-the-road
applications. As a result, the average annual mileage of a 50,000+ lb
GVW vehicle is about 56,600 miles or nearly 6 times that of a 0-6,000 lb
LDT in 1982 (see Table 3-8).
Table 3-8 also presents detail on the distribution of trucks by fuel
type. Approximately 4.8 percent (1.6 million ) of the total of 33.4
million trucks registered in 1982 are diesel-fueled, 84.5 percent are
gasoline-fueled, and the remainder (0.7 percent) are operated on LPG or
other fuels. About 75 percent of the diesel engines are used to operate
heavy-duty vehicles over 26,000 lbs GVW. In terms of weight class market
penetration, diesels range from 1.4 percent of the fleet af 0-6,000 lb
LDT's in-use to 98.7 percent of the 50,000+ lb fleet of heavy-duty
vehicles.
As indicated earlier in Section 3.4, diesels exhibit a fuel economy
advantage relative to gasoline vehicles in all weight categories
However, in several of the weight classes shown in Table 3-8, the
advantage is not statistically significant due to the relatively low
number of diesels in that particular class that were sampled in the
survey. (See, for example, trucks in the 10,001-14,000 lb class.)
3.6 TRUCKS BY AREA OF OPERATION
Tables 3-9 and 3-10 summarize the TIUS data on trucks by area of oper-
ation and weight category for gasoline and diesel-fueled vehicles,
respectively. 78 2 percent of all of the gasoline-fueled vehicles are
operated within the local area, 9.4 percent are used in off-road appli-
cations, 10 percent are driven over short ranges, and the balance (2.4
3-48
-------
Ill
TABLE 3-8
1982 TRUCK INVENTORY
AND USE
SURVEY
STOCK, VMT,
AND MPG ANALYSIS BY
GVH AND FUEL
TYPE
GVW
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
TOTVMT
(MI L L101
0 - 6,000
GASOLINE
10311
18229803
144753
9216
159
14.20
0.35
168007
0 - 6,000
DIESEL
112
268296
268296
17676
2103
21.72
3.45
4742
0 - 6,000
LPG/OTHER
85
135672
18670
13429
2810
10.85
2.38
1821
0 - 6,000
TOTAL
10508
18633771
146334
9369
159
14.29
0.35
174571
6,001 - 10,000
GASOLI ME
13470
11442470
108315
11138
220
10 94
0 . 32
127446
6,001 - 10,000
DIESEL
130
25620
2541
16872
2544
11 49
2.49
432
6,001 - 10,000
LPC/OIIII.R
170
49635
12476
20326
7563
7 58
3.48
1008
6,001 - JO,000
TOTAL
1 3770
11517726
108674
11190
220
10 90
0 32
128887
10,00 1 - 1 4 , 00D
CASOLINE
682
69423
1441
5798
411
7 97
0.88
402
10,001 - 14,003
DIESEL
77
12127
1506
17930
3814
8 . 01
2.51
217
10,001 - 14,000
LPG/OTHER
1 1
1142
170
13413
4522
5 55
2.23
15
10,001 - 14,000
TOTAL
770
82692
2176
7682
624
7 .90
1 04
635
14,001 - 16,000
GASOLINE
2029
208010
3369
7266
302
6.74
0 41
1511
14,001 - 16,000
DIESEL
42
3919
312
17498
3096
8.65
2.27
68
14,001 - 16,000
LPG/OTHER
14
1574
141
12664
3044
5.56
1.74
19
14,001 - 16,000
TOTAL
2085
213503
3389
7494
303
6.78
0 40
1599
16,001 - 19,500
GASOLINE
36 29
352543
3945
6448
185
6 69
0.26
2273
16,001 - 19,500
DIESEL
72
6108
322
21206
2774
7 .86
1 .45
129
16,001 - 19,500
LPG/OTHER
82
8307
388
12945
1506
5.21
0.81
1 07
16,001 - 19,500
TOTAL
3783
366958
3994
6841
190
6.66
0.25
2510
19,501 - 26,000
GASOLINE
10343
975364
7257
8395
140
5.85
0.13
8188
19,501 - 26,000
DIESEL
943
72114
1285
21499
895
7.03
0.44
1550
19,501 - 26,000
LPG/OTHER
373
33057
887
15020
863
5 04
0 40
496
19,501 - 26,000
TOTAL
11659
1080536
7429
9472
146
5.96
0.12
10234
26,001 - 33,000
GASOLINE
2466
142707
1678
11291
359
4.93
0.21
1611
26,001 - 33,000
DIESEL
3082
175959
1796
24895
567
6.30
0 .20
4380
26,001 - 33,000
LPG/OTHER
93
5195
357
21591
4001
4.39
1 .20
112
26,001 - 33,000
TOTAL
5641
323862
2488
18847
360
5.82
0 15
6103
33,001 - 50,000
GASOLINE
1694
95853
3262
8729
485
4.72
0.31
837
33,001 - 50,000
DIESEL
5086
267314
226 5
33304
702
5.23
0.15
8902
33,001 - 50,000
LPG/OTHER
27
1617
135
10827
3914
4 . 95
2.38
17
33,001 - 50,000
TOTAL
6807
364783
4461
26747
594
5.18
0 14
9756
50,001+
GASOlINE
182
9666
381
19013
2604
3.84
0 87
184
50,001+
DIESEL
15743
763708
3536
57136
533
4 .96
0 . 06
43634
50,001+
LPG/OTHER
1 3
655
126
41953
17504
4 . 58
2 58
27
50,001+
TOTAL
1 5l)4i
774029
3559
56647
528
4 95
0.06
43846
-------
L-0-
yS^J2<.
j CI -4.
c£-
TABLE 3-9
GVW
0 - 6,000
0 - 6,000
0 - 6,000
0 - 6,000
6,001 - 10,000
6,001 - 10,000
6,001 - 10,000
6,001 - 10,000
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS BY GVW AND AREA OF OPERATION
GASOLINE VEHICLES
AREA OF
OPERATION
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
_FREQ_
r
l«50,'Ss
7904/ '*
817'
140
STOCK
1801209
14490124
1614589
323881
SIGSTOCK
<*<<206
128401
i 46117
V 18387
AVEVMT
6437
9087
12790
12635
SIGVMT
4(f4
164
777
2315
AVEMPG SIGMPG
13.22
14.26
14.30
14.74
1 .14
0.37
1 .22
3.74
TOTVMT
(MILLIONS)
11594
131670
20651
4092
OFF ROAD 1225 864970 u<),733912 9055 783 10 76 1.32 7833 - _
LOCAL 10259 ^ T'33 880207 0 *192246 10834 238 10 89 0.36 95363
SHORT RANGE 1628 . ! 36 2678 f&^3ee39461 13805 801 11 12 0.88 18812 , ' 3
LONG RANGE 358 . i O^T. 41 27 53 in 22235 13178 1271 11.44 1.53 5439 ,//£>l
> T \/ I
y
7 >
z. 3>^s~o
/ /<3<£.
10,001 -
10.001 -
10.001 -
10,001 -
14,000
14.000
Is.000
14.000
Of 1 ROAD
L OLAL
->HOR T RANGE
LONG RANGE
1 56
455
64
7
- 15565 = 676
,1V*® 4 5922 "3>5bi31184
.i&iH 7393 970,9 427
l0626 543 157
2742
5596
13439
6472
785
413
2228
2429
9 24
7 68
8 26
9 08
3 23
0 77
2.64
2.55
43
257
99
4
,C> 2.7£>
. Zci
/oy
3o
14,001 -
14,001 -
14,001 -
14,001 -
16,000
16,000
16,000
16,000
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
324
1441
224
40
30157 869
147078 n-"n^ 2271
.i&eo 25239 820
5536 247
2612
7090
13669
8101
291
286
1189
606
7 .55
6.71
6 .44
8.98
1 .14
0.38
1 .06
3.18
79
1043
345
45
•t-15 2.
, Ik I 1
> oS5 /
31 (*
$ -5
16,001 -
16,001 -
16,001 -
16,001 -
19,500
19,500
19,500
19,500
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
678 „ 64734 1111
26 02 .1*^1 256128 Z^^c©'l2307
301 28325 851
48 , o@MO 3356 2Hi6l 282
3251
6420
13256
12803
214
188
1049
3531
6 .92
6 .68
6 .55
7 .20
0.82
0.27
0 .72
2.65
210
1644
375
43
, t
-
' I 2
" ' Y ij
'W 2 9
'S
/ 6 B
19,501 -
19,501 -
19,501 -
19,501 -
26,000
26,000
26,000
26.000
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
1683
7454
1051
155
„ 146788 1729
.Kit- 718706 6796
, 95819 1 -SiW°M530
. o&®l 14052 1 ^ 629
4181
8214
15151
15565
169
160
608
1816
6.18
5.84
5.80
5.73
0.36
0.15
0.33
0 .98
614
5904
1452
219
~ CTS* I
S 2. -2-35"
. o97V
e/vy
1 Z>6
26,001 -
26,001 -
26,001 -
26,001 -
33,000
33,000
33,000
33,000
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
342
1767
318
39
18436 596
,1 iG>l 103120 <332^61412
,.907 18553 2.3
. ZSZG
. i o>
nz I ,
2
'Cr.O
33,001 -
33,001 -
,33,001 -
33,001 -
50,000
50,000
50,000
50,000
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
365
1170
126
33
19310 566
,-T5-Co& 67339 10 2 3
. i 1*0 7504 i i "5-St. ^12
.oz>ZZ 1700 "7jS"'e> 174
5783
8599
16934
11093
953
366
2220
2448
4.97
4.65
4.80
5.11
1 .09
0.32
0.86
1 .69
112
579
127
19
/ Ti lO
. c>35Z
i*3
50,001+
50,001+
50,001+
50,001+
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
19
122
30
11
r, 873 „ 65
. 6662 66-2.3 338
.11 C-3 1610 i 146
, iae5 521 i 57
7649
12953
25380
95892
3663
1858
4890
27575
3.65
3.88
5.05
3.18
2.41
0.80
1 .62
1 .64
7
86
41
50
, -/ ST-O
.2.336
i
/
V5
52
-------
000
000
000
000
. 000
, 000
, 000
, 000
, 000
, 000
,000
, 000
. 500
, 500
,500
,500
,000
,000
,000
,000
,000
,000
, 000
,000
, 000
, 000
,000
, 000
TABLE 3-10
AREA OF
OPERATION
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS BY GVH AND AREA OF OPERATION
DIESEL VEHICLES
_FREQ
5
90
11
6
STOCK
14027
228123
13488
12658
SIGSTOCK AVEVMT
5492
15697
2299
2294
14730
17548
15549
25502
SIGVMT
8356
2220
3734
13873
AVEMPG SIGMPG TOTVMT
35.07
21.36
17 .49
18.68
24.12
3.69
8.26
14.06
(MILLIONS)
%
1 ~>
n i'
207
4003
210
323
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
81 ,1^156
33 , |-79^
11 .HOT
537
19573
3383
2126
143
I-? <=>3° 2010
257
146
18653
13077
30387
29853
9522
2384
5048
8681
8.09
12.58
10.34
10.42
4 71 z' 10 Z-3'
4.03 2 3c. 256 55>.
2.40 hi 103 Z-J &o3 I 3914 3453 251
16 , 1458 177
4 ,n 307 1
9967 4880 5.30 4.11 ' 4 3,/^
16752 2371 7.52 1.51 66 Si.lL>
34487 8434 8.71 3.03 hQ, 50
30582 2940 7.92 3.57 /u, 9 <,,3*S
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
85 6491 395
549 . r<-li 41270 992
260 «3»-W 20527 Zcejo 649
49 . 3826 1©67 278
11398
17489
28009
46970
1825
947
1791
7 354
6 .72
7 .06
6 .96
7.32
1 .55 ,LU 7 4
0 57 ~""k'7b 722 VU JT
0.74 55"<- 575 3~>- o7
1 . 56 180 ' /- 015 113119 1^,^1443 19643 566 6.38
739 ,?1oo 41889 ^35^880 34705 1368 6.46
219 , l7ef? liC,9S <,°tt 52420 3518 5.72
102
0.95
0.26 -'"'S 2222
0.35 1454
0.55 131 602
•2 . "33
:5c. "7 3
3 3.W
/ 3
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
474
2651 ~
1130 • >- Uoo
831 ,mj(,
22108 705 12484 1344 4.82
1424931Z6GEJ1673 19163 518 5.13
58534 t»"}"}?Vl019 41006 1450 5.44
44179 52.<.*3 823 79133 2828 5.22
0.74
0.19
0.27
0.25
j-^27 6
Z'H 2731
2 7^ 2400
j 3 3496
0.40 652
0.13 =>• >1 7624
0.11 0-^0313134
0 . 08
3 .' o
"15>,2 7
OFF ROAD
LOCAL
SHORT RANGE
LONG RANGE
663 30951 799 21056
4936 247518?4fc->632073 30802
4787 .3203 231957 2."3 £32015 56621
5362 , 253282 2^5 1*2,70! 8 06 87750
1307
583
896
1090
4.74
4 .88
5.01
4 .96
Zo"(
Ys22226
n-Vn
i 1 o
sv
-------
percent) are operated over long distances. This predominant usage is
characteristic of all of the weight categories considered in the anal-
ysis. Within the local area, there appears to be no significant differ-
ence among the average annual mileages recorded by gasoline trucks of
different weight categories. However, within both the short and long-
range areas of operation, there is clearly a trend of increasing average
annual miles per truck with increasing GVW.
With respect to diesels, roughly 50 percent are operated in the local
area, 21 percent are engaged in long-range travel, 6 percent are used
off-the-road, and 23 percent are employed in short-range applications.
As with gasoline-fueled trucks, the local area of operation is the
primary mode for all diesel truck weight categories with one exception.
In the 50,001+ lb GW class, 33.2 percent of the trucks are used in
long-range applications while 32.4 percent are used in the local area.
A comparison of data from Tables 3-8 and 3-9 shows that within each
weight and area of operation category, diesels are operated more inten-
sively and are more fuel efficient than their gasoline-fueled counter-
parts. For instance, within the local area, Class 1 diesel vehicles
achieve 21.9 mpg and accumulate an average yearly mileage of 17,548 miles
in contrast to 14.26 mpg and 9,087 miles for a Class 1 gasoline LDT.
Similarly in the 26,001-33,000 lb GVW/long-range category, diesels
accumulate an average 52,420 miles per year with an average efficiency of
5.72 mpg in contrast to 4,92 mpg and 23,129 miles per year for a
gasoline-fueled counterpart
3.7 COMPARISON WITH THE 1977 TIUS
As indicated earlier in Section 2, substantial effort was devoted to
cleaning and reclassifying the records in the 1982 TIUS on the basis of
gross vehicle weight. This level and scope of effort was not expended in
3-52
-------
previous EEA analyses of the 1977 TIUS public use computer tape. As a
result of the use of different methodologies, a direct comparison of the
total vehicle counts from the two surveys would produce misleading
conclusions. It is possible, however, to draw some comparisons con-
cerning trends in the distribution of trucks and truck characteristics
between the 1977 and 1982 TIUS.
Table 3-11 shows, for example, the distribution of trucks in use by area
of operation, GVW class and survey year. Between 1977 and 1982, within
almost all of the gross vehicle weight categories under 50,000 lbs, the
percentage of trucks operated in the local area dropped significantly at
the expense of increases in the shares of trucks used in short range and
off-road applications. The 50,001+ GVW weight category was the only one
which did not exhibit any significant shift between 1977 and 1982 in the
distribution of trucks by area of operation.
Between 1977 and 1982, the diesel share of trucks in use in the local
area increased from 2 percent to 3.2 percent while the diesel share of
total miles traveled in the local area nearly doubled (see Table 3-12).
This is attributable to increasing numbers and average annual miles
traveled of diesel powered light duty trucks which are operated primarily
in the local area. Table 3-12 also shows that the diesel share of trucks
that are operated in long-range applications fell from 40.5 percent in
1977 to 30.5 percent in 1982 even though the diesel share of total long
range VMT remained relatively unchanged. This is due to the fact that
even though there was an increase in light-duty trucks operated in
long-range uses, this was more than compensated by the significantly
higher average annual distance traveled by diesel heavy-duty vehicles
over 50,000 lbs. (See Table 3-13.)
3-53
-------
TABLE 3-11
TRUCKS BY AREA OF OPERATION, GVW CLASS AND SURVEY YEAR
(Percent)
Area of Operation
GVW Class
0-6,000
6,001-10,000
10,001-14,000
14,001-16,000
16,001-19,500
19,501-26,000
26,001-33,000
33,001-50,000
50,001+
Survey
Year
1977
1982
1977
1982
1977
1982
1977
1982
1977
1982
1977
1982
1977
1982
1977
1982
1977
1982
Local
89.1
79.7
82.9
73 8
76 1
68.6
77.5
70.7
75.1
69.9
76.9
70 8
74 7
71.9
66 8
61- 8
35.3
34.6
Short
Range
6.5
9.3
9.8
11.6
10.4
12.0
7.4
11.9
9.3
12.5
9.8
11.7
14.4
12.3
16.8
17.6
32 8
29.7
Long
Range
0.9
2.1
2.1
3.2
4.0
5 4
1.1
4.1
4.2
2.7
1.9
1.5
2.0
2.7
6.5
9.8
28.4
31.0
Off
Road
3.5
8.9
5. 2v
10.1
9.5
13.2
13.9
13.3
11.3
14.9
11.4
16.0
8 9
13.1
9 9
10.6
3 5
4.4
TOTAL
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
3-54
-------
TABLE 3-12
DIESEL PENETRATION RATES BY AREA OF OPERATION AND SURVEY YEAR
(Percent)
Penetration of Trucks In-Use
Area of Operation
Survev Year
Local
Short Ranee Lone Ranee
Off-Road
1977
2.0
13.2 10.9
3.3
1982
3 2
10.6 30.5
2.9
Penetration of Vehicle-Miles
Area of Operation
Survev Year
Local
Short Ranee Long Ranee
Off-Road
1977
3.9
31.3 74.5
8.0
1982
7.0
29.7 73 4
6.2
3-55
-------
As shown in Table 3-13, there were significant reductions in the average
annual miles traveled per truck between 1977 and 1982 for gasoline-fueled
vehicles in all weight categories under 50,000 lbs GVW. The decline
appeared to be especially significant for gasoline trucks in the 10,001-
16,000 lb GVW classes which dropped from 11,017 miles to 6,895 miles per
year. This drop was, however, expected given that the sales of new
trucks in the 10,000-16,000 lb category has been negligible over the past
few years --a factor leading to the progressive aging and decline in use
of this truck segment.
The average VMT of diesel trucks under 6,000 lbs jumped from 8,800 miles
to 17,700. miles between 1977 and 1982. In contrast, the average annual
VMT of diesel trucks in the 16,001-50,000 lb category dropped by about 7
percent between 1977 and 1982. There were no significant changes in the
annual average VMT of diesels in any of the other weight categories.
Table 3-14 presents trends in the average fuel economy of trucks in use
by GVW class and fuel type. With respect to gasoline, there was a
significant increase from 1977 to 1982 in the average fuel economy of
trucks in the 0-6,000 lb class. This increase from 12.4 mpg in 1977 to
14.2 mpg in 1982 reflected the impact of the Corporate Average Fuel
Economy Standards for light trucks. Conversely, for gasoline trucks at
the heavier end of the spectrum (i.e., over 16,000 lbs GVW), there has
been no growth in fuel economy as manufacturers have focused on improving
the fuel efficiency of the expanding diesel segments of these weight
classes. As a result of this focus, the fuel economy of diesel trucks in
the 50,001+ lb GVW class increased 8.7 percent from 4.6 mpg in 1977 to
5.0 mpg in 1982. The average fuel economy of diesel light trucks under
6,000 lbs also rose dramatically from 9.0 mpg in 1977 to 21.7 mpg in 1982
3-56
-------
TABLE 3-13
AVERAGE ANNUAL MILES PER TRUCK
BY WEIGHT CATEGORY, FUEL TYPE AND SURVEY YEAR*
6,001- 10,001- 16,001- 50,001 and
0-6.000 10.000 16.000 50.000 over
Survey
Year gas diesel gas dlesel gas diesel gas diesel gas diesel
1977 10.542 9,801 11.726 15,283 11,007 20,175 10,377 27,931 17,044 57,697
(111) (2,291) (225) (3,973) (437) 5,608) (131) (734) (817) (832)
1982 9,216 17,676 11,138 16,872 6,895 17,761 8,241 25,953 19,013 57,136
(159) (2,103) (220) 2,544) (325) (3,643) (198) (702) (2,604) (533)
NOTE: Numbers in brackets are standard errors.
* Note that the 1982 TIUS GVW classes 3 and 4 and 5, 6, 7 and 8A were
aggregated into two separate categories to facilitate a comparison with
the results of an earlier EEA analysis of the 1977 TIUS.
-------
TABLE 3-14
AVERAGE FUEL ECONOMY OF TRUCKS IN-USE
BY GVW CLASS, FUEL TYPE AND SURVEY YEAR**
Weight Category
6,001- 10,001- 16,001- 50,001 and
0-6.000 10.000 16.000 50.000 over
Survey
Year gas diesel gas diesel gas diesel gas diesel gas diesel
1977 12 4 9 0 10.7 9.6 8 3 8.4 5 5 5.0 3.9 4.6
(0 2) (2.9) (0.3) (3.2) (0.5) (4.2) (0.1) (0.2) (0.3) (0.1)
1982 14.2 21.7 10.9 11.5 7 0 8.2 5.8 5.7 3.8 5 0
(0.4) (3.4) (0.3) (2.5) (0.5) (2.4) (0 2) (0.2) (0.9) (0.1)
NOTE: Number in brackets are standard errors
Note that the 1982 TIUS GVW classes 3 and 4 and 5, 6, 7 and 8A were aggregated into two
separate categories to facilitate a comparison with the results of an earlier EEA analysis of
the 1977 TIUS.
-------
as manufacturers sought to meet CAFE regulations in the late 1970's and
early 1980's with the introduction of new diesel versions of light duty
diesel truck models such as the S-10, Blazer, etc.
3-59
-------
REFERENCES
1. Motor Vehicle Manufacturer's Association, Facts & Figures '86.
2. U.S. Department of Commerce, Bureau of the Census, 1977 Census of
Transportation. Truck Inventory and Use Survey: United States.
TC77-T-52.
3 U.S. Department of Commerce, Bureau of the Census, 1982 Census of
Transportation. Truck Inventory and Use Survey: United States,
TC82-T-52.
4. Energy and Environmental Analysis, Inc., "Motor Fuel Consumption
Model: Twelfth Periodical Report," prepared for the U.S. Department
of Bnergy, October 1985
R-l
-------
APPENDIX A
1982 TRUCK INVENTORY AND USE SURVEY
DETAILED TABLES
A-l
-------
APPENDIX A.1
REGISTRATION FRACTIONS BY WEIGHT CATEGORY,
FUEL TYPE AND VINTAGE
A-2
-------
1982 TRUCK INVENTORY AND USE SURVEY 1
REGISTRATION FRACTIONS BY VINTAGE FOR 0-6,000 lbs CVl'1
FUEL= Gasoli ne
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.031
571821
25836
2
0.051
937682
30830
3
0.058
1055948
38111
4
0.076
1389757
39168
5
0.070
127 0841
38436
6
0.062
1133818
36 359
7
0.071
1345393
38337
S
0 051
938589
32864
9
0 . 067
1583674
41302
10
0 . 070
1282178
36224
10 +
0 369
6720102
88861
ALL
I .000
18229803
144753
fuel = Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.339
90936
11315
2
0.287
76874
7914
3
0.141
37729
7417
4
0.146
39249
5878
5
0.080
21331
2358
6
0.000
74
7
0.005
1294
0
10 +
0.003
810
143
ALL
1 .000
268296
17537
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 6,001 - 10,000 1bs GVU
2
FUEL=Casoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0 .030
348538
22829
2
0 .061
703657
30313
3
0 .058
664549
<24250
4
0.163
1860227
43171
5
0 171
1956952
4 38:13
6
0 .144
1651974
42129
7
0 .082
943559
30192
8
0 052
598520
23520
9
0 .046
525363
21864
10
0 041
469673
21029
10 +
0 .150
1719457
41195
ALL
1 .000
11442470
108315
FUEL = Di esel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.329
8429
1243
2
0 .045
1143
181
3
0.065
1656
55
4
0 .173
4426
121
5
0.152
3887
69
6
0.013
325
90
7
0.008
210
20
8
0.007
170
9
0.029
740
42
10
0 .031
796
69
10 +
0 .150
3838
305
ALL
1 .000
25620
2541
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 10,001 - 14,000 lbs GVW
3
fuel= Gasoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.016
1093
176
2
0.021
1455
172
3
0.023
1585
190
4
0.051
3534
300
5
0.019
1320
200
6
0.041
2856
302
7
0 007
519
116
8
0.013
879
159
9
0 010
680
146
10
0 Oil
797
163
10 +
0 788
54704
1286
ALL
1 .000
69423
1441
fuel = Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.013
152
66
2
0.043
521
110
3
0.064
777
143
4
0 . 325
3944
99
5
0.052
634
97
6
0.002
24
,
7
0.068
824
118
8
0.129
1558
no
9
0.132
1598
0
10
0.015
180
10 +
0.158
1914
240
ALL
1 .000
12127
1506
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 14,001 - 16,000 1bs GVW
fuel = Gasoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.003
685
151
2
0.011
2268
166
3
0 . 008
1604
142
4
0.022
4547
318
5
0.035
7222
420
6
0.021
4355
313
7
0 . 028
5909
380
8
0 . 048
10075
461
9
0 054
11140
579
10
0.062
12954
586
10 +
0 .708
147250
3000
ALL
1 .000
208010
3369
-------
1982 TRUCK INVENTORY AND USE SURVEY 5
REGISTRATION FRACTIONS BY VINTAGE FOR 16,001 - 19,500 lbs GVU
fuel= Gasoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.004
1359
195
2
0.007
2407
266
3
0.014
4868
268
4
0.018
6358
410
5
0.022
7746
352
6
0.028
9908
519
7
0.036
12535
558
8
0.034
12156
532
9
0. 046
16305
576
10
0. 050
17802
641
10 +
0.741
261099
36 07
ALL
1 .000
352543
3945
fuel= Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
2
0.199
1214
78
3
0.158
968
132
4
0.061
375
40
5
0. 066
402
36
6
0. 043
261
0
7
0. 058
354
148
8
0.069
419
62
9
0.019
118
10
0. 034
206
\J )
10 +
0 293
1791
18U
ALL
1.000
6108
322
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 19,501 - 26,000 lbs GVW
6
FUEL= Casoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.
006
5818
350
2
0.
010
9581
530
3
0.
021
20842
.666
4
0.
069
67466
1245
5
0 .
059
57771
1157
6
0.
073
70978
3868
7
0.
064
62833
1216
8
0.
087
84674
1343
9
0.
085
82967
1292
10
0.
090
87690
1420
10 +
0 .
435
424743
3801
ALL
1.
000
975364
7257
fuel= Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0
. 041
2926
275
2
0
.110
7907
377
3
0
.136
9820
445
4
0
.160
11530
458
5
0
.112
8087
418
6
0
.085
6127
342
7
0
.039
2793
237
8
0
.045
3261
301
9
0
.037
26 50
26 7
10
0
.034
2431
220
10 +
0
.202
14582
646
ALL
1
.000
72114
1285
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 26,001
fuel = Gasoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.032
<•529
295
2
0.085
12152
528
3
0.112
15927
591
4
0.09L
12942
507
5
0.061
8702
403
6
0 .050
7087
366
7
0.035
5055
320
8
0 .050
7130
320
9
0 .052
7443
313
10
0 .059
8420
401
10*
0 37*
53320
1020
ALL
1 .000
142707
1678
7
- 33,000 lbs GVW
fuel- Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.06 3
11058
470
2
0 .160
28158
764
3
0 .134
23600
651
4
0 .130
22869
672
5
0 .106
18655
534
6
0 . 082
14361
450
7
0.038
6695
359
8
0.042
7451
347
9
0 .048
8367
320
10
0.051
9045
410
10 +
0.146
25700
688
ALL
1 .000
175959
1796
-------
1982 TRUCK INVENTORY AND USE SURVEY 8
REGISTRATION FRACTIONS BY VINTAGE FOR 33,001 - 50,000 lbs GVU
fuel= Gasoline
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.005
496
27
2
0.014
1356
144
3
0.022
2135
166
4
0.055
5290
288
5
0.041
3911
269
6
0.035
3380
239
7
0.042
4039
231
8
0.086
8200
408
9
0.098
9403
397
10
0. 079
7553
345
10 +
0.523
50091
2755
ALL
1 . 000
95853
3262
fuel- Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.022
5892
281
2
0.053
14266
516
3
0.067
18035
563
4
0.112
29865
740
5
0.099
26500
750
6
0.079
21012
608
7
0.046
12170
482
8
0.06 3
16715
551
9
0.086
22908
654
10
0.084
22448
652
10 +
0.290
77504
1235
ALL
1.000
267314
2265
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR 50,001+ lbs GVW
fuel= Gasoli ne
AGE
REGFRAC
1
0.016
2
0. 018
3
0.024
4
0.033
5
0.027
6
0.015
7
0.030
8
0.099
9
0. 089
10
0.094
10 +
0.554
ALL
1. 000
STOCK
SIGSTOCK
155
12
170
0
236
25
324
67
264
47
144
60
290
36
957
118
864
65
909
64
5354
280
9666
381
fuel= Diesel
AGE
REGFRAC
STOCK
SIGSTOCK
1
0.043
32971
653
2
0.073
55955
908
3
0.101
76837
1086
4
0.141
107526
1312
5
0.110
83828
1168
6
0.103
78610
1229
7
0 044
33877
732
8
0.057
43753
831
9
0.079
60109
968
10
0.068
51763
877
10 +
0.181
138480
1520
ALL
1 .000
763708
3536
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE
(ALL TRUCKS UNDER 10,000 LBS GVW)
AGE
FRACTION
STOCK
SIGSTOCK
IN USE
1
0.036
980775
35913
2
0 059
1611957
42430
3
0 060
1640714
44215
4
0.115
3135243
57142
5
0.111
3041713
56000
6
0.095
2605574
52790
7
0 077
2087389
46649
8
0 051
1 V)0 ^82
37560
9
0 071
1 <> ro II1 4
44554
1 0
0 Oi>7
1568649
39876
1 Ot
0 267
7 297 00 7
91538
ALL
1 000
27285447
172960
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE for Light Duty Vehicle
(UNDER 10,000 LBS GVW)
FUEL =GASOLINE
AGE
REGFRAC
STOCK
SIGSTOCK
1
0
033
882442
33919
2
0
05?
1542362
42012
3
0
059
1606243
43592
4
0
1 1 4
3091569
56737
5
U
1 1 2
3016495
55907
0
0
U')6
260517 5
52790
1
U
U/ /
2085885
46621
a
0
051
1390213
37560
9
0
0/1
1925395
44554
1 0
0
058
1567853
39876
10t
0
270
7292464
91537
ALL
1 .
.000
27006095
172117
FUEL r DIESEL
AGE
REGFRAC
STOCK
SIGSTOCK
1
0
352
98333
11434
2
0
249
69595
5941
3
0
124
34501
7380
4
0
156
43675
5885
5
0
090
25219
2573
6
0
001
399
95
7
0
005
1504
67
8
0
001
170
9
0
002
619
38
10
0
003
796
69
10 +
0
016
4543
317
ALL
1
000
279352
16935
-------
1982 TRUCK INVENTORY AND USE SURVEY
REGISTRATION FRACTIONS BY VINTAGE FOR HEAVY DUTY VEHICLES
(OVER 10,000 LBS GVU)
FUEL-GASOLINE
AGE FRACTION STOCK SIGSTOCK
IN
USE
1
0
.oos
12833
535
2
0
017
26565
833
3
0
027
4 2 7 7 1
925
4
0
05a
90725
1438
5
0
050
77873
1308
6
0
0 5 7
86144
3929
7
0
05 1
80191
1378
a
0
0 7 1
110612
1537
9
0
0 72
112154
1513
1 0
0
0 76
119004
1660
10 +
0
512
796832
6635
ALL
1
.000
1557 7 04
9345
>
FUEL=DIESEL-
AGE FRACTION 5TOCK SIGSTOCK
IN USE
1
0 . 041
50993
896
2
0 . 084
102794
1311
3
0 . 102
125873
1454
4
0 139
171044
3343
5
0.109
133598
1519
6
0 093
114813
1450
7
0 044
54345
971
8
0 . 056
68606
1482
9
0 07 3
89718
1209
10
0 . 066
81637
1156
10 +
0 . 192
235891
2074
ALL
1.000
1229311
5562
-------
APPENDIX A. 2
STOCK, VMT, AND MPG BY WEIGHT
CATEOGRY, FUEL TYPE AND VINTAGE
A-15
-------
1
2
3
4
5
6
;
H
V
1 u
1(J
1
2
3
4
5
6
7
10
48
62
08
23
58
13
32
02
09
61
85
36
39
23
64
02
19
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT. AND MPG ANALYSIS
0 - 6.000 LBS GVW
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
CASOLINE
233
55OSZ0
2566 5
16576
1646
26.83
CASOLINE
3 58
882022
30284
14478
904
16.44
GA50LINE
355
977054
36583
14250
1000
17.98
GAGOLINE
5^i 2
1323977
38069
11197
573
15.29
(¦A'.tlL I HE
457
1175355
36852
11091
666
15.30
i.A',01 1 ME
500
1056202
34645
11438
816
14 30
(.A .in 1 111
480
1234100
36447
10131
596
13.18
<¦/. -ill 1 III
3 59
846723
30755
9482
695
12 85
.Ill 1 III
567
1434860
39023
9366
522
12 71
<.A .1)1 [III
505
1144471
34826
8046
485
12 53
U'jUI IIJL
4525
5803011
83300
6457
207
13.24
DI L j L L
35
90252
1086 0
19240
4205
22 66
D1fcSEL
28
68452
5937
22789
4196
27 . 16
D1ESEL
13
32845
7195
16186
546 3
17 .62
DItSLL
11
39249
5878
12848
2469
16.49
DIEStL
9
21331
2358
8688
2562
11 .36
DIEStL
1
74
15000
a. oo
DIES! L
2
1294
0
5317
0
15. 34
DIEStL
8
773
142
13063
4899
14.54
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS
6.001 - 10.000 LBS GVM
AGE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
1
uaooiiMr
344
331623
21996
19643
2311
12.29
1 .92
2
(.A ,01 I HE
698
660339
29104
16113
1353
11 48
1 40
3
I.A >01 I HE
813
629189
23109
14699
999
10 89
1 . 09
<<
UAMII 1 HE
1 569
1767592
41951
13011
618
10 98
0 74
!>
UASOL 1NL
1 542
1841140
41860
11583
468
11.55
0.68
6
GASOlINC
1288
1548974
39745
11392
560
11.19
0 82
7
GASOI I HE
784
851785
28949
10605
786
10.72
1 .15
8
GASOL1 HE
665
543490
21425
9313
896
10 43
1 .43
9
GASOL JNE
839
490535
21487
8 546
777
9.73
1 . 34
10
GASOL1NE
684
423382'
19287
7835
645
10.26
1 .26
10 +
GASOLINE
3019
1489452
37669
6470
417
9.47
1 .12
1
DIESEL
44
8081
1239
20426
4397
13 13
3 99
2
DIESEL
13
1143
181
26593
7890
11. 56
3.82
3
DIESEL
5
1656
55
17780
4522
8.89
3.87
4
DIESEL
6
4426
121
17412
1518
14.08
9.79
5
DIESEL
4
3887
69
11381
531
11.71
8.04
6
DIESEL
3
325
90
19476
13460
11.90
8.90
7
DIESEL
2
210
20
24858
7264
9.32
2.70
8
DIESEL
I
170
20000
4.80
9
DIESEL
6
619
38
15013
4388
8.36
3.40
10
DIESEL
6
796
69
926 3
2121
7 .07
3.45
10 +
DIE'JCL
35
3770
28 3
11786
2757
9.53
4.30
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMt, AND MPG ANALYSIS
10,001 - 11,000 LBS GVW
Al>L
1 ULl
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
1
GASOL INC
7
786
166
17334
6836
9 51
4 58
2
GASOLINC
1 1
1219
165
14253
3014
7 . 34
1 .92
3
GASOLINE
17
1504
190
10734
2445
7 .28
1 . 90
>
4
GASOL1NL
36
3362
295
15901
4340
7 . 36
2.49
I—1
5
GASOLINE
13
1320
200
17415
4952
7 .42
2.74
00
6
GASOLINE
30
2856
302
13440
2526
7 . 54
1 .67
7
GASOL ItlE
3
363
86
13224
5832
9 32
4.05
8
GAS01INE
8
879
159
12640
3631
6.85
2.37
9
GASOLI ME
8
651
135
7545
2513
7 .68
3.53
1 0
GASOLINE
7
672
163
5726
2766
6 .95
4.71
10*
GASOLINE
386
40247
1104
4303
339
8 .22
1 .41
1
DIESEL
2
152
66
55532
3B049
12.70
9.67
2
DIESEL
5
521
110
36319
16860
13.69
8 01
3
DIESEL
8
611
124
2396 3
6774
9.39
3.47
4
DIESEL
10
3837
84
21112
2973
7 .07
4.33
5
DIESEL
5
601
35
28482
5511
10.67
5.10
6
DIESEL
1
24
12000
10 .00
7
DIESEL
9
824
118
25626
7454
10.29
3^75
8
DIESEL
5
1558
110
14251
1963
5.60
3 .89
9
DIESEL
1
87
21000
5.90
1 0
DIESEL
1
180
11500
.
10.90
,
10 +
D1ESLL
19
1581
21 i
11543
3101
8.38
3.66
-------
1982 TRUCK INVENTORY AND U5E SURVEY
STOCK, VMT, AND MPG ANALYSIS
14,001 - 16,000 LBS GVW
AbL
FULL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
1
GASOLINE
7
634
147
26895
14251
5 09
3 97
2
GASOLINE
16
2215
166
16323
4057
7 35
2.31
3
GASOLINE
14
1493
99
20033
3593
7 12
2.28
4
GASOLINE
44
4 390
310
11607
1600
5.93
1.15
5
GASOLINE
52
6788
390
14415
1829
6.35
1 .48
6
GASOLINE
39
4100
304
17920
4144
6.33
1 .94
7
GASOLINE
51
5298
36 3
10979
1545
6.25
1 . 32
8
GASOl1NE
97
9563
450
9615
1048
6 35
1 . 06
9
GASOLINE
99
9956
537
11032
1821
6.02
1 71
10
GASOLINE
118
12251
56 5
9351
1028
6 68
0.99
10 +
GASOLINE
1 168
121164
289 3
6212
373
7 .06
0 61
1
DIESEL
2
116
0
47653
0
10.21
5.11
2
DC ESEL
3
354
82
44425
17151
11.15
5.50
3
DIESEL
5
550
41
17393
59 36
11.79
6 92
4
DIESEL
10
862
158
17386
4366
9.19
3.29
5
DIESEL
3
409
41
14980
2933
7 83
3. 18
6
DIESEL
1
46
15000
10.10
7
DIESEL
2
164
0
21235
0
8 . 42
4^89
8
DIESEL
1
48
70000
3. 50
10
DIESEL
2
218
0
556
6
4.41
2 .67
10 +
DIESEL
9
801
165
7971
3399
6 .42
4.15
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS
16,001 - 19,500 LBS GVW
>
AGE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
ro
1
GASOLINE
11
1240
195
20360
5415
6 37
2.11
O
GASOLINE
22
2407
266
16413
4045
6 52
2.12
3
GASOLINE
45
4771
237
13987
1592
6.13
1 .12
4
GASOLINE
73
5799
386
15951
2384
6.71
1 . 38
GASOLINE
68
7353
334
14514
1847
6.67
1.10
6
GASOLINE
88
8974
497
14030
1724
5.82
0.97
7
GASOLINE
1 1 1
11420
532
10807
1161
6 .49
0.95
8
GASOLINE
1 16
11210
502
11387
1346
6.46
1 . 04
9
GASOLINE
1 50
14649
551
10422
1056
6.42
0.90
10
GASOLINE
162
16109
608
10291
1039
6.74
0 91
10 +
GASOLINE
2105
203878
2053
5085
182
6.91
0.35
2
DIESEL
1 1
1214
78
27448
5588
7 .97
2 31
3
DIESEL
1 3
968
132
25380
5912
9.17
3.22
4
DIESEL
4
37 5
40
57417
19688
8.23
4.38
5
DIESEL
3
402
36
22580
3314
9.11
1 31
6
DIESEL
1
96
0
0.00
.
7
DIESEL
3
354
148
19299
11107
8 20
4 .69
8
DIESEL
6
393
62
20153
6831
6 89
3.83
9
DIESEL
1
118
7781
7 .00
.
10
DIESEL
3
206
3
29052
2829
6 .29
2.62
lOt
DIESEL
21
1555
178
9729
2424
7 .04
2.45
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS
19,501 - 26,000 LBS GVH
AGE
FUEL
_FREQ_
STOCK
S1GST0CK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
1
GASOLINE
51
5315
328
16310
2242
6.78
1 .23
2
GA30LINE
86
8444
515
12821
1471
6.14
0.93
3
GASOLIHE
192
19892
644
14527
1064
6 08
0 . 59
4
GASOLINE
616
60909
1185
14294
678
5.68
0.39
5
GASOLINE
502
51154
1082
14363
846
5.81
0 44
6
GASOLINE
548
62251
3847
12783
1133
5.82
0.51
7
GASOLINE
544
54963
1152
10895
530
5.61
0 . 38
8
GASOLINE
789
75343
1271
9729
435
5.48
0.35
9
GASOLINE
785
71631
1192
9096
408
5.67
0.37
10
GASOL ItIE
787
74736
1318
8767
439
5.86
0.40
10 +
GASOIINE
57 6 0
343939
3582
5961
179
1^0
6 .08
0.27
1
D1ESEL
31
2685
267
22847
4249
8.75
2.21
2
DIESEL
87
7418
356
27557
3059
7.33
1.60
3
DIESEL
1 21
9350
437
27212
2934
8.19
1 .26
4
DlESEL
!'•*
11112
446
26150
1982
7.07
0.81
5
DIES!L
if,
7341
401
27916
3435
6.97
1 .32
6
DlrstL
>•')
5741
332
24890
3485
6.65
1 .36
7
D1 ESI I
2557
236
23753
4700
6.57
1 .88
8
DI E j L L
yi
2635
285
17613
3312
6.41
1 .63
9
Dirsi1
:z
2478
266
15743
3113
It 1>
5. 6B
1 .62
10
DlESLL
36
2334
218
15721
3018
6.33
1 .80
10 +
DIESEL
178
11770
578
11165
1624
6.01
1 .31
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT. AND MPG ANALYSIS
26,001 - 33,000 LBS GVW
AGE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
1
GA50LINE
62
4306
282
23328
3809
5.10
1 .09
2
GASOlINE
174
10867
501
16143
1551
5.18
0.61
3
c.AMll IKE
244
1 3114
522
15698
1286
5 13
0. 56
4
(.a .in iin:
213
11625
481
1 57 57
1425
5 05
0 58
5
in i hi:
118
7870
390
12608
1265
4.75
0.61
t,
l.A ,1)1 I in
1 I 5
6716
361
15018
1746
4 51
0.66
1
li.". .ill 1 111
80
4652
313
14693
2687
4 63
1 . 05
h
C,A ^1)1 1 III
109
6344
315
11760
1303
4 71
0.70
')
t,/r_>oi i in.
112
6968
309
10609
1064
4 52
0.64
1 0
OA SOI lilt
138
7954
397
11993
1649
4 .64
0.84
1 0 +
GASOL1HE
759
43857
914
7731
569
« 5 07
0 55
1
DIESEL
162
10509
463
29306
2518
9% 7-38
0.82
2
DIESEL
448
26988
750
26002
1415
7.17
0.51
J
DIEStL
40J
22745
63 9
25333
1500
7.03
0 .56
4
DIESEL
384
22167
6 58
29008
1870
6 .55
0.60
5
DIESEL
300
18379
526
27624
1770
5.88
0.55
6
DIESEL
2 22
137 36
4 36
28521
2151
5.75
0.62
7
DIESEL
107
6402
350
29361
37 51
5.59
0 .99
8
DIESEL
1 1 3
6792
312
21592
2098
5.42
0.78
9
DIESEL
144
797 5
313
25712
2431
5.64
0 78
10
DIESEL
1 56
8348
381
23312
2051
5.56
0.70
10*
DIESEL
4 58
22459
645
17944
1326
5.71
0.59
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS
33,001 - 50,000 LBS GVW
AGE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVHT
AVEMPG
SIGHPG
1
GASOlINE
7
421
25
12494
3320
5.67
2.27
2
GA30LINE
16
1244
133
18584
4266
5 31
1 .90
J
l./V'.Ol INE
34
1762
150
12258
2609
4 93
1 .43
I.A jUt INE
90
4315
250
15894
2893
4 54
1 . 16
b
(,A ,Ul INE
55
3201
259
13597
3342
4 90
1.63
b
i.AjUI INF
54
3104
2 34
12383
2109
4 86
1.11
7
OAjOLINI
56
3205
213
11043
2366
4 54
1 . 42
8
GA'jULINE
1 06
6385
354
8895
953
4 41
0 65
9
GASOLINE
1 39
7434
358
10925
1222
4 21
0.68
10
GASOLINE
1 16
6416
329
9732
1319
4.57
0.86
10 +
GASOLINE
6 56
39058
2717
7390
724
4.85
0.53
1
DIESEL
101
5642
27 4
56100
5567
5.41
0.75
2
DIESEL
258
12967
483
53185
4500 if/)
„ 5.51
0.65
3
DIESEL
325
16807
545
49186
3410 I
5. 35
0 . 51
4
DIESEL
536
27891
712
48178
2789
5.38
0.43
5
DIESEL
433
25054
719
48017
2883
5.28
0.44
6
DIESEL
3 36
19207
566
41085
2673
5.09
0 48
7
DIESEL
198
1 1331
458
42522
4100
5.30
0.69
8
DIESEL
262
1 5050
512
30150
2501
5.04
0.60
<)
DIESEL
388
216 38
627
28767
1781
5.04
0.44
10
DIESEL
38 3
20746
624
25059
1683
5.23
0.48
10 +
DIEStL
1 392
68872
1147
20039
899
5.12
0.33
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT> AND MPG ANALYSIS
50,000+ LBS GVW
AGE
FUEL
_rKEQ_
STOCK
SIGSTOCK
AVEVMT
SIGVHT
AVENPG
SIGMPG
1
f.A'-.ni [me
2
1 32
0
13412
0
3 81
1 .97
?
I'Amii iin
">
170
0
45631
0
5.00
2.92
i
t. A 1)1 | lit
X
236
25
21012
7555
4.77
2.42
l A III | III
6
324
67
48828
22320
4 B6
3 18
s
i.A .111 I lit
189
45
1 9768
7314
3 83
2 16
b
IjAjUI lilt
i
144
60
25630
14011
4 16
1 97
/
L.ASUL1NE
4
290
36
68399
35547
2.35
2.12
8
C.A SOI INE
17
889
118
27345
9725
4 66
2.54
9
GASOLINE
1 7
864
6S
12628
3440
3 42
1 54
10
GASOLINE
1 3
866
61
15620
3633
3.23
1 .44
10 +
GASOLINE
91
4689
275
15098
3092
ST.
4.21
1 .21
1
DIESEL
654
31889
640
93826
3563
5. 37
0 .28
2
DIESEL
1181
53332
866
82742
2316
5.21
0.19
3
DIESEL
1588
74842
1065
77789
2045
5.07
0.18
4
DIESEL
2207
104798
1289
70163
1536
4.98
0.15
5
DIESEL
U42
81412
1146
64568
1686
4.95
0.18
6
DIESEL
147 J
7 596 3
1206
61417
1759
f %
4.85
0 19
7
DIESEL
677
32712
711
55049
2390
4.87
0.28
8
DIESEL
847
41930
808
45965
1680
4.77
0.24
9
DIESEL
1121
57421
942
44123
1497
4.74
0.22
10
DIESFL
1008
49604
855
40995
1560
4.68
0.25
10 +
DIESEL
2687
128853
1451
32489
845
4.80
0.17
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS FOR ALL LIGHT DUTY DIESEL TRUCKS
UNDER 10,000 LBS GVkl
AGE
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
8IGMPG
1
79
98333
11434
19337
4022
21.32
6.18
2
41
69595
5941
22851
4132
26.48
7.47
3
18
34501
7380
16263
5424
16.76
6.96
4
17
4367 5
5885
13310
2278
16 .12
4 27
5
13
25219
2573
91 03
2276
11 .42
4.20
6
4
399
95
18647
11195
11.10
7 .07
7
4
1 504
67
8051
1520
11 .99
6 .29
8
1
170
20000
4.80
9
6
619
38
15013
4388
8 36
3! 40
10
6
796
69
9263
2121
7 .07
3.45
10 +
4 3
4543
317
12003
2434
10.18
4 02
I
ro
ui
-------
1
2
3
4
5
6
7
S
9
10
0 +
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS FOR LIGHT HEAVY DUTY DIESEL TRUCKS
(10,001 - 19,500 LBS GVW)
,FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
4
268
66
52113
21011
11 .58
6.78
19
2089
162
32539
6126
9.75
2.39
26
2129
207
22911
3854
9 .66
2.35
24
5075
208
23161
3417
7 .48
3.47
11
1412
72
22888
3423
9.56
2.59
3
167
35
5942
3207
10.07
8.02
14
1343
198
23421
5647
9.53
2.71
12
1 99")
130
16744
2364
5 51
2.90
2
205
0
13377
0
6 .23
3.28
6
604
52
13538
3279
6 .99
3.13
49
3937
328
10099
1780
7 .47
1.99
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT»
AND MPG
ANALYSIS FOR
MEDIUM
HEAVY DUTY
DIESEL TRUCKS
(19,501 - 50,
,000 LBS
GVU)
AGE
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGrtPG
1
29*
18836
60*
36*11
2351
6.40
0.59
2
793
47373
966
33686
1563
6 . 36
0 .45
3
847
48902
951
34146
1508
6.20
0 .*0
4
1063
61171
1069
37230
1507
5.86
0 . 3*
5
819
50774
979
37729
1646
5.58
0 . 35
6
627
38684
791
34220
1623
5.41
0 . 38
7
311
20290
625
36003
2667
5 46
0 . 56
8
41*
2467 7
666
26354
1687
5.21
0 *8
9
564
32092
752
27003
1372
5.20
0 37
10
575
31428
765
23902
1261
5.36
0 . 39
10 +
2028
103102
1443
18570
695
5.29
0.28
>
ro
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS'
50,000+ LBS GVW
ACE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEWPG
SIGMPG
1
GASOLINE
2
132
0
13412
0
3.81
1 .97
2
GASOLINE
2
170
0
45631
0
5.00
2. 92
3
GASOLINE
4
236
25
21012
7555
4.77
2.42
4
GAjULINE
6
324
67
48828
22320
4.86
3. 18
5
CAT>01 I NE
4
189
45
19768
7314
3.83
2.16
6
CASOlINE
3
144
60
25630
14011
4.16
1 .97
7
GAGOlINE
4
290
36
68399
35547
2.35
2.12
&
GA^Ot I HE
I 7
889
118
27345
9725
4 .66
2.54
9
GASOLINE
17
864
65
12628
3440
3 .42
1 .54
10
GASOLINE
13
866
61
15620
3633
3.23
1.44
10 +
GASOLINE
91
4689
275
15098
3092
4.21
1.21
1
DIESEL
651
31889
640
93826
356 3
5.37
0.28
2
DIESEL
1181
53332
866
82742
2316
5.21
0.19
5
DIESEL
1SB8
74842
1065
77789
2045
5.07
0.18
4
DIESEL
2207
104798
1289
70163
1536
4.98
0.15
5
DIESEL
1642
81412
1146
64568
1686
4.95
0.18
6
DIESEL
147 3
75963
1206
61417
1759
4.85
0.19
7
DIESEL
677
32712
711
55049
2390
4.87
0.28
8
DIESEL
847
41930
808
45965
1680
4.77
0.24
9
DIESEL
1121
57421
942
44123
1497
4.74
0.22
10
DIESEL
1008
49604
855
40995
1560
4 .68
0.25
10 +
DIESEL
2687
128853
1451
32489
845
4 .80
0.17
-------
AGE
1
Z
J
4
b
6
7
5
9
1 0
1 CM
1982 TRUCK INVENTORY AMD USE SURVEY
STOCK, VMT, AND MPG ANALYSIS FOR ALL HEAVY DUTY GASOLINE TRUCKS
(OVER 10,000 LBS GVU)
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGflPG
147
12833
535
19487
1875
5.86
0.84
327
2656.5
833
15 343
1014
5.76
0.53
550
<•2771
925
14827
701
5.74
0.40
1078
90725
1138
14 716
571
5.62
0.32
812
7 787 3
1308
14238
639
5.78
0.36
877
88U4
3929
13348
876
5.70
0.39
849
80191
1 378
11333
482
5.45
0.39
1212
1 1061?
1537
10120
365
5.50
0.29
1510
1 1 2101,
1513
9675
356
5.52
0 31
1 1<« 1
I 1900^
1660
9334
356
5 TJ
0 31
8 925
7968J2
6 6 \ c
5913
126
6.21
0.19
-------
1
2
3
4
5
6
7
8
9
10
10 +
1
2
3
4
5
6
7
8
9
10
10+
1982 TRUCK INVENTORY
AND USE
SURVEY
STOCK, VMT,
AND MPG
ANALYSIS FOR
10,001 -
19,500 LBS
GVH
FUEL
FREQ
STOCK
5IGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
GASOLINE
25
2660
300
21023
4708
6'. 39
2.15
GASOLINE
49
5842
362
15928
2382
6.97.
1. 36
GASOLINE
76
7768
368
14519
1480
6.51
0 . 99
GASOLINE
153
13552
587
14531
1578
6.64
0 .94
GASOLINE
133
15460
552
14718
1263
6 .59
0.87
GASOLINE
157
15930
660
14926
1526
6 .20
0.84
GASOLINE
16 5
17081
651
10911
922
6 .46
0.76
GASOLINE
221
21651
698
10655
851
6 .44
0.73
GASOLINE
257
25257
788
10588
950
6 .27
0 . 9 0
GASOLINE
287
29 0 32
853
9789
728
6.72
0.67
GASOLINE
3659
365289
4057
5373
177
7 .07
0.33
DIESEL
4
268
66
52113
21011
11 58
6 78
DIESEL
19
2089
162
32539
6126
9.75
2.39
DIESEL
26
2129
207
22911
3854
9.66
2 35
DIESEL
24
5075
208
23161
3417
7 .48
3.47
DIESEL
11
1412
72
22888
3423
9 56
2.59
DIESEL
3
167
35
5942
3207
10.07
8. 02
DIESEL
14
1343
198
23421
5647
9.53
2.71
DIESEL
12
1999
130
16744
2364
5.51
2.90
DIESEL
2
205
0
1SS77
a
& .2S
S.2&
DIESEL
6
604
52
13538
327 9
6 .99
3.13
DIESEL
49
3937
328
10099
1780
7.47
1 .99
-------
APPENDIX B
U.S. BUREAU OF CENSUS ANALYSIS OF OLDER VEHICLES
IN THE 1982 TIUS
B-L
-------
cumin tMreELL M,E isioer #*fcr "l!
iumiEn oi fiuiTi, tviktu tkiiit'i "Hi i,t»e m li s
ptw rnnoii m i uti Mff Bi t>oss vfHiui n hhi hi _
•jjiiii viiifi --u.s.
H06EL *1(6 t«W ttUHDlB 0 1 **fc »*4
iim lauus AhHUfti uri
HI Hi
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0-6000
00
1
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0 .00
0 -71
4 i
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50H
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2C3C.B
6 j 27.6
1P« ?H
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5I.47.0
5113.1
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17 >00
q-toco
sow
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<16
24P.70
11.000
11.QOO
I 2 .2
II .*70
4.«2li
t .925
7 mi J7_
6.2 92
5.VM
5 .0 10
II.5 86
1 4 .i ?t
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14.J5J
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12.000
1/.674
1T.tlt
18 .00 Q-
256
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3.5<
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74.00 0-4000
15<6
111
3.52
0.00
1 -1 75
6.000
-------
CHOflEN CAMPBELL
CA1I "tiJiC#?
my i
21
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Pit GALLON ui rulL Ifi-E PI HOS1 WINICIt h I ICMI nt
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M »« -~U. i.
•
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A VG G V W
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25.00
0-60011
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26 .00
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2i1 .23
16.089
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CMPEN C AHPBELL
B»lt UZiCt?
piit
73'
HUHUIH 01 1RU(K&, AWlkAbl AkNUAL MLEi.AKfi A V l»Atl MllFS
Ptli 6»tLOh b< IUH 11P| Hi (RUSS KfHKll .f Utt| r»
^UDll 11*8 - - U . i •
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«ue evu
SUHblB 0 1
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0-6000
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2 0 li
15 4
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ANNUAL
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2;17.4
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-------
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PIS GALLON HI IUIL I1t-|
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10.106
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7.973
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44
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C«*REN CAMPBELL
BAIE C3iOt7
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a
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1 I AR
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2 tO01 -3 3 OuO
dbf HliNU'L KiK S,MB «»(B*Cf Hllii
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4.0 00
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976.76
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7*7.55
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11.047
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0-600 0
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13.731
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14
1131.6
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6.306
-------
CAIHEN CAPPGELL
¦All 0?i0t7
Plfcf
NUNBEU or iSlltKS. AVCUAfaE AkNUAL MILIi,**! »Vl«AfcE Mlfi
MA8 --U.i.
NENGMP NO DEL
tua
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fcUAOlK 0»
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ANNUAL
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1JOUl-1 4000
1493
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10.216
1 40U1-1 6 OlID
<»3 6
1702.9
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1£001-19 5UO
£13.94
7.913
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12.313
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0 -600L
25
-------
CJIMEN CMIPBELL
" 13JCE7
FJfcl
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PtH 6»H.0» HI run 111-^ E^I fiSOSi VIHIClt
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CMREN CARP BELL
• Alt CI AOS 7
21
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Pi B 1 LOW bl IQti H»E Bl fcPOiS ^ FHI Ifcul t! 1
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166 7.9
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" CACNEN CAHPBEIL - - - "tilt Oliver " Flfcf " FP~
numb Cm or tr uik i« AwtaAwt
H£B 6«IL0U b* |UIL l«fi
ANNUAL H1LES.ANI AHtACI HUES
Bt 6»0SS VEHICLE bl IfaHl HI
MOBIL
UAR --U.S.
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i f a#
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MILES
5 J001 ANt OV
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-------
CAGNEN CAMPBELL
DATE 034067
PAbi
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NUhUIM or IRul'S. AwEMAGE ANNUAL H1LC..ANI AHIAA6E MILES
PEH 6ALL0H tUfL I »| P 1 G« US S WE H I (L E » E ItHI H
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-------
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-------
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CABMEN CAMPBELL
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-------
(MrnEH CARPPELL
Bail LUOt?
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6.951
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3 6 71 i
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ANNUAL HlLEb.ANIi A v t ^ A Gt MLIS
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-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS
50,000+ LBS GVH
AGE
FUEL
_FREQ_
STOCK
SIGSTOCK
AVEVHT
SIGVHT
AVEWPG
SIGMPG
1
GASOLINE
2
132
0
13412
0
3.81
1 .97
2
GASOLINE
2
170
0
45631
0
5.00
2 .92
3
GASOLINE
4
236
25
21012
7 555
4.77
2.42
4
GA50LI ME
6
324
67
48828
22320
4.86
3.18
5
CJV',01 1 ME
4
189
45
19768
7314
3.83
2.16
t
L.ASOI HIE
3
144
60
25630
14011
4. 16
1 .97
/
me
4
290
36
68399
3554?
2. 35
2.12
a
r.ASOl I N C
17
889
118
27345
9725
4 66
2.54
9
GAS 01 1UE
17
864
65
12628
3440
3 42
1 .54
10
GASULINE
15
866
61
15620
3633
3.23
1.44
10 +
GASOLINE
91
4689
275
15098
3092
4.21
1.21
1
DIESEL
654
31889
640
93826
3563
5.37
0.28
>
2
DIESEL
1181
53332
866
82742
2316
5.21
0.19
NJ
3
DIESEL
1568
748^2
1065
77789
2045
5.07
0 .\&
CO
4
DIESEL
2207
104798
1289
70163
1536
4.98
0.15
5
DIESEL
1642
81412
1146
64568
1686
4 .95
0.18
6
DIESEL
147 3
75963
1206
61417
1759
4 .85
0 19
7
DIESEL
677
32712
711
55049
2390
4.87
0.28
8
DIESEL
847
41930
808
45965
1680
4.77
0.24
9
DIESEL
1121
57421
942
44123
1497
4.74
0.22
10
DIESEL
1008
49604
855
40995
1560
4.68
0.25
10 +
DIESEL
2687
128853
1451
32489
845
4.80
0 .17
-------
1982 TRUCK INVENTORY AND USE SURVEY
STOCK, VMT, AND MPG ANALYSIS FOR ALL HEAVY DUTY GASOLINE TRUCKS
(OVER 10,000 LBS GUM)
AGE
_FREQ_
STOCK
SIGSTOCK
AVEVMT
SIGVNT
AVEMPG
SIGMPG
1
147
12833
535
19487
1875
5.86
0 .84
2
327
2S565
833
15343
1014
5.76
0.53
3
550
42771
925
14827
701
5.74
0.40
4
1078
90725
1438
14716
571
5.62
0 . 32
5
812
7 7873
1308
14238
639
5.78
0 . 36
6
877
88144
3929
1 3348
876
5.70
0 . 39
7
849
80 1 9 1
] 378
11333
482
5.45
0. 39
6
1242
1 10 b 1 2
1537
10120
365
5.50
0 . 29
9
1110
1 1 ? 1 'j <.
1513
9675
356
5.52
0 31
10
) i4 1
119004
lfefeO
9314
35f>
5 T7
0 31
1 0 ~
8 925
7 96812
66 \c
5913
126
6.21
0 19
>
t-o
vo
-------
AGE
1
2
3
4
5
6
7
8
9
10
10+
1
2
3
4
5
6
7
S
9
10
10 +
1982 TRUCK INVENTORY
AND USE
SURVEY
STOCK. VMT,
AND (IPG
ANALYSIS FOR
10,001 -
19,500 LBS
GVH
FUEL
FREQ
STOCK
SIGSTOCK
AVEVMT
SIGVMT
AVEMPG
SIGMPG
GASOLINE
25~
2660
300
21023
4708
6.39
2.15
GASOLINE
<~9
5842
36 2
15928
2382
6. 9Z-
1 . 36
GASOLINE
76
7768
368
14519
1480
6 .51
0.99
GASOLINE
153
13552
587
14531
1578
6 .64
0.94
GASOLINE
133
15460
552
14718
1263
6 .59
0.87
GASOLINE
157
15930
660
14926
1526
6 .20
0.84
GASOLINE
165
17081
651
10911
922
6 .46
0.76
GASOLINE
221
21651
698
10655
851
6 .44
0 73
GASOLINE
257
25257
788
10588
950
6 27
0 . 90
GASOLINE
287
29032
853
9789
728
6 72
0.67
GASOLINE
36 59
365289
4057
5373
177
7 .07
0. 33
DIESEL
4
268
66
52113
21011
11 58
6 78
DIESEL
19
2089
162
32539
6126
9 75
2. 39
DIESEL
26
2129
207
22911
3854
9.66
2. 35
DIESEL
24
5075
208
23161
3417
7.48
3.47
DIESEL
11
1412
72
22888
3423
9.56
2. 59
DIESEL
3
167
35
5942
3207
10.07
8.02
DIESEL
14
1343
198
23421
5647
9.53
2.71
DIESEL
12
1999
130
16744
236 4
5.51
2.90
DIESEL
2
205
0
13377
0
6 .23
3.28
DIESEL
6
604
52
1353B
3279
6 .99
3.13
DIESEL
49
3937
328
10099
1780
7 .47
1 .99
-------
APPENDIX B
U.S. BUREAU OF CENSUS ANALYSIS OF OLDER VEHICLES
IN THE 1982 TIUS
B-l
-------
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