SmartWay*
        MENTAL PROTECTION AGENCY »
 U.S. ENVIRONMENTAL PROTECTION AGENCY
SmartWay-verif led  Aerodynamic  Technologies
  EPA's SmartWay Transport
  Program is a market-driven
  partnership to help busi-
  nesses move goods in the
  cleanest, most efficient
  way possible. By providing a
  consistent set of tools and
  information  needed to make
  informed transportation
  choices, SmartWay enables
  companies across the country
  to benchmark performance
  data in ways that protect our
  environment,encourage eco-
  nomic vitality, and enhance
  our nation's energy security.
  EPA's SmartWay Technology
  program helps carrier fleets
  make informed business
  decisions to  save fuel and
  improve their supply chain
  efficiency.
  This new program element
  is part of the 2OI5  SmartWay
  trailer program updates that
  include adding large refrig-
  eration trailers and incorpo-
  rating multiple aerodynamic
  performance evaluation tools.
EPA's SmartWay Technology Program has expanded to allow trailer aerodynamic
verification through multiple testing pathu/ays.


EPA's SmartWay Technology Program verifies fuel savings from aerodynamic devices and low-
rolling resistance tires that can be used on 53-foot box dry van and refrigerated in long-haul
operations.
EPA verifies individual devices or combinations of devices tested using SmartWay's robust
protocols; these devices are known as "SmartWay-verified" devices. SmartWay aerodynamics-
test protocols create consistent, comparable fuel-savings estimates under high-speed cruise
conditions for long-haul tractor-trailers.
In 2015, EPA finalized the use of expanded testing-verification pathways to include an enhanced
track test, wind tunnel testing, coastdown testing, and computational fluid dynamics (CFD). If
trailer aerodynamic devices demonstrate fuel savings in SmartWay testing, they are identified as
SmartWay-verified and are listed, along with SmartWay-verified low-rolling resistance tires, on the
SmartWay website's technology verification page (www.epa.gov/smartway/forpartners/technology.htm).


Trailer aerodynamic devices can be verified with any of these methods. Previously, SmartWay -
verified devices were tested using one method. Manufacturers may now choose  from three (3)
SmartWay protocols to determine fuel savings for verification.  Manufacturers have the option of
testing their device using additional SmartWay protocols to receive additional  recognition within
the online verified device table. For example, a manufacturer could initially test and verify a
device using a wind tunnel test. If the manufacturer also conducts coastdown testing on the same
device, the SmartWay technology webpage will indicate that the device has demonstrated fuel
savings with  both wind tunnel and coastdown testing.  This provides fleet managers with added
confidence that the device has demonstrated fuel savings.


EPA also replaced device-based verification categories with performance-based  categories for all
aerodynamic device testing. Aerodynamic devices that fall into these new performance thresholds
are demonstrated to achieve fuel savings of 1%, 4%, 5% and  9% or more.
Fleet managers can select individually-verified aerodynamic devices from any of the performance
thresholds and combine them to meet to the total fuel savings threshold required to qualify as
EPA—designated SmartWay or SmartWay Elite trailer. For example, the SmartWay trailer threshold
of at least 5% fuel savings could be achieved by using a 5% device or combining a 1% and  a
4% device. A SmartWay Elite trailer designation could be earned using a 9% package or pairing
individual 4% and 5% components.
     A listing of SmartWay-verified devices can  be found  on www.epa.gov/smartway/forpartners/
      technology.htm
        The table on the  following page shows the difference between SmartWay-verified
           technologies, combinations of these technologies, and EPA-designated SmartWay
             and SmartWay Elite trailers.
                                                                                                     Continued
                                                 U.S. EPA SmartWay |  EPA-420-F-I5-006 |  www.epa.gov/smartway

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U.S. ENVIRONMENTAL PROTECTION AGENCY"
        SmartWay
        MENTAL PROTECTION AGENCY »
SmartWay-verified Aerodynamic Technologies
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           Terminology
    SmartWay-verified low-rolling
    resistance tires
    SmartWay-verified aerodynamic
    device
    SmartWay-verified Elite aerody-
    namic technology combinations
    SmartWay Trailer
    SmartWay Elite Trailer
                                           Definition
                                  Low-rolling resistance tires that
                                  have been verified to achieve 1%
                                  fuel savings for trailers
                                  A trailer fairing (front, side, rear,
                                  or under-trailer) that have been
                                  SmartWay-verified to produce
                                  1 %, 4%, or 5% fuel savings
                                  for trailers
                                  A combination of multiple trailer
                                  fairings (front, side, rear, and/
                                  or under-trailer) that have been
                                  SmartWay-verified to produce 9%
                                  fuel savings for trailers
                                  A 53-foot box dry van or refriger-
                                  ated trailer that uses SmartWay-
                                  verified low-rolling resistance tires
                                  and aerodynamic technology(s) to
                                  achieve a total of 6% fuel savings
                                  (1% from trailer tires; 5%
                                  from aerodynamic
                                  technologies)
                                  A 53-foot box dry van or refriger-
                                  ated trailer that uses SmartWay-
                                  verified low-rolling resistance
                                  tires and SmartWay-verified Elite
                                  Aerodynamic Technology Combi-
                                  nations to achieve a total of 1 0%
                                  fuel savings (1% from trailer
                                  tires; 9% from aerodynamic
                                  technologies)
 Fuel Savings At a Glance
1% or greater
1 %, 4% or 5% or greater
9% or greater
6% or greater
10% or greater
   Aerodynamics on trucks will perform differently depending upon driving speeds, tractor and trailer set-up,
   and the weather. The SmartWay verification program guides fleets to devices with demonstrated performance
   using controlled verification testing at high-speed cruise conditions (for consistent comparison). Even though
   some fleets may see fuel savings higher than the EPA verified levels, many fleets may operate at lower speeds.
                                     While SmartWay test methods establish uniform measurement
                                     conditions, EPA is also conducting research to provide fleets with
                                     information on  how they might adjust fuel savings estimates based
                                       on their unique operating conditions. These fuel savings are still
                                          significant and smart business.
                                            For more information: www.epa.gov/smartway/forpartners/
                                             technology.htm or Tech_Center@epa.gov
                                                U.S. EPA SmartWay |  EPA-420-F-15-006 | www.epa.gov/smartway

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