EPA Requests Comments  on
"Demonstration Version" of  MOVES
Highway Vehicle  Emissions Model
    The U.S. Environmental Protection Agency is requesting comments on a new
    demonstration version of the MOVES model for highway vehicles. We are
currently developing MOVES as an eventual replacement to the MOBILE6.2
model of highway vehicle emissions and the NONROAD model of emissions from
non-road mobile sources. The new "MOVES Demo" includes the major software
features planned for the future MOVES model and provides an excellent oppor-
tunity for modelers to start learning to use the advanced features of the MOVES
model and to provide feedback to us as we continue our work on the MOVES
model.

Please note that all of the criteria pollutant emission rates in MOVES Demo are
placeholder values and do not represent actual emission rates. Users may not use
MOVES for any submissions for State Implementation Plans (SIPs) or conformity
determinations until EPA approves an "official" version of MOVES.

We are distributing MOVES Demo now because user comments will help us make
the final model more user-friendly. In particular, we hope MOVES Demo will be
useful to those trying to develop tools to integrate MOVES with transportation and
air quality models. In addition, EPA will use MOVES Demo in preliminary training
courses such as the training EPA is offering at the International Emission Inventory
Conference in North Carolina in May 2007.

MOVES Demo replaces MOVES2004 and expands upon MOVES2004 software.
It adds more pollutants, evaporative emissions, a trip processor to compute vehicle
start and soak times, a post-processor to produce summary output, a pre-processor for
inspection and maintenance (IM) inputs, and optional output in grams/mile,  among
other features.

Instructions for downloading MOVES Demo are available on the Web at www.epa,
gov/otaq/ngm.htm. A preliminary draft user guide also is available. Draft guidance on
MOVES inputs is not yet available, but, please note,  we anticipate that the national
default fleet and activity data in MOVES will have limited applicability for SIPs
United States
Environmental Protection
Agency
                                  Office of Transportation and Air Quality
                                                    EPA420-F-07-044
                                                          May 2007

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and conformity determinations. When a final version of MOVES is available, we will require
SIP and conformity modelers to replace the national default data with local data, replacing the
"national" domain with one or more "local" domains.

MOVES Demo will be followed by a comprehensive draft version of MOVES for highway
vehicles that will include draft emission rates that are EPA's best estimates of actual emissions.
We plan to schedule an additional significant comment period on this draft model to assure that
all stakeholders have adequate time to review the comprehensive draft model. The date of the
draft model release will depend on EPA progress resolving emission rate technical issues, but is
estimated to be in the fall of 2008.

After we complete stakeholder review of MOVES Demo and the future comprehensive draft
MOVES for highway vehicles, we plan to release an official version of MOVES, approved for use
estimating highway vehicle emissions in SIPs and conformity determinations. The timing for
the official MOVES version will depend on the comments received on MOVES Demo and the
future draft MOVES, but is most likely to be in the fall of 2009.

If you have questions or comments about the MOVES Demo or the MOVES project in general,
please contact the MOVES team by e-mail at mobile@epa.gov.
EPA Requests Comments on MOVES Demo

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