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MOVES and Related Models

MOVES2014a: Latest Version of MOtor Vehicle Emission Simulator (MOVES)

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EPA's MOtor Vehicle Emission Simulator (MOVES) is a state-of-the-science emission modeling system that estimates emissions for mobile sources at the national, county, and project level for criteria air pollutants, greenhouse gases, and air toxics.

MOVES2014a is the latest version of MOVES:
  • It incorporates significant improvements in calculating onroad and nonroad equipment emissions.
  • It does not significantly change the criteria pollutant emissions results of MOVES2014, and therefore is not considered a new model for SIP and transportation conformity purposes.
  • MOVES2014a Questions and Answers (PDF)(6 pp, 527 K, EPA-420-F-15-046, November 2015) highlights the differences between MOVES2014a and earlier versions of MOVES, and explains EPA policy on using MOVES2014a in State Implementation Plans and Transportation Conformity Analyses.
On this page:

Downloading MOVES2014a

  • Download the December 2017 Update to MOVES2014a (EXE)(60 MB) : The December 2017 Update to MOVES2014a is the third update to MOVES2014a. The first update, originally released in December 2015, fixed issues with CB05 and CB6 chemical mechanisms. The second update, originally released in November 2016, fixed issues with the MOVES Fuel Wizard and updated emission rates for dioxins and furans. This third update repairs a recently discovered problem with nonroad post-processing scripts.
  • After downloading the setup file, run MOVES2014a-Setup-20171204.exe and follow the on-screen instructions to complete the MOVES2014a installation.
  • This December 2017 Update includes corrections to three nonroad post-processing scripts that can be used to convert nonroad inventory output into emission factors. Previous versions of MOVES included an error in these three scripts. Anyone who wants to use nonroad emission factor scripts to post-process nonroad result should either install the December 2017 version of MOVES2014a above, or download just the scripts and follow the instructions below for manual installation. The three post-processing scripts convert nonroad inventory output into emissions factors. These scripts can be run on both new and existing MOVES-Nonroad output databases, even if the old scripts had previously been run on them. They will delete output from the previous scripts and re-perform the calculations correctly.  These scripts are the only change in the December 2017 update (i.e., there are no changes to the MOVES code or database).
  • The November 2016 update to MOVES2014a (also included in the version linked above) repaired a problem in the Fuel Wizard that, in some cases, resulted in incorrect adjustments to fuel formulations when users changed the ethanol content of the fuel. More information on which fuel scenarios were affected by the error and how the fix impacts a sample county-level emissions inventory are documented in the Fuel Supply Report on the MOVES Technical Reports webpage (https://www.epa.gov/moves/moves-technical-reports). Details on using the Fuel Wizard can be found in the MOVES2014a User Interface Reference Manual (PDF)(59 pp, 605 K, EPA-420-B-16-085, November 2016).

Manual Installation of Nonroad Post-Processing Scripts

  • If you already have the November 2016 update of MOVES2014a installed on your computer, you can manually replace the faulty nonroad post processing scripts using the following steps:
    • Make sure that MOVES is not currently open or running
    • Locate the “database\NonroadPostProcessingScripts” sub-directory of the MOVES installation folder (if the default installation location was used, this will be
    • Download the updated scripts (ZIP)(5 K)  and extract them to the folder located in the previous step. If prompted, you should overwrite the existing files. If the scripts are properly installed, the documentation displayed before the scripts are run will display “NONROAD Post Processing Script (updated 11/17/17)” in the first line.

MOVES2014a User Guide and Manuals

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Using MOVES2014a for SIP and Conformity Purposes (also see MOVES2014a Questions & Answers)

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