MOVES2014b Release

EPA has released MOVES2014b to improve estimates of emissions from nonroad mobile sources. MOVES2014b does not significantly change the on-road criteria pollutant emissions results of MOVES2014 and is not considered a new model for State Implementation Plan (SIP) and transportation conformity purposes. 

The MOVES web page, , has been updated with a detailed “Question and Answer” document, updated technical guidance, installation instructions, and an update to the MOVES2014 User Interface Reference Manual.  These materials are designed to answer user questions about the changes in nonroad emission estimates, and when and how to use the updated model.  EPA plans to announce a public webinar about MOVES2014b soon.  Individual user questions should be addressed to [email protected]

Two Air Quality Webinars: An Introduction to Transportation Conformity; and An Introduction to MOVES

The purpose of this is to announce and provide registration information on two upcoming air quality webinars.  Considering recent technical assistance requests from State DOTs and MPOs, the FHWA Office of Natural Environment and the FHWA Resource Center will be offering basic transportation conformity overview and basic MOVES emissions model training in the form of two live webinars which will be recorded.  The target audience for these webinars are FHWA staff and State and local transportation partners (MPOs and State DOTs)  who are either new to or would like a refresher training on the conformity process.

These webinars are open to the public.  We ask that Division staff please share the webinar information with State and MPO staff and encourage them to participate.  Details for these webinars are shown below:

Name of Event: AQ Technical Assistance 1 of 2 – Introduction to Transportation Conformity
Date: Tuesday, June 12, 2018
Time: 1:00PM – 2:30PM ET
Event Description: This webinar will provide an overview of the transportation conformity requirements.  The accompanying webinar (part 2 of 2) will introduce the MOVES model.

Registration Link:

Registration Deadline: Thursday, June 7, 2018

Name of Event: AQ Technical Assistance 2 of 2 – Introduction to MOVES
Date: Monday, June 18, 2018
Time: 1:00PM – 2:30PM ET
Event Description: This webinar will provide an introduction of MOVES emissions model basics. The accompanying webinar (part 1 of 2) will provide an overview of the transportation conformity requirements.
Registration Link:
Registration Deadline: Wednesday, June 13, 2018.


FHWA has moved to a new webinar registration system.  In the new system, EXTERNAL users (those without a USDOT email address) will have to request an account before they can register. Step-by step instructions on how to request an account can be found here:

The account issuance takes approximately one business day.  Once you receive your account information, you can access the site by clicking on the registration link and logging in. Please contact [email protected] if you need technical support with registering.

For questions related to the webinars, please contact:
David Kall,  Office of Natural Environment
Phone: 202-366-6276.
Email: [email protected]

Please also note that additional transportation conformity training is available on-demand from FHWA’s website (   See under “Web-based Training.”

EPA Plans Minor Update to MOVES

EPA is planning a minor update to MOVES2014.  We are targeting release for summer 2018.

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. As compared to the current MOVES2014a, MOVES2014b will be a “minor” update to MOVES that will not change onroad emission inventories for criteria pollutants (e.g., this minor update will not affect transportation conformity analyses). However, it will improve emission estimates for nonroad mobile sources, which may be used in developing state implementation plans (SIPs).

In particular, the update will improve nonroad engine population growth rates, nonroad Tier 4 emission rates, and sulfur levels of nonroad diesel fuels.   A draft technical report that describes much of this work are currently available on EPA’s Science Inventory web site:

EPA is now testing and quantifying the net impacts of the changes compared to MOVES2014a.  We will share that information as part of the MOVES2014b release.

Separate from MOVES2014b, we continue to work on the next “major” update to MOVES, including changes to onroad emissions & activity.  Timing is still being determined, but that release will be in 2019 at earliest.

EPA releases final version of the MOVES greenhouse gas guidance

EPA has released the final version of the MOVES greenhouse gas guidance and it can be found on EPA's web page at the following address:  This final version replaces the public draft version that was found on that same page.  

This technical guidance explains how to use the MOVES model to estimate greenhouse gas emissions from on-road vehicles to create state or local inventories, or to estimate total energy consumption from the on-road sector.  

This final version is updated with the features in MOVES2010b, released April of this year, as well as other minor changes.  The direct link to this document is