Official Release of the MOVES6 Motor Vehicle Emissions Model for SIPs and Transportation Conformity

Document Headings Document headings vary by document type but may contain the following: the agency or agencies that issued and signed a document the number of the CFR title and the number of each part the document amends, proposes to amend, or is directly related to the agency docket number / agency internal file number the RIN which identifies each regulatory action listed in the Unified Agenda of Federal Regulatory and Deregulatory Actions See the Document Drafting Handbook for more details. Environmental Protection Agency [FRL-13436-01-OAR] AGENCY: Environmental Protection Agency (EPA). ACTION: Notice of availability. SUMMARY: The U.S. Environmental Protection Agency (EPA) is announcing ( printed page 67566) the availability of the latest major release of the MOtor Vehicle Emission Simulator (MOVES) model, MOVES6. MOVES6 is the latest version of the EPA's state-of-the-science modeling tool for estimating emissions from cars, trucks, buses, and motorcycles based on the latest data and regulations. MOVES6 is available for use in State Implementation Plans (SIPs) and transportation conformity analyses. This notice starts a two-year grace period before MOVES6 will be required for use in transportation conformity determinations, both in new regional emissions analyses and in new hot-spot analyses. DATES: The EPA's announcement of the MOVES6 emissions model for SIPs and transportation conformity determinations in States other than California is effective October 27, 2026. This announcement starts a two-year transportation conformity grace period that ends on October 27, 2028. After this date, MOVES6 will be required for use as the latest EPA emissions model for new transportation conformity analyses other than California in both regional emissions analyses and in hot-spot analyses. FOR FURTHER INFORMATION CONTACT: For technical model questions regarding the use of MOVES6, please email moves@epa.gov . For questions about SIPs, contact Kaitlyn Leffert at leffert.kaitlyn…