An official website of the United States government.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Regulations for Emissions from Vehicles and Engines

The Safer and Affordable Fuel Efficient Vehicles Proposed Rule for Model Years 2021-2026

Rule Summary

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.

The National Highway Traffic Safety Administration (NHTSA) and the Environmental Protection Agency (EPA) propose to amend certain existing Corporate Average Fuel Economy (CAFE) and greenhouse gas emissions standards for passenger cars and light trucks and establish new standards, covering model years 2021 through 2026.

Public Comments: Please submit comments at to Docket EPA-HQ-OAR-2018-0283. Information on additional methods for submitting formal comments is available at

Public Hearings: NHTSA and EPA will jointly hold three public hearings on this proposal in Washington, D.C.; in the Detroit, MI area; and in the Los Angeles, CA area. The agencies will announce the dates and locations of the hearings in a supplemental Federal Register notice.

Additional Resources

Regulations for Emissions from Vehicles and Engines Home