Corporate Average Fuel Economy
NHTSA's Corporate Average Fuel Economy (CAFE) standards regulate how far our vehicles must travel on a gallon of fuel. NHTSA sets CAFE standards for passenger cars and for light trucks (collectively, light-duty vehicles), and separately sets fuel consumption standards for medium- and heavy-duty trucks and engines. NHTSA also regulates the fuel-economy window stickers on new vehicles. This site contains information about many aspects of these programs, and we encourage you to check back as new information is posted.
Mar. 31, 2020: NHTSA and EPA finalize CAFE and carbon dioxide emissions standards for model years 2021-2026
The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule, issued today by NHTSA and EPA, sets tough but feasible fuel economy and carbon dioxide standards that increase 1.5% in stringency each year from model years 2021 through 2026. These standards apply to both passenger cars and light trucks, and will continue our nation’s progress toward energy independence and carbon dioxide reduction, while recognizing the realities of the marketplace and consumers’ interest in buying vehicles that meet all of their diverse needs.
Sept. 19, 2019: NHTSA and EPA establish One National Program for fuel economy regulation
"The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule Part One: One National Program" announced EPA's decision to withdraw California's waiver of preemption under Section 209 of the Clean Air Act, and finalized NHTSA's regulatory text relating to preemption under 49 U.S.C. 32919.
Light-Duty Vehicles
Standards
Passenger car standards: 49 CFR Part 531
Minimum domestic passenger car standards: 49 CFR 531.5(d)
Light truck standards: 49 CFR Part 533
Documents Associated with Earlier Rulemakings
- 2016 Draft Technical Assessment Report and associated mid-term evaluation documents
- MYs 2017 and beyond rulemaking
- MYs 2012-2016 rulemaking
- MY 2011 and earlier
CAFE Compliance and Effects Modeling System
Compliance and Enforcement
CAFE self-service reporting data portal
NHTSA’s Public Information Center allows researchers, analysts, media, general public, etc.) to easily access dynamic data about manufacturer compliance with the light-duty CAFE program through the CAFE PIC self-service reporting portal. The PIC provides timely, reliable fuel economy data, which can be viewed in report and/or graph format. The data can be easily sorted and filtered based on specific areas of interest to produce custom reports, which can also be downloaded as excel or pdf files.
Rulemaking on civil penalty rate
July 12, 2019: NHTSA final rule retains the $5.50 penalty rate applicable to automobile manufacturers that fail to meet CAFE standards.
Heavy-Duty Vehicles
Phase 2
The compliance dates for NHTSA’s fuel efficiency regulations, to the extent they apply to truck trailers, are currently stayed, pursuant to an order of the United States Court of Appeals for the District of Columbia Circuit issued on September 29, 2020 in case No. 16-1430.
Final Rule for Phase 2 fuel efficiency and GHG emissions standards for medium- & heavy-duty vehicles, MY2018-2027
- Final Rule
- Final Regulatory Impact Analysis
- Final Environmental Impact Statement
- Environmental Impact Statement Summary
- Environmental Impact Statement Appendices
- Response to Comments
- Compliance and Effects Modeling System
Documents relating to the Phase 2 proposal for medium- & heavy-duty vehicles, MY 2018-2027
- Trailer Fact Sheet
- Notice of Proposed Rulemaking
- Draft Regulatory Impact Analysis
- CAFE Model for HD Pickups and Vans
- Research supporting Phase 2 proposal
- Submit comments to docket NHTSA-2014-0132
Phase 1
Phase 1 of Fuel Efficiency and GHG Emission Program for Medium- and Heavy-Duty Trucks, MYs 2014-2018
Technical Amendments
- Partial Withdrawal of Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments
- Heavy-Duty Engine and Vehicle, and Nonroad Technical Amendments
Final Rule
NEPA Process
- Final Environmental Impact Statement
- Draft Environmental Impact Statement
Notice of Proposed Rulemaking
- Correction Notice for Notice of Proposed Rulemaking
- Notice of Proposed Rulemaking
- Draft Regulatory Impact Analysis
- NHTSA Study: Factors and Considerations for Establishing a Fuel Efficiency Regulatory Improvement Program for Commercial Medium- and Heavy-Duty Vehicles
- Notice of Public Hearings for Proposal
- Letters from medium- & heavy-duty vehicle stakeholders
- NAS Study: Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles
Fuel Economy and Environment Label
NHTSA and the Environmental Protection Agency (EPA) issued a joint final rule establishing new requirements for a fuel economy and environment label that will be posted on the window sticker of all new automobiles sold in the U.S.