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DOT/NHTSA RIN: 2127-AL76 Publication ID: Fall 2018 
Title: The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule for Model Years 2021--2026 Passenger Cars and Light Trucks 

The Department of Transportation’s National Highway Traffic Safety Administration (NHTSA) and the U.S. Environmental Protection Agency (EPA) proposed a rule to adjust the corporate average fuel economy (CAFE) and greenhouse gas (GHG) emissions standards for model years (MYs) 2021 through 2026 light-duty vehicles. EPA established national GHG emissions standards under the Clean Air Act that extend through 2025, and NHTSA established augural CAFE standards for MY 2022-2025 vehicles under the Energy Policy and Conservation Act, as amended by the Energy Independence and Security Act (EISA). This joint rulemaking proposes adjustments to those standards, following conclusion of the Mid-Term Evaluation (MTE) process and EPA’s Final Determination that it is appropriate to adjust the MY 2022-2025 GHG emission standards.


Agency: Department of Transportation(DOT)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: Undetermined 
EO 13771 Designation: Deregulatory 
CFR Citation: 49 CFR 531    49 CFR 533   
Legal Authority: 49 U.S.C. 32902    delegation of authority at 49 CFR 1.95   
Legal Deadline:
Action Source Description Date
Final  Statutory  Publish Final Rule  04/01/2020 

Statement of Need:

Setting Corporate Average Fuel Economy standards for passenger cars, light trucks and medium-duty passenger vehicles will reduce fuel consumption, and will thereby improve U.S. energy independence and energy security, which has been a national objective since the first oil price shocks in the 1970s. Transportation accounts for about 70 percent of U.S. petroleum consumption, and light-duty vehicles account for about 60 percent of oil use in the U.S. transportation sector.

Summary of the Legal Basis:

This rulemaking responds to requirements of the Energy Independence and Security Act of 2007 (EISA), title 1, subtitle A, section 102, as it amends 49 U.S.C. section 32902, which was signed into law December 19, 2007. The statute requires that corporate average fuel economy standards be prescribed separately for passenger automobiles and non-passenger automobiles. For model years 2021 to 2030, the average fuel economy required to be attained by each fleet of passenger and non-passenger automobiles shall be the maximum feasible for each model year. The law requires the standards be set at least 18 months prior to the start of the model year.


See the accompanying Regulatory Impact Analysis for the discussion of alternatives.

Anticipated Costs and Benefits:

See the accompanying Regulatory Impact Analysis for the discussion of estimated costs and benefits.


The agency believes there are no substantial risks to this rulemaking.

Action Date FR Cite
NPRM  08/24/2018  83 FR 42986   
NPRM Comment Period Extended  09/26/2018  83 FR 48578   
NPRM Comment Period End  10/23/2018 
NPRM Comment Period Extended End  10/26/2018 
Analyzing Comments  11/00/2018 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: Undetermined 
Included in the Regulatory Plan: Yes 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Related Agencies: Joint: EPA; 
Agency Contact:
James Tamm
Fuel Economy Division Chief
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 493-0515