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DOT/NHTSA RIN: 2127-AM39 Publication ID: Spring 2024 
Title: Fuel Efficiency and Greenhouse Gas Standards for Medium- and Heavy-Duty Engines and Vehicles 
Abstract:

This notice addresses coordination between NHTSA and the Environmental Protection Agency related to fuel efficiency and greenhouse gas standards for medium and heavy-duty engines and vehicles.

 
Agency: Department of Transportation(DOT)  Priority: Section 3(f)(1) Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: Yes  Unfunded Mandates: No 
CFR Citation: 49 CFR 533   
Legal Authority: delegation of authority at 49 CFR 1.95   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  04/00/2025 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL: www.regulations.gov   Public Comment URL: www.regulations.gov  
RIN Data Printed in the FR: No 
Agency Contact:
Joseph Bayer
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-9540
Email: joseph.bayer@dot.gov