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DOT/NHTSA RIN: 2127-AM25 Publication ID: Fall 2020 
Title: +Medium and Heavy-Duty Fuel Efficiency Standards 
Abstract: This rulemaking would request comment on whether NHTSA and EPA should reconsider certain aspects of the fuel efficiency and greenhouse gas (GHG) standards for medium- and heavy-duty on-highway vehicles and work trucks for model years beyond 2018 that were established in the agencies' October 25, 2016 final rule. In particular, the agencies are considering whether to continue the engine standards and advanced technology incentives included in the 2016 rule, and expect to request comment on the effects of these aspects of the program and the best ways to model these effects, which were not modeled in the 2016 rule. The agencies are further considering whether the stringency of standards in later model years covered in that rulemaking as they apply to covered vehicles remain appropriate. This action would complement the separate rulemaking reevaluating the standards for trailers that the agencies are pursuing under RINs 2127-AM17 and 2060-AU50. 
Agency: Department of Transportation(DOT)  Priority: Economically Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Prerule Stage 
Major: Yes  Unfunded Mandates: Undetermined 
EO 13771 Designation: Deregulatory 
CFR Citation: 49 CFR 523    49 CFR 534    49 CFR 535   
Legal Authority: 49 U.S.C. 32902(k)(2)    delegation of authority at 49 CFR 1.95   
Legal Deadline:  None
Action Date FR Cite
ANPRM  06/00/2021 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: Undetermined 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Related RINs: Related to 2060-AU50, Related to 2127-AM17  Related Agencies: Joint: EPA/OAR; 
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