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DOT/NHTSA RIN: 2127-AM36 Publication ID: Spring 2025 
Title: Heavy Vehicle Automatic Emergency Braking 
Abstract:

Pursuant to a statutory mandate in the Infrastructure Investment and Jobs Act, this notice would seek comments on a revised proposal to require and/or standardize equipment performance for automatic emergency braking on heavy trucks and motor carrier maintenance requirements for vehicles equipped with such technology. For several years, NHTSA has researched forward collision avoidance and mitigation technology on heavy vehicles, including forward collision warning and automatic emergency braking systems. This rulemaking proposes test procedures for measuring performance of these systems. This is a joint rulemaking of the National Highway Traffic Safety Administration (NHTSA) (RIN 2127-AM36) and Federal Motor Carrier Safety Administration (FMCSA) (RIN 2126-AC49).

 
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: No 
EO 14192 Designation: Regulatory 
CFR Citation: 49 CFR 571   
Legal Authority: 49 U.S.C. 30111    49 U.S.C. 30115    49 U.S.C. 30117    49 U.S.C. 30166    49 U.S.C. 322    delegation of authority at 49 CFR 1.95   
Legal Deadline:
Action Source Description Date
Final  Statutory  Complete rulemaking  11/15/2023 
Timetable:
Action Date FR Cite
NPRM  07/06/2023  88 FR 43174   
NPRM Comment Period End  09/05/2023 
Supplemental NPRM  12/00/2025 
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 
Related RINs: Related to 2126-AC49 
Agency Contact:
Hisham Mohamed
General Engineer
Department of Transportation
National Highway Traffic Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-0307
Email: hisham.mohamed@dot.gov