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DOT/FMCSA RIN: 2126-AC49 Publication ID: Spring 2023 
Title: Automatic Emergency Braking Systems 
Abstract: This joint rulemaking of the National Highway Traffic Safety Administration (NHTSA) and Federal Motor Carrier administration (FMCSA) will be seeking comments on a proposal to require and/or standardize equipment performance for automatic emergency braking (AEB) systems on heavy trucks (2127-AM36). The rulemaking is expected to propose performance standards and motor carrier maintenance requirements for AEB systems on heavy trucks and accompanying test procedures for measuring the performance of the AEB systems in NHTSA compliance testing. 
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 
CFR Citation: Not Yet Determined     (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: Not Yet Determined   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  06/00/2023 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: Undetermined 
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 2127-AM36 
Agency Contact:
Luke Loy
Office of Bus and Truck Standards and Operations
Department of Transportation
Federal Motor Carrier Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-0676
Fax:202 366-8842
Email: luke.loy@dot.gov