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DOT/FMCSA RIN: 2126-AC49 Publication ID: Spring 2024 
Title: Heavy Vehicle Automatic Emergency Braking 

This joint rulemaking of the National Highway Traffic Safety Administration (NHTSA) and Federal Motor Carrier administration (FMCSA) will finalize the proposal to require and/or standardize equipment performance for automatic emergency braking (AEB) systems on heavy trucks (2127-AM36). The rulemaking is expected to establish 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. NHTSA and FMCSA engaged in a national outreach, educational, and awareness campaign, and data collection analysis which included the development of training materials for fleets, drivers, and maintenance personnel related to AEB technology and return-on-investment (ROI) guides; educational videos on ADAS braking, steering, warning, and monitoring technologies; a web-based Tech-Celerate Now (TCN) ADAS-specific ROI calculator; and a program website to host the training materials. Planning is underway for the second phase of the TCN program, which includes an expanded national outreach and education campaign, additional research into the barriers to ADAS adoption by motor carriers, and evaluation of the outreach campaign.

Agency: Department of Transportation(DOT)  Priority: Section 3(f)(1) Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: Yes  Unfunded Mandates: Private Sector 
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
Action Date FR Cite
NPRM  07/06/2023  88 FR 43174   
NPRM Comment Period End  09/05/2023 
Final Rule  01/00/2025 
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Related RINs: Related to 2127-AM36 
Agency Contact:
Dave Sutula
Department of Transportation
Federal Motor Carrier Safety Administration
1200 New Jersey Avenue SE,
Washington, DC 20590
Phone:202 366-9209