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DOT/FMCSA

RIN: 2126-AC49

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 will 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: Private Sector
EO 14192 Designation: Other
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	07/06/2023	88 FR 43174
NPRM Comment Period End	09/05/2023
Second NPRM	12/00/2025

Regulatory Flexibility Analysis Required: Undetermined	Government Levels Affected: Undetermined
Small Entities Affected: No	Federalism: No
Included in the Regulatory Plan: No
RIN Information URL: www.regulations.gov	Public Comment URL: www.regulations.gov
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 Email: dave.sutula@dot.gov