Data / Federal rules / 2026-15231

Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles; Extension of Comment Period

The National Highway Traffic Safety Administration published this proposed rule in the Federal Register on July 28, 2026. It took effect on June 26, 2026. Comments closed on August 26, 2026.

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What the agency says

In response to a request from Varnum LLP (Varnum), NHTSA is announcing a 30-day extension of the public comment period for the notice of proposed rulemaking (NPRM) published on June 26, 2026 proposing to amend Federal Motor Vehicle Safety Standard (FMVSS) No. 135, "Light vehicle brake systems." The proposed modifications would distinguish how regulations apply to vehicles with and without manually operated driving controls. The comment period for the NPRM was originally scheduled to end on July 27, 2026. It will now end on August 26, 2026.

Key facts

Document number: 2026-15231
Type: Proposed rule
Action: Extension of comment period
Agency: Transportation Department; National Highway Traffic Safety Administration
Published: July 28, 2026
Takes effect: June 26, 2026
Comments due: August 26, 2026
Dates: The comment period for the NPRM published at 91 FR 38593 on June 26, 2026, is extended to August 26, 2026.
Docket: Docket No. NHTSA-2026-0728
Regulation ID (RIN): 2127-AN00
Code of Federal Regulations: 49 CFR 571
Pages: 1

The document on federalregister.gov PDF

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Everything from the National Highway Traffic Safety Administration · Published in July 2026

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.