Data / Federal rules / 2026-12981
Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles
The National Highway Traffic Safety Administration published this proposed rule in the Federal Register on June 26, 2026. Comments closed on July 27, 2026.
SpecStream is the live web data engine for teams and agents. It reads every rule and proposed rule in the Federal Register each morning, and this page is that reading. Name your industry once and new rules, comment deadlines and effective dates arrive in your sheet, CRM, Slack or agent as they are published.
What the agency says
NHTSA is 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 proposed modifications would clarify definitions, telltale requirements, performance requirements, and test procedures in the standard and remove sections that are no longer relevant. The stopping distance performance requirements, which address the primary safety purpose of the standard, would still apply to all subject vehicles. This rulemaking would remove unnecessary regulatory burdens and costs without detriment to vehicle safety.
Key facts
- Document number
- 2026-12981
- Type
- Proposed rule
- Action
- Notice of proposed rulemaking
- Agency
- Transportation Department; National Highway Traffic Safety Administration
- Published
- June 26, 2026
- Comments due
- July 27, 2026
- Dates
- Comments should be submitted no later than July 27, 2026.
- Docket
- Docket No. NHTSA-2026-0728
- Regulation ID (RIN)
- 2127-AN00
- Code of Federal Regulations
- 49 CFR 571
- Topics
- Motor vehicle safety; Motor vehicles
- Pages
- 20
Other documents from the National Highway Traffic Safety Administration
Everything from the National Highway Traffic Safety Administration · Rules on motor vehicle safety · Rules on motor vehicles · Published in June 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.