WTO notification · TBT
United StatesUpdated: check whether it is now adopted or in force
Official title
Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles
The United States issued an addendum on 29 July 2026 to the earlier TBT notification G/TBT/N/USA/2294. Addenda often report that a measure was adopted, changed, postponed or withdrawn. The measure was first notified on 29 June 2026. The comment period closed on 26 August 2026.
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Light motor vehicle brake systems; Quality; Braking systems; Passenger cars. Caravans and light trailers
The comment period closed on 26 August 2026. You can still raise concerns about the measure with your country's WTO TBT enquiry point, quoting the document symbol G/TBT/N/USA/2294/Add.1; it can take them up with the United States.
Find your country's enquiry point on WTO ePing (opens in a new tab)Latest notice (G/TBT/N/USA/2294/Add.1, 29 July 2026)
Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles
In response to a request from Varnum LLP (Varnum), the National Highway Traffic Safety Administration (NHTSA) is announcing a 30-day extension of the public comment period for the notice of proposed rulemaking (NPRM) published on 26 June 2026 (notified as G/TBT/N/USA/2294) 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 27 July 2026. It will now end on 26 August 2026. The comment period for the NPRM published at 91 FR 38593 on 26 June 2026, is extended to 26 August 2026. 91 Federal Register (FR) 47193, 28 July 2026; Title 49 Code of Federal Regulations (CFR) Part 571: This extension of comment period and the notice of proposed rulemaking notified as G/TBT/N/USA/2294 are identified by Docket Number NHTSA-2026-0728. The Docket Folder is available on Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 26 August 2026. Comments received from WTO Members and their stakeholders will be shared with NHTSA and will also be submitted to the Docket on Regulations.gov if…
Notice of proposed rulemaking - The National Highway Traffic Safety Administration (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.
Every notice about this measure published here, newest first. Each one is the notifying member's own text.
AddendumG/TBT/N/USA/2294/Add.1
Comment deadline: Closed on 26 August 2026
Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles
In response to a request from Varnum LLP (Varnum), the National Highway Traffic Safety Administration (NHTSA) is announcing a 30-day extension of the public comment period for the notice of proposed rulemaking (NPRM) published on 26 June 2026 (notified as G/TBT/N/USA/2294) 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 27 July 2026. It will now end on 26 August 2026. The comment period for the NPRM published at 91 FR 38593 on 26 June 2026, is extended to 26 August 2026. 91 Federal Register (FR) 47193, 28 July 2026; Title 49 Code of Federal Regulations (CFR) Part 571: This extension of comment period and the notice of proposed rulemaking notified as G/TBT/N/USA/2294 are identified by Docket Number NHTSA-2026-0728. The Docket Folder is available on Regulations.gov at and provides access to primary and supporting documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 26 August 2026. Comments received from WTO Members and their stakeholders will be shared with NHTSA and will also be submitted to the Docket on Regulations.gov if…
Regular notificationG/TBT/N/USA/2294
Comment deadline: Closed on 27 July 2026
Federal Motor Vehicle Safety Standards; Modernization of FMVSS No. 135 To Accommodate ADS-Equipped Vehicles
Notice of proposed rulemaking - The National Highway Traffic Safety Administration (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.
Expodite writes its summary from the official record. The notification and the documents it notifies are on the WTO's own websites.
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