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

**Action Urgency Score:** 20/100

| Field | Value |
|---|---|
| Agency | Transportation Department; National Highway Traffic Safety Administration |
| Type | Proposed rule |
| Action | Extension of comment period. |
| Published | 2026-07-28 |
| Effective | 2026-06-26 |
| Comments close | 2026-08-26 |
| Significant | No |
| CFR parts | 49 CFR 571 |
| Summary | 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. |
| Document number | 2026-15231 |

## Why this score


Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/07/28/2026-15231/federal-motor-vehicle-safety-standards-modernization-of-fmvss-no-135-to-accommodate-ads-equipped). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.