Final rule · 2026-08258

Regulatory Relief To Allow Speeds Up to 45 MPH for Non-Traversable Curbs

This rule revises the definition of a non-traversable curb in FRA's train horn regulation in conformance with five longstanding FRA waivers that allow highway speeds up to 45 miles per hour (mph) where these highway curbs are present in quiet zones established and maintained in accordance with the regulation.