USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Addresses the importance of clear, precise, unambiguous railroad safety procedures to ensure the safety of highway-rail grade crossing warning systems or wayside signal systems that are temporarily removed from service

Document Series
Safety Advisories
Safety Advisory Number
Subject Highway-Rail Grade Crossings, Signal and Train Control
Highway-Rail Grade Crossing Warning Systems; wayside ; credible warning ; warning system
sa0403.pdf (9.91 KB)

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact
Effective Date: Wednesday, August 11, 2004