An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
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.
Notice.
This document provides the public notice that by letter dated December 26, 2024, the Association of American Railroads (AAR) petitioned FRA for an extension of relief from certain regulations concerning rail cars equipped with end of car cushioning units.