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.

Site Notification

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

Office Safety Checker for Moving Block Train Control Systems

Document Series
Research Results
Author
Federal Railroad Administration
Report Number
RR 23-04
Office
RRS-23
Subject Communications, Train Control
Keywords
Quasi-Moving Block (QMB), Full-Moving Block (FMB), Positive Train Control (PTC)

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 fraDevOps@dot.gov.
Last updated: Friday, May 12, 2023