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.
This technical bulletin is also Operating Practices Agency Interpretation OPAI-05-01 which is
being distributed to our rail industry customers through the Association of American Railroads,
the United Transportation Union, the Brotherhood of Locomotive Engineers (including the
American Train...
1. Yardmasters
2. Train and Engine Service Employee Tie-ups After Maximum Statutory On-duty Time
3. Bridgetenders
4. Relaying "Orders" between Railroad Employees
5. Flaggers
Also OPSA-96-03
• Circumstances Permitting Relief of Rear-End Flag Protection
• One Train Following Another at Restricted Speed
• Use of Radio Communication between Trains to Afford Relief of
Rear-End Flag Protection in Non-Signaled Territory