U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
At least one-half inch clearance shall be provided between semaphore signal arm, and any object that may interfere with its operation.
Regulations most recently checked for updates: Aug 27, 2025
At least one-half inch clearance shall be provided between semaphore signal arm, and any object that may interfere with its operation.