49 C.F.R. § 236.22
Semaphore signal arm; clearance to other objects.
Cite as 49 C.F.R. § 236.22 (2026)
At least one-half inch clearance shall be provided between semaphore signal arm, and any object that may interfere with its operation.
49 C.F.R. § 236.22
Cite as 49 C.F.R. § 236.22 (2026)