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CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 200–269) > PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES > SUBPART A—Rules and Instructions: All Systems (§236.1 to §236.110) > 236.22—Semaphore signal arm; clearance to other objects.
236.22—Semaphore signal arm; clearance to other objects.
At least one-half inch clearance shall be provided between semaphore signal arm, and any object that may interfere with its operation.