49 C.F.R. § 236.387 Movable bridge locking.
Title 49 - Transportation
Movable bridge locking shall be tested at least once a year.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart C—Interlocking
Inspection and Tests
§ 236.387 Movable bridge locking.