49 CFR § 236.307 Rules, Standards, and Instructions Governing the Installation, Inspection, Maintenance, and Repair of Signal and Train Control Systems, Devices, and Appliances

§ 236.307 Indication locking.

Current through Sep 25, 2026 · Read all of Part 236

Indication locking shall be provided for operative approach signals of the semaphore type, power-operated home signals, power-operated switches, movable-point frogs and derails, and for all approach signals except light signals, all aspects of which are controlled by polar or coded track circuits or line circuits so arranged that a single fault will not permit a more favorable aspect than intended to be displayed.

[49 FR 3385, Jan. 26, 1984]

← § 236.306 Facing point lock or switch-and-lock movement.§ 236.308 Mechanical or electric locking or electric circuits; requisites. →