Subjgrp 113. Standards
- § 236.301 - Where signals shall be provided.
- § 236.302 - Track circuits and route locking.
- § 236.303 - Control circuits for signals, selection through circuit controller operated by switch points or by switch locking mechanism.
- § 236.304 - Mechanical locking or same protection effected by circuits.
- § 236.305 - Approach or time locking.
- § 236.306 - Facing point lock or switch-and-lock movement.
- § 236.307 - Indication locking.
- § 236.308 - Mechanical or electric locking or electric circuits; requisites.
- § 236.309 - Loss of shunt protection; where required.
- § 236.310 - Signal governing approach to home signal.
- § 236.311 - Signal control circuits, selection through track relays or devices functioning as track relays and through signal mechanism contacts and time releases at automatic interlocking.
- § 236.312 - Movable bridge, interlocking of signal appliances with bridge devices.
- § 236.313 - [Reserved]
- § 236.314 - Electric lock for hand-operated switch or derail.