Hudson and Manhattan Railroad
Signal Rules, October 1, 1923
Automatic Signals
Interlocking Signals (1)
Interlocking Signals (2)
Interlocking Signals (3)
Interlocking Signals (4)
Signal Repeaters
Semaphore Interlocking Signals
(Ground Mast Type)
Semaphore Interlocking Signals
(Suspended Mast Type)
Dwarf Signals
Reduce Speed Signals
Resume Speed Markers
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