New York, New Haven and Hartford Railroad has completed initial section of extended territory on which color light signals are to replace three-aspect semaphores; fourth and fifth aspect required where distances are short between inter-lockings in dense traffic territory; new system obviates line control wires as aid in conservation of critical war materials.
New Haven installs five-aspect signaling controlled by coded track circuits
Ry Signaling
Railway Signaling ; 36 , n 1, Part 1
1943
8 pages
Article (Journal)
English
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