New selective automatic features, faster manual controls, and more compact control machines, are aids in extending areas in which all interlockings can be consolidated, or increasing mainline mileage which can be controlled from one centralized traffic control machine.
Much is new in signaling for 1956
Ry Signaling Communications
Railway Signaling and Communications ; 49 , n 1
1956
Aufsatz (Zeitschrift)
Englisch
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Much ahead in modern signaling
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