Automatic block signaling includes speed control by signal indication and automatic train stop, also pantograph detector, while large interlocking control includes turn-push levers, power-off pushbutton to protect route locking, and emergency control of switches.
New signaling and interlocking on east Boston rapid transit
Ry Signaling Communications
Railway Signaling and Communications ; 45 , n 11
1952
8 pages
Aufsatz (Zeitschrift)
Englisch
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