56-lever interlocking installed in Los Angeles; track layout includes junction between double-track main line, and double-track freight cut-off line; signals are Union Switch and Signal Co search-light type designed for low-voltage operation, and equipped with double-filament lamps rated at 13.5-3.5 watts.
Electric interlocking on Southern Pacific
Ry Signaling
Railway Signaling ; 27 , n 12
1934
Article (Journal)
English
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