Large electropneumatic interlocking, with "UR" route control installed at Westchester Yard, in Borough of Bronx, New York City; features of plant include, electronic smoke detector, call-on controls, biased neutral switch control relay circuits and automatic d-c ground detectors.
Route type interlocking on New York subway
Ry Signaling Communications
Railway Signaling and Communication ; 43 , n 11
1950
6 pages
Article (Journal)
English
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