Installation at De Graff, Ohio, where complete interlocking layout, including two crossovers and four passing-track switches with accompanying signals, is controlled remotely, by means of coded-line circuits, from CTC type of machine in tower 3.5 mi away; saves $6000 annually in operating expenses as compared with locally operated interlocking plant.
Big four uses centralized control for remote interlocking
Ry Signaling
Railway Signaling ; 25 , n 3
1932
2 pages
Article (Journal)
English
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