By installation of centralized traffic control, train time has been reduced on single track freight cut-off 28.6 mi long, between Pymatuning, Pa, and Leavittsburg, Ohio; manual block replaced by centralized traffic control; semi-automatic signaling.
Centralized traffic control on Erie
Ry Signaling
Railway Signaling ; 35 , n 4
1942
2 pages
Article (Journal)
English
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