Semaphores provide protection also for motor cars; special arrangements at interlockings; wire distribution; switch protection; track and signal plan of crossing at Mt. Vernon, Ill.
Louisville and Nashville installs automatic block signals on 130 miles of single track
Ry. Signaling
Railway Signaling ; 23 , n 7
1930
4 pages
8 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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