Illinois Central installs colored light signals on 20 miles of double track with no normal direction. (See also Ry. Signaling vol. 18, no. 4, Apr. 1925 pp. 139-141, 7 figs)
Signaling two tracks to capacity
Ry. Age
Railway Age ; 78 , n 15
1925
3 pages
5 Figs.
Article (Journal)
English
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Signaling two tracks to capacity
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