Value of cab signal; effect on track capacity; conclusions. (Abstract.) Paper read before Am. Ry. Assn. (See also Ry. Age vol. 77, no. 15, Oct. 11, 1924 pp. 645-646; and Ry. Rev., vol. 75, no. 18, Nov. 1, 1924, pp. 654-657)
Pennsylvania's experience with automatic stops
Ry. Signaling
Railway Signaling ; 17 , n 10
1924
3 pages
Article (Journal)
English
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