Value of cab signal; effect on track capacity; conclusions. (Abstract.) Paper read before Am. Ry. Assn. (see also Ry. Signaling, vol. 17, no. 10, Oct. 1924, pp. 391-393; and Ry. Rev., vol. 75, no. 18, Nov. 1, 1924, pp. 654-657)
Pennsylvania's experience with automatic stops
Ry. Age
Railway Age ; 77 , n 15
1924
2 pages
Article (Journal)
English
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