In this system head-block signals at ends of passing sidings or end of double track are directly controlled by dispatcher from his usual location; component parts of such system are control board with its automatic train graph, signals, power-operated switch machines and track circuits. (See also Ry. Club of Pittsburgh -- Official Proc vol. 27, no. 3, Jan. 26, 1928 pp. 61-74, 3 figs)
The dispatcher controlled signal system for train operation
Railroad Herald
Railroad Herald ; 32 , n 3
1928
2 pages
2 Figs.
Article (Journal)
English
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The dispatcher controlled signal system for train operation
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