Economic value of spring switches proven by (1) elimination of train stops; (2) elimination of operators; savings made by installation of interlocking plant at track crossings; by installation of automatic block signals to replace manual block signals; replacement of oil lamps by electricity; dispatcher-controlled signal installation. Report before Am. Ry. Eng. Assn. (See also Am. Ry. Assn. -- Signal Section Proc vol. 26, no. 3, Feb. 1929 pp. 623-638, 3 figs)
Economics of railway signaling
Ry. Age (Daily Edition)
Railway Age -- Daily Edition ; 86 , n 9A
1929
Article (Journal)
English
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Economics of railway signaling
Engineering Index Backfile | 1930
Economics of railway signaling
Engineering Index Backfile | 1929
Economics of railway signaling
Engineering Index Backfile | 1930
Economics of railway signaling
Engineering Index Backfile | 1929
Economics of railway signaling
Engineering Index Backfile | 1914
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