Trains directed by signal indication in either direction on both tracks of busy double-track line; 13 1/2mi. double-track installation of General Railway Signal Co.'s centralized traffic control was placed in service between North Chelmsford, Mass., and Ayer; annual saving $37,847; general layout and traffic; track layout and signaling. (See also Ry. Age vol. 86, no. 23, June 8, 1929 pp. 1316-1318, 5 figs)
The Boston and Maine installs centralized control to increase track capacity
Ry. Signaling
Railway Signaling ; 22 , n 7
1929
4 pages
8 Figs.
Article (Journal)
English
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The Boston and Maine installs centralized control to increase track capacity
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