Interstate Commerce Commission has released annual tabulation of statistics pertaining to extent of use of block signals, train control systems, railroad grade crossing and gauntlet protection, centralized and remote control, and telegraph and telephone, on railroads of United States, as of January 1, 1931; tables giving signaling installations, since Jan. 1, 1931.
I.C.C. reports annual signal statistics
Ry. Signaling
Railway Signaling ; 24 , n 10
1931
6 pages
1 Fig.
Article (Journal)
English
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