Grade crossing with Chicago, St. Paul, Minneapolis and Omaha, gauntlet drawbridge, and junction switches controlled by table interlocking machine; mechanical gate protection solves light-traffic crossing problem.
Chicago, St. Paul, Minneapolis and Omaha eliminates nearly 20,000 train stops annually
Ry. Signaling
Railway Signaling ; 24 , n 10
1931
5 pages
8 Figs.
Article (Journal)
English
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