Arrangement of electric interlockings controlled by NX machine, installed by Missouri Pacific at Little Rock, Ark, freight yard; operations of 3-mi long yard are controlled from telegraph operator's room in yard office; about 3610 cars are handled daily.
Interlocking: NX plant cuts train delay
Ry Signaling Communications
Railway Signaling and Communications ; 47 , n 9
1954
3 pages
Article (Journal)
English
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