Flexibility of control makes possible economical operation of through and suburban passenger and freight service; track and signal plan; power supply; characteristics of interlocking stations and control machines.
All relay interlocking expedites traffic on Boston and Maine
Ry. Signaling
Railway Signaling ; 24 , n 5
1931
4 pages
7 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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