Case notes on projects involving centralized traffic control; for each track mile removed, railroads can avoid expenditure of $ 30,000 to lay new rail, get $4,500 to $10,000 salvage value and save about $3000 annually on maintenance.
Modern signaling means fewer tracks
Ry Age
Railway Age ; 139 , n 2
1955
4 pages
Article (Journal)
English
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