Increased safety and flexibility of operation, and high return on investment have amply warranted expenditure of $18,000; solution of problem; operation of system; color-light signals and dual-control switch machines; economies effected.
Chicago Great Western saves $7000 annually by remote control of tunnel interlockings
Ry. Age
Railway Age ; 90 , n 22
1931
2 pages
3 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
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