More interlocking, spring switches and centralized traffic control, but less highway crossing protection.
Signaling construction increased in 1943
Ry Age
Railway Age ; 116 , n 1
1944
5 pages
Article (Journal)
English
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Signaling construction increased in 1943
Engineering Index Backfile | 1944
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Increased signaling construction in 1940
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|Signaling construction increased in 1937
Engineering Index Backfile | 1938
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