More centralized traffic control and highway crossing protection but less interlocking, automatic block and spring switches. (see also unsigned article in Ry Signaling v 38 n 1 Jan 1945 p 25-31)
Signal construction less in 1944
Ry Age
Railway Age ; 118 , n 1 ; p 109-114
1945
6 pages
Aufsatz (Zeitschrift)
Englisch
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Signal construction less in 1944
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