Recent signal surveys reveal progressive systems speeding up traffic 25 to 50 per cent; important operating economies; typical results of signal re-designs.
Transportation methods needed for traffic signaling
Elec. Traction
Electric Traction ; 26 , n 5
1930
5 pages
7 Figs.
Article (Journal)
English
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Increased transportation rates and needed facilities
Engineering Index Backfile | 1913