Design and operating features of signal system which has aided traffic conditions in Pittsburgh; equipment used; modes of transportation used by patrons and employees of 48 selected stores in entering central business district; location of signal lights; cost of system.
Flexible progressive signal system aids traffic movement in downtown Pittsburgh
Elec. Ry. Jl
Electric Railway Journal ; 74 , n 5
1930
6 pages
13 Figs.
Article (Journal)
English
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