Equipment and unique control circuits solve difficult problems on Manufacturers Railway in St. Louis; $9000 saved annually; entire system is meeting need for additional safety to street traffic, number of accidents being decidedly reduced; signals are all controlled automatically by track circuits.
Automatic crossing signals used in congested district
Ry. Signaling
Railway Signaling ; 22 , n 2
1929
3 pages
5 Figs.
Article (Journal)
English
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