System tried within several blocks on Fifth Avenue, New York; it is claimed signals will do away with thousands of unnecessary disputes which occur daily at street intersections between drivers and traffic policemen, where it is usually claimed by driver that he did not see raised hand of officer; traffic is halted by red hand instead of red disk.
New pedestrian-vehicular traffic control signals
Safety Eng
Safety Engineering ; 67 , n 1
1934
2 pages
Aufsatz (Zeitschrift)
Englisch
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