Plentiful supply of simple and easily understood signals coupled with complete supervisory system constitutes what is regarded as one of best traffic-control systems in existence; 4 kinds of traffic signals used; accident emergency trucks; fire alarms; signal voltage supply; traffic officer's signal station; supervisory control of lights; momentary contact relays. (see also Tech. Eng., News, vol. 9, no. 6, Nov. 1928, pp. 243-245, 6 figs)
Traffic control. Holland tunnel traffic control system
Elec. Rec
Electrical Record ; 43 , n 2
1928
3 pages
3 Figs.
Article (Journal)
English
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