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 Elec. Rec vol. 43, no. 2, Feb. 1928 pp. 188-190, 3 figs)
Traffic control. Holland tunnel traffic control system
Tech. Eng., News
Tech Engineering News ; 9 , n 6
1928
3 pages
6 Figs.
Article (Journal)
English
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Traffic control. Holland tunnel traffic control system
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