Instrument capable of measuring speed of vehicles passing along road at speeds between 15 and 70 mph under conditions where flow of traffic is high; it is operated by detector tubes on road and uses ma-sec meter operating on known current to measure time intervals; it includes arrangement of switches and relays to measure speed of vehicles passing over tubes in either direction.
Speedometer [midline ellipsis] for use at high traffic flows
Electronic Eng
Electronic Engineering ; 27 , n 329
1955
3 pages
Aufsatz (Zeitschrift)
Englisch
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