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DE2616149A1
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Road traffic control system - uses road speed detectors and traffic intensity detectors at road intersections to monitor traffic flow
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DE2615121A1
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Vehicle detector with inductive current loop - has loop embedded in road surface and connected to resonance amplifier
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DE2601496A1
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Control unit for traffic control lights - has manually operated circuit for switching traffic phases
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DE2556622A1
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Central control system for traffic lights - has several synchronised control points each with similar series circuit
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DD122438A1
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Device for central control of road traffic in the city
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DE2553105A1
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Clock pulse synchronising cct. for transmitter and receivers - has counted pulses equal to phase shift of receiver clock pulses and start signal
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DD123025A1
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Device for discovering vehicles
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DE2551979A1
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Traffic control system defector and amplifier - has switch controlling ultrasonic generator and master oscillator for precise setting
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HU175663B
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Ultrasonic device for registering road vehicles
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