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Traffic light control system and method

  • US 4,908,615 A
  • Filed: 08/09/1988
  • Issued: 03/13/1990
  • Est. Priority Date: 06/26/1987
  • Status: Expired due to Term
First Claim
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1. A traffic light control system, comprising:

  • (a) a transmitter/receiver, said transmitter/receiver for transmitting a beam towards a roadway, detecting reflections of said beam from vehicles on said roadway, and outputting a detection signal; and

    (b) circuitry connected to said transmitter/receiver, said circuitry converting said detection signal into traffic light control signals;

    (c) said transmitter/receiver including an array of active antennas, each of said active antennas having;

    i. an oscillator including a power source and a resonator; and

    ii. a radiator coinciding with said resonator;

    (d) said transmitter/receiver further including interconnections among said active antennas, said interconnections coupling said active antennas together.

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