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Passive road sensor for automatic monitoring and method thereof

  • US 6,137,424 A
  • Filed: 01/15/1999
  • Issued: 10/24/2000
  • Est. Priority Date: 07/19/1996
  • Status: Expired due to Fees
First Claim
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1. A system for passively monitoring traffic flow and adherence to traffic laws and regulations comprising:

  • a passive road sensor comprising;

    an acoustic signal generator installed in or on the road surface; and

    a detector to detect an acoustic signal generated from impact of wheels of a vehicle to the generator as the vehicle is driven over the generator and conducted through the generator to the detector.

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