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Emergency vehicle control system traffic loop preemption

  • US 7,113,108 B1
  • Filed: 04/08/2003
  • Issued: 09/26/2006
  • Est. Priority Date: 04/09/2002
  • Status: Expired due to Fees
First Claim
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1. A method for preempting traffic signals at an intersection comprising:

  • detecting an emergency vehicle at a first intersection via an embedded inductive traffic loop; and

    invoking a transmitter coupled to the traffic loop for transmitting position information to the emergency vehicle responsive to the detection of the emergency vehicle at the first intersection, the emergency vehicle forwarding the position information to a traffic controller at a second intersection;

    wherein said traffic controller preempts traffic signals for controlling flow of traffic at the second intersection based on information on one or more positions transmitted by the emergency vehicle.

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