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Emergency vehicle traffic signal preemption system

  • US 6,940,422 B1
  • Filed: 08/15/2003
  • Issued: 09/06/2005
  • Est. Priority Date: 08/15/2002
  • Status: Active Grant
First Claim
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1. An emergency vehicle traffic signal preemption system;

  • an intersection communications controller at each intersection for preemption;

    a traffic light controller receiving inputs from said communications controller to control the operation of traffic lights and pedestrian lights at an intersection;

    a transceiver for receiving information from an emergency vehicle and transmitting information about the status of an intersection;

    a real-time status monitor for monitoring status at a selected intersection and verifying preemption of the intersection, said status monitor relaying said status information at said intersection to said communications controller;

    a transponder in each emergency vehicle receiving said status information being transmitted by said intersection transceiver, said transponder including a transceiver for transmitting emergency vehicle data to said intersection communications controller;

    a display in said emergency vehicle displaying the status of said intersection and other emergency vehicles responding to an emergency;

    whereby said emergency vehicle traffic signal preemption system operates autonomously by transmissions to and from said emergency vehicle and intersection.

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