Route guidance for vehicles

  • US 6,917,876 B2
  • Filed: 05/06/2002
  • Issued: 07/12/2005
  • Est. Priority Date: 05/04/2001
  • Status: Active Grant
First Claim
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1. A route guidance system for guiding a driver of a vehicle to a desired destination on a road network, comprising:

  • a central computer adapted to calculate route guidance data providing a route for the vehicle to the desired destination;

    means for supplying the vehicle with the route guidance data calculated by the central computer, providing a channel of communication which is opened to transmit said route guidance data to the vehicle in a short burst and is then closed, so that transmission to the vehicle via said channel ceases, unless and until a need for further transmission via said channel to the vehicle arises;

    means far receiving the route guidance data calculated by the casual computer; and

    means for presenting respective instructions to the vehicle as to the route to be taken to the desired destination.

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