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Method for operating a navigation system for a vehicle

  • US 6,711,498 B1
  • Filed: 07/12/2002
  • Issued: 03/23/2004
  • Est. Priority Date: 09/08/1999
  • Status: Expired due to Fees
First Claim
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1. A method for operating a navigation system of a vehicle, comprising:

  • calculating a travel route in a computing circuit on the basis of a location of the vehicle, a digitally stored map, and a destination location;

    communicating the travel route to a vehicle driver as at least one of an acoustical message and a visual message;

    acquiring traffic information relevant to the travel route via a receiver unit;

    calculating a new travel time resulting from the traffic information and for the travel route in accordance with a weighting factor for a disturbance event and in accordance with a length of a traffic disturbance, the weighting factor for the disturbance event varying in accordance with a type of disturbance event;

    calculating a second travel time in the same manner for an alternative route;

    communicating at least one of the second travel time of the alternative route and the alternative route to the vehicle driver as at least one of an acoustical message and a visual message, if the second travel time is shorter than the new travel time of the travel route;

    ascertaining a correction value for predefined weighting factors on the basis of the length of the traffic disturbance; and

    ascertaining a corrected weighting factor as a function of the correction value;

    wherein;

    the new travel time is calculated using the corrected weighting factor;

    the correction value is ascertained in accordance with one of a family of characteristics and a predefined formula the corrected weighting factor is calculated according to the formula Gk=Gf

    K, with K=Ls/100*n, Gk being the corrected weighting factor, Gf being the weighting factor for the disturbance event, K being the correction value, Ls being the length of the traffic disturbance, n being greater than or equal to 1, the alternative route being automatically calculated if Gk is less than or equal to 0.

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