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Method and system for route calculation that avoids railroad crossings

  • US 6,751,549 B1
  • Filed: 01/17/2002
  • Issued: 06/15/2004
  • Est. Priority Date: 01/17/2002
  • Status: Expired due to Term
First Claim
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1. A method of providing a user of a motor vehicle with a route to a destination using a vehicle navigation system, comprising the steps of:

  • receiving input from the user that indicates a destination;

    accessing a geographic database to obtain data that represent roads in a region in which the motor vehicle is operating, wherein said data that represent roads include data that indicate railroad crossings along said roads; and

    determining a route to the destination by selecting portions of roads to form a continuous path to the destination, wherein during the step of selecting, portions of roads that have railroad crossings are suppressed from inclusion in said route.

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