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Sign text display for vehicle navigation system

  • US 5,974,357 A
  • Filed: 12/19/1996
  • Issued: 10/26/1999
  • Est. Priority Date: 12/19/1996
  • Status: Expired due to Term
First Claim
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1. A method of displaying a guided route in a vehicle navigation system, the guide route being a linked series of road segments, the guided route including a destination street that is not a freeway and at least first and last road segments that are freeway connector road segments, there being stored sign text associated with the road segment, the method comprising the steps of:

  • (a) determining if the vehicle has passed a first decision point that is a bifurcation of a freeway on the guided route;

    if it is determined that the vehicle has passed the first decision point, then;

    (b) determining if a last freeway connector road segment on the guided route is designated in a sign text associated with a freeway connector road segment immediately prior to a last freeway connector road segment on the guided route;

    (c) if step (b) is determined to be true, then displaying the sign text associated with a last freeway connector road segment on the guided route; and

    (d) if step (b) is determined to be false, then displaying a sign text data associated with the freeway connector road segment immediately prior to the last freeway connector segment on the guided route.

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