05303159 is referenced by 63 patents and cites 9 patents.

A vehicle navigation system computes an optimal route for a journey. When the system detects that a vehicle has deviated from the optimal route, information that tells the driver of the deviation of the vehicle is displayed. When the driver turns on a recomputation command switch after reading the information, a new optimal route is computed, with the vehicle's present location as the new starting point. If the vehicle deviates again after computation of the new optimal route, another new optimal route is automatically recomputed, again with the vehicle's present location as the new starting point. The driver is thus freed from having to initiate the recomputation manually.

Title
Navigation system with off-route detection and route recalculation
Application Number
7/869141
Publication Number
5303159
Application Date
April 14, 1992
Publication Date
April 12, 1994
Inventor
Tatsuhiko Abe
Tsurugashima
JP
Haruhisa Tamai
Sunnyvale
CA, US
Agent
Harold R Burstyn
Thomas R Morrison
Assignee
Zexel Corporation Daihatsu Nissan
JP
IPC
G06F 15/50
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