05550538 is referenced by 51 patents and cites 7 patents.

A navigation system mounted on a vehicle computes in advance an optimal route from a starting point to a destination. When the vehicle travels off the optimal route, the navigation system detects an off-route deviation. When an off-route deviation is detected, the system computes a restoration route from the vehicle's present position to a selected point on the optimal route and rapidly displays navigational information to guide the vehicle thereto. Thus there is no need for the system to compute a new optimal route from the present position to the destination, and there is no delay in supplying the driver with navigational information.

Title
Navigation system
Application Number
91761
Publication Number
5550538
Application Date
October 31, 1994
Publication Date
August 27, 1996
Inventor
Tatsuhiko Abe
Saitama
JP
Takao Fujii
Cupertino
CA, US
Agent
Thomas R Morrison
Alfred W Froebrich
Christopher R Pastel
Assignee
Zexel Corporation
JP
IPC
G08G 1/123
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