Route search and navigation apparatus and storage medium storing

Details Route search and navigation apparatus and storage medium storing Route search and navigation apparatus and storage medium storing

1998-04-08

2000-08-08

Issing, Gregory C.

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

340995, G01C 2100, G08G 1123

Patent

active

061014435

ABSTRACT:
The present invention prevents execution of a detour route search, responsive to and in accordance with received VICS data, where certain conditions are not met. To this end, the system of the invention calculates a time RT1 required for a vehicle to move from its present location to a first point where the vehicle must turn to the right or left to follow a previously determined guidance route and also calculates a time CT required to conduct a route re-search based on the received VICS data. If RT1.ltoreq.CT the system then performs a route re-search based on the received VICS data. On the other hand, if RT1<CT execution of the route re-search is prohibited.

REFERENCES:
patent: 5406490 (1995-04-01), Braegas
patent: 5612882 (1997-03-01), LeFebvre et al.
patent: 5892463 (1999-04-01), Hikita et al.
patent: 5904728 (1999-05-01), Tamai et al.

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