Car navigation system prioritizing automatic travel road

Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment

Reexamination Certificate

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Details

C701S201000, C701S208000, C701S207000, C340S988000, C340S995190

Reexamination Certificate

active

07031829

ABSTRACT:
Road map data includes node data indicating a branch point, a junction point, or an intersection point and link data indicating a road between the preceding points. The node data and link data include distances, kinds of the roads, costs based on easiness of traveling. In a route search, a route is selected so that a total cost included in traveling on the route to a destination can be minimum. When command is generated as giving priority to an automatic travel road, costs included in the node and link data that correspond to the automatic travel road are lowered. A route including the automatic travel road is thereby selected in preference to other routes.

REFERENCES:
patent: 5878368 (1999-03-01), DeGraaf
patent: 5931888 (1999-08-01), Hiyokawa
patent: 5991689 (1999-11-01), Aito et al.
patent: 6032098 (2000-02-01), Takahashi et al.
patent: 6295503 (2001-09-01), Inoue et al.
patent: 6484092 (2002-11-01), Seibel
patent: A-9-184738 (1997-07-01), None
patent: A-10-162285 (1998-06-01), None

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