| 摘要 |
PURPOSE: To calculate a separate route with a sufficient difference to the last route result with certainty by referring to the last route searching result at an interval between the same departure and destination, and using a means taking a correspondence with route searching data at present. CONSTITUTION: A route searching means 5 reads route searching data out of a map data storage means 2 and then it compares that whether the same road link with the last route searching result stored by a route control means 7 or not through a link cost renewal part 52. If there is the same link nor, the moving cost of a road link in the route searching data 22 is renewed, and the route searching data renewed in the link cost are processed by a route calculating part 51, whereby a separate route is made selectable. |
