| 摘要 |
A route search system includes a map data storing means 2 storing a roadmap data containing, as the attribute of a road, whether the road is a road located within a flat-rate pay area where a fixed fare is charged on a mobile unit regardless of the number of times the mobile unit enters the area if the entries are made within a fixed time period; a flat-rate pay area transit recording means 4b, when the current position detected by a position detecting means 1 comes to a road in the flat-rate pay area represented by the attribute of the roadmap data stored in the map data storing means, storing that the mobile unit has transited the flat-rate pay area; an input means 3 inputting whether to permit transit across the flat-rate pay area; and a route calculating means 4a, when it is inputted by the input means that the transit thereof is not permitted, if the flat-rate pay area transit recording means stores that the mobile unit has transited the flat-rate pay area, calculating the optimum route to the destination within routes also containing roads located within the flat-rate pay area on the basis of the roadmap data stored in the map data storing means.
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