| 摘要 |
<p>PROBLEM TO BE SOLVED: To search for a path based on the remaining amount of a prepaid charged facility charge by obtaining a sum that can be paid of a charged facility and searching for a path within the sum. SOLUTION: In a navigation ECU 10, a map information storage part 12 stores map information and a toll road information storage part 14 stores the charge of a toll road. Also, the current location of an own vehicle is calculated from information that is acquired by a GPS antenna 16, a destination is inputted from an input part 18, and a path from the current location to a destination is searched for. Then, an output device 20 performs display being superposed on a map being read from the map information storage part 12. On the other hand, a vehicle-mounted machine 22 of an automatic charge collection system reads the remainder of a card that a driver has purchased with a specific sum in advance, and the ECU 10 reads the remainder. In this case, when the combination of sections for utilizing the road of the search path and the charge for each combination are calculated and the remainder is higher than the least expensive section charge and the charge of the section is the maximum, the path is determined as the search path. When the remainder does not meet the section charge, it is reported that the remainder is in shortage.</p> |
