| 摘要 |
<p>A storage part (21) stores beforehand, as an energy consumption graph (32), amounts of energy consumed by a vehicle traveling in both directions along road links on a map (31). A processing part (12) traces a road link from a specified start point location peripherally, calculates, for each road node (A-F), a first and second integration values obtained by integrating amounts of energy in a direction moving away from the start point location on the energy consumption graph (32) and in a direction moving toward the start point location on the energy consumption graph, and based on a relationship between the sum of the first integration value and the second integration value, and a given specified amount of energy for each road node (A-F), decides a round-trip traveling range which is a range within which the vehicle is able to return to the start point location by using the specified amount of energy.</p> |
