Patent ID: 8825354

Claim:
A system for supporting a user of an electrically driven vehicle, comprising: a position information obtaining unit configured to obtain, during traveling, position information indicating a position of the vehicle; an electric power amount estimating unit configured to estimate, during traveling, a remaining electric power amount of an electric power source of the vehicle; a shortage risk estimating unit configured to estimate, during traveling, an estimated risk of electric power amount shortage on a basis of the estimated remaining electric power amount; a notifying unit configured to notify a user in case the estimated risk of electric power amount shortage estimated by the shortage risk estimating unit exceeds a predetermined threshold; a traffic information acquiring unit configured to acquire traffic information; wherein the required electric power amount estimating unit is configured to estimate a required electric power amount on a basis of traffic information acquired by the traffic information acquiring unit, and/or the shortage risk estimating unit is configured to estimate the estimated risk of electric power amount shortage on the basis of traffic information acquired by the traffic information acquiring unit; and a route calculation unit configured to calculate travel routes from a determined position to a destination position, wherein when the shortage risk estimating unit estimates that the estimated risk of electric power amount shortage exceeds a predetermined threshold due to traffic conditions on a current route which are indicated in the traffic information, the route calculation unit is configured to calculate one or more alternative routes from the determined position to the destination position, and the required electric power amount estimating unit is configured to estimate, for each of the one or more alternative routes, an alternatively required electric power amount required for traveling with the vehicle from the determined position to the destination position along the respective alternative route, and the shortage risk estimating unit is configured to estimate, for each of the one or more alternative routes, a respective estimated risk of electric power amount shortage on the basis of the remaining electric power amount and the alternatively required electric power amount.