Patent ID: 8862372

Claim:
An intersection stoppage ratio specifying device comprising: a drive history data storage unit that stores drive history data of a probe car; a traffic signal intersection information storage unit that stores information related to traffic signal intersections; a target intersection selecting unit that selects, as a target intersection, the traffic signal intersection, for which a stoppage ratio is specified, from the traffic signal intersection information storage unit; a passing-through intersection extracting unit that extracts, as a passing-through intersection, the traffic signal intersection, which the probe car passes immediately before the probe car reaches the target intersection, based on a predetermined rule; a route-based classifying unit that classifies the drive history data for each route that runs from the passing-through intersection to the target intersection; and a stoppage ratio specifying unit that specifies the stoppage ratio for each classified route, the stoppage ratio being a ratio of the probe car stoppage at the target intersection.