POSITION-ESTIMATING DEVICE, POSITION-ESTIMATING SYSTEM, POSITION-ESTIMATING METHOD, AND POSITION-ESTIMATING PROGRAM

摘要

A curvature calculator (203) calculates host vehicle curvature using host vehicle information (501). Also, the curvature calculator (203) calculates an other vehicle curvature using other vehicle information (502). The curvature calculator (203) calculates the curvature between two vehicles found from the relative position between the host vehicle and the other vehicle using the host vehicle information (501) and the other vehicle information (502). A curvature comparator (204) compares the host vehicle curvature or the other vehicle curvature with a position-determining condition determined using the curvature between two vehicles. An estimating unit (205) estimates that the relative position between the host vehicle and the other vehicle is in a curve-facing position that faces the curve when the host vehicle curvature or the other vehicle curvature meets the position-determining condition.