Route guidance system and route guidance method

摘要

A route guidance system includes a current position detection portion that detects a current position of a host vehicle as a host vehicle position; a route search processing portion that searches for a specified route to a destination, based on the host vehicle position; a recommended lane setting processing portion that sets a recommended lane based on the specified route; a host vehicle position inference processing portion that infers whether or not the host vehicle is in the recommended lane, based on image data of lane demarcation lines; a driving lane assumption processing portion that assumes that the lane in which the host vehicle is driving is the driving lane, based on the inference results of whether or not the host vehicle is in the recommended lane; and a lane guidance processing portion that executes lane guidance based on the assumed driving lane. Appropriate lane guidance can be executed, because the driving lane is assumed based on the inference results of whether or not the host vehicle is in the recommended lane.