US Patent 10325494 Route guidance device and route guidance method

A route guidance unit includes: a position detection unit configured to detect a position of a host vehicle and a travel lane; a determination unit configured to determine whether the host vehicle should change the travel lane detected by the position detection unit to another lane so as to travel toward a branch point or an intersection on the travel route; and a guide unit configured to provide guidance to change lanes, wherein, when the determination unit determines that the host vehicle should change the travel lane to other lanes sequentially several times, the guide unit provides first guidance at a point at which a distance from the position of the host vehicle to the branch point is shorter than a distance obtained such that a predetermined distance is multiplied by the number of lane changes.