Patent ID: 8467962

Claim:
A navigation system comprising: a display device that displays a lane guidance map representing direction of lanes of a road; and a processing device that controls the display device to display the lane guidance map, the processing device including: a map data acquiring unit configured to acquire map data; a lane direction determining unit configured to select one of determination processes to determine direction of arrows to be displayed on the lane guidance map, wherein the selection is made in accordance with a road type of an incoming road coming into an intersection defined by the map data acquired by the map data acquiring unit and a number of outgoing roads extending from the intersection, wherein the direction of the arrows represent direction of lanes in the outgoing roads, and wherein the determination processes include a determination process using connection angles between the incoming road and the outgoing roads and another determination process using both road types and the number of the outgoing roads, and determine the direction of the arrow to be displayed in the lane guidance map in accordance with the selected determination process; and a lane information display unit configured to display the arrows representing the direction of the lanes of the outgoing roads on the lane guidance map in accordance with a result of the determination of the lane direction determining unit.