Patent ID: 7532980

Claim:
A navigation system for a vehicle, the navigation system comprising: a route retrieval unit which retrieves routes to a destination under a plurality of predetermined retrieval conditions, the retrieval conditions including a reach time-first retrieval condition under which a route is retrieved with priority given to a reach time required to reach a designation, and a distance-first retrieval condition under which a route is retrieved with priority given to a distance to a destination; a route guide unit that indicates, as a guide route, a route selected by a user from the routes retrieved under the plurality of predetermined retrieval conditions; a memory unit which stores, among the plurality of retrieval conditions, a retrieval condition under which the route selected by the user is retrieved; a traffic information acquisition unit that externally acquires traffic information; a dynamic route retrieval unit that retrieves a dynamic route, which bypasses a zone affecting driving of the vehicle, when recognizing the zone affecting driving along the guide route based on the acquired traffic information, the dynamic route being retrieved under the same retrieval condition which is stored in the memory unit and under which the guide route being indicated by the route guide unit is retrieved by the route retrieval unit; and a new route designation unit that designates, as a guide route, the dynamic route retrieved by the dynamic route retrieval unit.