| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation apparatus and a method of producing an alternative route that can surely avoid congestion and can set alternative routes for avoiding a route that the user does not desire, such as narrow streets. SOLUTION: A congestion section prediction section 20a utilizes congestion information received by a beacon transceiver 15, to predict the expansion and contraction of a congestion section. An alternative route search section 20b searches for a route with an intersection, which is on the side of the estimated congestion section and meets desired conditions that are preset at a setting information storage section 18, as an alternative start intersection. As the desired conditions related to the alternative start intersection, a condition where the intersection is not connected to the narrow street is set, thus preventing the creation of an alternative route that starts making a detour from the intersection connected to the narrow street and passes through the narrow street. COPYRIGHT: (C)2008,JPO&INPIT |
