| 摘要 |
PROBLEM TO BE SOLVED: To reduce course deviations at right- and left-turn intersections, which can easily cause course deviations. SOLUTION: In the case that a self vehicle has deviated off course, navigation systems 10 mounted to vehicles 1-3 transmit data specifying the right- and left-turn intersection at which the self vehicle has deviated off course to a server 30. The server 30 accumulates a plurality of items of the data transmitted from each navigation system 10 as data on right- and left-turn intersections at which vehicles can easily deviate off course. At the computations of route guidance, each navigation system 10 receives the data on right- and left-turn intersections at which vehicles can easily deviate off course from the server 30 and computes such route guidance as to avoid right- and left-turn intersections at which vehicles can easily deviate off course. COPYRIGHT: (C)2006,JPO&NCIPI |
