| 摘要 |
PROBLEM TO BE SOLVED: To provide an on-vehicle navigator capable of calculating the time needed for reaching a destination much more accurately at the time of seaching for a guiding route, and capable of searching for a guiding route which makes it possible to reach the destination in the shortest time. SOLUTION: Link travel times are extracted out of a light beacon or wave beacon received by a beacon receiver 5 or traffic information received through the medium of an FM multiplex broadcast received by an FM multiplex receiving unit 6 are stored in a memory. In this memory, the average values of the link travel times in the past four weeks, for example, are stored separating them at every ten minutes. A navigator body 1 calculates a required time up to a destination, on the basis of the latest traffic information received by the aid of the beacon receiver 5 or FM multiplex receiving unit 6. And, in the case of one hour or less for example, a guiding route is searched using the latest traffic information, and in the case of more than one hour a guiding route for the part exceeding one hour is searched using data stored in the memory. |
