초록 ▼

A route guidance section compares the current position provided by a current position determination section and the route provided by a route calculation section for detecting an off-route condition. When the off-route condition is detected, a re-searching key as well as the route and current place

A route guidance section compares the current position provided by a current position determination section and the route provided by a route calculation section for detecting an off-route condition. When the off-route condition is detected, a re-searching key as well as the route and current place is displayed on a display section. When the re-searching key is touched, a search is again made for a new route from the current position to the destination. Then, route guidance is again started in response to the re-searching result. When the re-searching key is not touched, the route and current place continue to be displayed while the vehicle carrying the apparatus travles off route, thereby efficiently preventing the apparatus from executing unnecessary re-searching when the driver drives the vehicle off route on purpose.

대표청구항 ▼

[ What is claimed is:] [1.] A vehicle navigation system for informing a driver of a vehicle of a current position of the vehicle, comprising:a current position detector for detecting a current position of the vehicle on a first road;a map information memory for storing information concerning road po

[ What is claimed is:] [1.] A vehicle navigation system for informing a driver of a vehicle of a current position of the vehicle, comprising:a current position detector for detecting a current position of the vehicle on a first road;a map information memory for storing information concerning road positions;an adjacent road detector for detecting whether a second road adjacent to the first road on which the detected current position of the vehicle is located exists based on the current position of the vehicle detected from the current position detector and road information obtained from the map information storage,wherein the detection result of the adjacent road detector is used for specifying the current position of the vehicle.