Patent ID: 6581001
Filing Date: 2003-06-17
Classification: G01C

Abstract:
A vehicle-mounted navigation system which detects a current position of a vehicle and retrieves a route to a set destination, thereby guiding the vehicle along the route, the system comprising:a route setting device into which there is entered route setting information desired by a user, said route setting information including a starting location, a destination, and an en route point; a time setting device into which there are entered a scheduled time at which the vehicle is to depart the starting location and a period of stopping at the en route point entered to the route setting device, wherein said time setting device sets departure time as a current time if the department time is not entered; a route retrieval device which retrieves a route, to the destination, in accordance with the route setting information entered to the route setting device; and an arrival time computation device which computes a time, at which the vehicle is to arrive at the destination, on the basis of the route retrieved by the route retrieval device, and on the basis of the period of stopping and one of the scheduled departure time and the current time, entered to the time setting device; wherein the route retrieval device preserves at least one route previously utilized by the user as a route history list, prioritizes the at least one route previously utilized by the user in the order of frequency with which the at least one route is used, and retrieves a route having the highest priority from the at least one route preserved in the route history list having the same destination as that entered by the user.