ON-BOARD VEHICLE NAVIGATION APPARATUS

An on-board vehicle navigation apparatus which gives road directions to a driver which accurately describe the road conditions beyond an intersection at which to turn, without causing any confusion even if the route is complicated. A route planning section 9 determines a route based on the current position of the vehicle which is obtained through a current position determination section 2 and a destination assigned by a destination assignment section 10. The guide intersections which form this route are stored in a guide intersection memory 11. A route guidance section 12 continually monitors the current position of the vehicle and announces navigational instructions through a speaker 13 when the vehicle approaches a guide intersection. The type of navigational instruction is changed depending on the distance between the next two guide intersections through which the vehicle will pass.