NAVIGATION SYSTEM

PURPOSE:To reduce the driving trouble of a driver and eliminate the need for complicate key switch operation by letting the driver know the driving direction at an intersection within road map information in front of the intersection by voice and a driving direction display. CONSTITUTION:When the automobile reaches the intersection 122, an MPU31 calculates the driving direction of the automobile and the target destination direction of a target destination 130 from the intersection 122 on the basis of outputs of direction sensors 2 and 3. When the target destination direction is set to 0 deg., the angle difference between the target destination 131 and driving direction 132 is 90 deg. in this example. Then, the target destination direction 131 is set to 0 deg. as shown in a figure and the zone is divided roughly into three. In this example, the angle difference between the target destination direction 131 and driving direction 132 at the intersection 122 is 90 deg. and a right turning zone corresponds to the angle difference. Thus, the zone that the automobile should enter is determined as a result of arithmetic, and then the MPU31 send a corresponding code among a straight-movement, a right turning, and a left turning code stored in a ROM33 to an amplifier through an input/output LSI34 and an interface 54 to let the driver know the driving direction by voice output from a speaker and a driving direction display.