To present information for notifying a deceleration start time point and guiding a driver's driving behavior for deceleration.
According to history information on a driver's driving behavior pattern, an optimum braking operation start point and an optimum vehicle speed at a pre-curve fixed decelerated speed point are set for travel through a curve on a course (Step S1 to S10). When the vehicle reaches a point corresponding to the optimum braking operation start point, a buzzer is sounded to notify a braking operation start, and the buzzer sound is lowered with reducing vehicle speed, so that the driver can recognize by the buzzer sound volume a speed difference from the optimum vehicle speed, which is a deceleration target. The current position of the vehicle is also displayed between the point corresponding to the optimum braking operation start point and a point corresponding to a group-standard pre-curve fixed decelerated speed point, so that the driver can recognize by the display a remaining distance to the point corresponding to the group-standard pre-curve fixed decelerated speed point (Step S11, S12).
TAKADA YASUSHI
SHIMOYAMA OSAMU
Yoshiaki Naito
Cui Shu Tetsu
Toru Miyasaka