It is known that we cannot control a 2nd order delay system. The reason why we can control the lateral motion in the driving in spite of its delay effect is that we can get the advanced information for compensate the delay from the yaw angle or the pass angle. In this paper the authors study the effects of displaying the vehicle direction information to the driver for assist the driving. The results show that the displayed information changes the driving easily. The effect of the pass angle display is not so good because of its delay. The information of advanced pass angle gives the vest effect.