It is well known that the vehicle with smaller sideslip angle has better performances than larger one. The authors have analyzed its reason using the different sideslip angle vehicles at driving simulator. It is found that the overshoot at the end of lane change is affected by the sideslip angle .The reason of the overshoot is that the driver adapts the steering angle to the route angle. The best position of yaw- center is located between the center of gravity and rear wheel.