Tracking control of a four-wheeled vehicle in response to changes in road conditions

According to the National Police Agency, there has been an increase in the number of automobile crash victim; therefore, it is necessary to manufacture vehicles that anybody can safely drive. Even if such vehicles are possible, drivers still may drive dangerously. Therefore, plans to reduce driver overconfidence are necessary. The road surface conditions on the right side of a vehicle may differ from those on the left side. If vehicle speed is too fast, the vehicle may spin out of control. We investigate trajectory tracking control for four-wheeled vehicles using our proposed sliding-mode control method.