Control of safety distance between vehicles. Trailer tow rope is used to prevent rear-end, needs to grasp the distance and speed. The length of the tow rope at about 5~10 m, so the distance between vehicles should be controlled in the tow rope within range, keep the tow rope in tension. Speed below 20 km/h when the trailer.
Moving vehicles should be open before and after double flashing warning lights along the outside lane, behind the tractors can also be pasted "trailers" logo sign other vehicles to drive.