Outline marks account for a small proportion of traffic safety facilities, but their role cannot be ignored. Especially on expressways and first-class highways, vehicles are traveling faster, and when vehicles are driving at night, the visual distance is shorter, which will greatly reduce the safety of driving. Therefore, in order to achieve the purpose of safe driving, the front of the highway Line instructions are very important. The continuous setting of delineation marks is one of the effective means. The delineation marks can enable the driver to know the road conditions ahead in advance by reflecting the car lights. The delineation marks set up on both sides of the road can also serve as warning signs for the boundaries of the roadway. The function of inducing and warning drivers at night well ensures the driving safety of passing vehicles.