What is the white mark on the edge of the tunnel entrance?

Distance confirmation line, optical illusion line, oscillation line, lateral deceleration line and shunt line.

The specific functions of these five white signs are:

1, the main function of the distance confirmation line is to help motor vehicle drivers confirm the direct distance between their vehicle and the vehicle in front, so as to keep a safe distance.

2. There are many specific types of optical illusion markings, but the basic principle is that with the help of special graphic structure and color, drivers passing through this section will have a visual impact, thus playing a corresponding prompt role.

3. The oscillating marking is different from the road marking with almost no thickness near the road surface. They are deliberately shaped to protrude from the ground, and some of them have small squares on them, so that when the vehicle passes by, its body will start to vibrate obviously to remind the driver.

4. The lateral deceleration marking is a plurality of white dashed lines perpendicular to the vehicle driving direction, which are parallel. When you see this marking, you should also pay attention to reducing the speed.

5. Diversion markings can generally be seen at intersections where the width is too large or multiple roads meet, and their main function is to guide the driving direction of vehicles. The shunt marking is very easy to identify, and the boundary line formed by the white lane line is filled with white dotted lines or diagonal lines.