What are the dense small squares on both sides of the white line on the expressway?

The dense small squares on both sides of the white line on the expressway are deceleration markings, which means to remind drivers to slow down.

Deceleration markings can be divided into transverse deceleration markings and longitudinal deceleration markings, which are usually set at the upper and lower bridge positions and turning positions. Its main function is to form a sense of depression by visually narrowing the lane, so that the driver can automatically slow down at corners and ramps that need to slow down.

The longitudinal deceleration marking of the roadway is a set of diamond-shaped dotted lines parallel to the roadway boundary. At the starting point of the longitudinal deceleration marking of the roadway, a 30-meter gradual change section is set. The diamond-shaped dotted line is widened from narrow to wide, and the width is gradually changed from 10 cm to 30 cm, which is one of the newly added markings in the new national standard Road Traffic Marking (GB5768.2-2009).

Extended data

Relevant regulations on deceleration and concession

When driving to a section with a deceleration yield line, drivers should pay attention to slow down in advance, politely let pedestrians stop or observe the traffic situation on the main road, and only after ensuring the priority of vehicles on the main road can they pass safely.

According to Article 52 of the Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China, when a motor vehicle passes through an intersection without traffic signal control and traffic police command, if it is controlled by traffic signs and markings, the priority party shall be allowed to pass first. If you don't slow down and give way according to the prompt of the deceleration line on this section, you will bear the main responsibility for the accident once you collide with the main road vehicles.

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