Rubber speed bumps, usually appearing in unit squares, residential areas, etc., are about 5 cm from the ground. They are usually fixed on the ground with casing expansion screws. T...

With the development of society, transportation is becoming more and more convenient, and the use of rubber speed bumps is becoming more and more widespread. The use of speed bumps...

The function of the convex mirror is as follows:1. The purpose of the convex mirror on the rearview mirror of the car is to increase the field of view, present more objects, and he...

When crossing zebra crossings on many roads, there are more red and white warning posts on the side of the road, especially on roads with central green isolation and machine-non-gr...

As an efficient road safety traffic facility, speed bumps are now indispensable, but with the changes of the times, speed bumps no longer focus only on safety, but on comfort. Conv...

1. What is a road traffic sign?Road traffic signs are facilities that use graphic symbols, colors and words to convey specific information to traffic participants and are used to m...