Road studs are traffic safety facilities fixed on the road, used independently or in conjunction with markings, to guide vehicles and pedestrians to pass smoothly by transmitting lane information through shape, color and reflected light. Road stud is fixed on the road to play a role in marking the raised sign block. It can be used to mark out the boundary of the opposite lane, the boundary of the same lane, the boundary of the lane, etc. It can also be used to mark out curves, entrance and exit lights, inflow markers, narrow roads, road obstacles and other dangerous roads.