Traffic prohibition signs are circular signs, including prohibition signs and speed limit signs. The specifications are 60CM, 80CM, 100CM and 120CM in diameter. According to the highway speed in China, diameters of 60CM and 80CM are widely used. The diameter of 60CM is suitable for use in residential areas, factories, rural roads and other places; 80CM diameter is suitable for roads and ramps connecting national highways, municipal roads and expressways. 100CM and 120CM are suitable for cantilever signboards of main roads and municipal roads.

Road traffic safety signs, road signs, traffic signs, traffic signs, road signs, place name signs, triangle warning signs and circular traffic signs play an obvious warning role with their bright colors during the day, and their bright reflective effect can effectively enhance people's recognition ability, and they can see the target clearly under the illumination of night lights.

Road traffic safety signs, road signs, traffic signs, traffic signs and road instructions arouse people's vigilance and provide great help to vehicles driving in the dark, thus avoiding accidents and reducing casualties and economic losses. Common specifications of signs, place name signs, triangle warning signs and circular traffic signs: triangle side length is 70cm, 90cm, 1 10cm, and circular diameter is 60cm, 80cm, 100cm.