Road traffic signs are traffic management facilities that use graphic symbols, colors and text to convey specific information to traffic participants.

Its main functions: reflect the effectiveness of road traffic safety law; Clear traffic code of conduct; Regulating road traffic flow and improving traffic capacity; Reduce the incidence of traffic accidents and ensure traffic safety and smooth flow.

With the synchronous development of population, vehicles, roads and economic level, road traffic signs have been closely related to people's lives, and are indispensable information and safety tools for traffic participants all the time.