Road traffic sign is passed by graphic symbols, colors and text to traffic participants traffic management facility-specific information, and its main function: reflect the effectiveness of road safety laws; clear traffic norms; regulating road traffic and increase capacity; reduce incidence of traffic accidents to ensure safe and smooth traffic. With people, vehicles, roads and economic level of the simultaneous development of informative traffic signs have been closely related to people's life, it kept the traffic participants, essential information and security tools.
The most primitive road traffic sign, usually using pigments, paints, wood, iron sheet, can only be a good sight of the simple state of close identification.
