1, Traffic signs should reflect the characteristics of highway and surrounding road network, so that the driver accurately determine their position, find the right destination, and the network traffic in the rational distribution;
2, Traffic signs should be able to enhance the driver's awareness of safe driving;
3, Traffic signs should be easy to identify, easy to understand;
4. The setting of traffic signs should be systematic, continuous, balanced and avoid information overload;
5. The setting of dynamic traffic signs should not hinder the use of static traffic signs.
6, Collect the road road, traffic, meteorology, environment and the surrounding road network and other basic information;
7, To determine the implementation of road traffic signs standards, scale;
8, From the security, environmental protection, technology, economic, aesthetic and other aspects of the program comparison, choose the best solution.