1, traffic signs should reflect the characteristics of the road and the surrounding road network, so the driver accurately determine their location, find the correct destination, and the road network in a reasonable amount of traffic assignment;
2, Arrow Solar Traffic
sign should enhance driver awareness of safe driving;
3, traffic signs should be easily identifiable and easy to understand;
4, traffic signs should be set systems, continuous, balanced and avoid information overload;
5, dynamic traffic signs should not preclude the use of a static set of traffic signs.
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