The three element of the logo is a symbol of the color of the logo, the shape of the mark, and the symbol of the symbol.
The following main categories:
(1) the number and direction of road signs;
(2) intersection direction and location mark;
(3) export forecast and export mark;
(4) location, direction and distance mark;
(5) toll station mark;
(6) service area sign;
(7) information mark;

(8) traffic signs.