The basic meaning of traffic signs "shaped"

　　◆Are equilateral triangles:For warning signs;
　　◆Round:For prohibition and signage;
　　◆Inverted equilateral triangle:Used to "slow down to let the line" disable flag;
　　◆Octagonal:For "stop to" disable flag;
　　◆Fork:For "railway level crossing fork symbol" warning signs;
　　◆Square:For guiding signs, some warning, prohibition and signage tourism signs, auxiliary signs, notices signs.
　　In addition to individual signs, signs consistent color border color and logo graphics or characters, in addition to signs lining the outer edge of the color logo should be consistent with the logo background.