Provisions on the geometry of the draft international "colors and safety signs" standard is:
The triangle. Display degree is high, battery powered warning lights irrespective of light conditions traffic barricade light, than the other shape attract sb.'s attention. Our country adopts the triangle for the road traffic signs geometry, using inverted triangle in the "parking way" and "slow.".
The circular. Circular display a higher degree, vision, also easy to arrange text, our country will round for prohibition and indicating two marks of geometry.
The square. Including rectangular and traffic warning light square, its visibility, for the road traffic signs geometry.
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