Applications:
Determination of the Coefficient of Retroreflection RA and R' / Automatic colour indication of retroreflective materials / Field and laboratory use / Quality assessment
Standards
Retroreflection, also called night visibility, is a specific type of light reflection when the light rays goes on a surface and comes back to the source of light. This principle is a pillar in road safety. Indeed, the...
Retroreflection, also called night visibility, is a specific type of light reflection when the light rays goes on a surface and comes back to the source of light. This principle is a pillar in road safety. Indeed, the vehicles lamps during the night enable to see the road markings, road signs and conspicuity tapes. A retroreflectometer is used to measure the retroreflection performance of the surface. The retroreflection (often written “R”) is measured in cd. m-2. lx-1.
The standards for road traffic signs, high visibility clothing, reflective tapes and sheets in the following table.
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ASTM E1709
ASTM E2540
High visibility clothing
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