What are the retroreflection standards for road traffic signs, high visibility clothing, reflective tapes and sheets?
The standards for road traffic signs, high visibility clothing, reflective tapes and sheets in the following table.
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| Object | Standards | Illumination angle (Beta1, Beta2) | Observation angle (α) |
|---|---|---|---|
| Road traffic signs | EN 12899-1 | Beta1 (=5° or 30°or 40°) and Beta2 =0° | α = 0.2° or 0.33° or 2° |
| Road traffic signs |
ASTM E1709 ASTM E2540 |
Beta1 (=-4° or 30°or 40°) and Beta2 =0° | α = 0.2° or 0.5° |
|
High visibility clothing |
EN ISO 20471 | Beta1 (=5° or 20° or 30° or 40°) and Beta2 =0°. | α = 0.2° or 0.33°or 1° or 1.5° |
| Reflective sheets | DIN 67520 | Beta1 (=5° or 20° or 30° or 40°) and Beta2 =0° | α = 0.2° or 0.33°or 1° or 1.5° or 2° |
| Reflective tapes | ECE 104 | Beta1 = 0° and Beta2 (=5° or 30° or 40° or 60°) | α = 0.33° |