Accuracy compared with Hand-Held Retroreflectometers:

“The measuring results confirm that the measuring system RetroTek-D provides, within the scope of an acceptable measuring accuracy, the same measured values of the coefficient of retroreflected luminance RL as a portable, handheld measuring device. The accuracy of the measuring results is not influenced by the colour (white or yellow) of road markings nor by the brightness of the environment.”

Repeatability at various speeds:

“The coefficient of retroreflected luminance RL can be detected with a good measuring accuracy by the measuring system RetroTek-D, independent of the measuring velocity.”

Test Conclusion:

“RetroTek-D Mobile Pavement Retroreflectometer is hereby deemed to be well suitable for the dynamic measurement of the coefficient of retroreflected luminance RL of road markings according to the measuring geometry and measuring conditions given in the US-Standard ASTM E 1710 resp. in the European Standard EN 1436 and delivers the same results as a portable retroreflectometer. The measuring results are not influenced by the kind, form and colour (white or yellow) of the road markings and are independent of the measuring speed and the brightness of the environment.”