Archives for August 2012

How Pavement Markings are Measured

Coefficient of Retroreflected Luminance (RL ) is the most commonly used measurement of retroreflectance in highway marking. RL is the ratio of the luminance (L) of a surface to the normal illuminance (E) on the surface. In the laboratory this definition works well with testing procedures. This excerpt is taken from the RoadVista Guide to […]