ASTM RR:E12-1004 PDF Download

The ASTM RR:E12-1004 standard is a method used to assess the retroreflective properties of pavement markings under wet conditions.

The purpose of this standard is to provide a standardized procedure for measuring the coefficient of retroreflected luminance (RL) of pavement markings in order to evaluate their visibility and performance in wet conditions. The standard specifies the equipment, test conditions, and measurement procedure to be used in order to ensure consistency and accuracy in the results.

The standard involves subjecting the pavement markings to a standardized wetness condition using water spray or simulated rain. The retroreflective properties of the markings are then measured using retroreflectometers, which determine the amount of light that is reflected back to the observer. The coefficient of retroreflected luminance (RL) is a measure of the retroreflective performance of the markings and indicates their visibility and effectiveness under wet conditions.

The ASTM RR:E12-1004 standard also includes guidelines for the calibration and maintenance of the equipment used and provides information on data interpretation and reporting. It is important for laboratories performing this test to follow the standard precisely to ensure accurate and consistent results, as well as for comparison and evaluation purposes.