WK3833 Test Method for determination of the coefficient of retroreflection of pavement markings using a 30 meter geometry mobile retroreflectometer.
WK19806 New Test Method for Measuring the Coefficient of Retroreflected Luminance of Pavement Markings in a Standard Condition of Continuous Wetting (RL-Rain)
WK35613 New Practice for Measurement of Retroreflective Signs Using a Mobile Retroreflectometer