D4061-13(2018) Standard Test Method for Retroreflectance of Horizontal Coatings
E808-01(2016) Standard Practice for Describing Retroreflection
E809-21 Standard Practice for Measuring Photometric Characteristics of Retroreflectors
E3165-18 Standard Test Method for Nighttime Retroreflected Chromaticity of Retroreflective Sheeting