ASTM International Standard Specification for Nighttime Photometric Performance of Retroreflective Pedestrian Markings for Visibility Enhancement (Withdrawn 2013) ASTM E1501-99(2004)

This specification deals with the photometric performance of retroreflective markings to be used on objects worn by pedestrians for the purpose of enhanced nighttime conspicuity. It addresses visibility from viewpoints around the entire object, and it allows for freedom of design of the markings so long as the minimum requirements are achieved. This specification does not address potentially diminished performance of retroreflective markings that may be experienced with general storage, use, wear, and care. To facilitate standard testing, objects are classified into the following types: Type 1-sleeved garments such as coats, jackets, and shirts; Type 2-sleeveless garments such as vests; Type 3-leg coverings such as trousers (short or long), leg bands, leggings, and socks (worn with short trousers); Type 4-back-carried bags such as backpacks, and school bags; Type 5-head gears such as hats, helmets, and head bands; and Type 6-shoes and other footwear. The parameters that shall be taken into consideration are the retroreflective return, coefficient of luminous intensity, and chromaticity coordinates. An adjustment for the brightness/luminance ratio as a function of color is also made.