ASTM D 4956 - 09 Standard Specification for Retroreflective Sheeting for Traffic Control

American Society for Testing and Materials (ASTM). Current edition approved Aug. 1, 2009. Published August 2009. Originally approved in 1989. Last previous edition approved in 2007 as D4956 – 07. 11 p. This specification covers flexible, non-exposed glass bead lens and microprismatic, retroreflective sheeting designed for use on traffic control signs, delineators, barricades, and other devices.