AASHTO M 268-15 (2019) PDF Download

AASHTO M 268-15 (2019) is a standard specification that describes the requirements for retroreflective sheeting used in traffic control applications. It specifies that the sheeting can be used as a reflectorized background for sign messages or for the application of legends and symbols onto the reflectorized background. The sheeting can be in opaque black or transparent colors.

This standard does not cover temporary retroreflective sheeting used during construction, as there are other specifications for these products. It also states that all material used must have been manufactured within 18 months of the delivery date. Furthermore, it requires that all retroreflective sheeting and process components on a single sign must be supplied by the same manufacturer or approved by that manufacturer.