logo

ENG  |  KOR

logo

Specification

Support > Specification > ASTM D4956
ASTM D4956
ASTM D4956,
Standard Specification for Retroreflective Sheeting for Traffic Control
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. This specification does not address inks, overlays, or other imaging methods that may be applied to retroreflective sheeting material to create traffic signs or other devices.

Although this specification provides photometric requirements for retroreflective sheeting under evaluation, minimum performance requirements of in-service signs or other devices are outside the scope of this document.

The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Retroreflective sheeting shall be classified as follows.