This standard specifies requirements and tests (see Note) for rigid
and flexible portable signs, barriers, self supporting portable signs, “Stop/Go” signs, school crossing patrol signs, flat traffic delineators, flap signs, pedestrian crossing and refuge beacons, internally illuminated posts, twin amber flashing light units, non-retroreflecting road studs and retroreflective self-righting bollards. Active road studs (incorporating light emitting devices) are not covered in this standard.