Fluorescent orange microprismatic reflective sheeting with pressure sensitive adhesive for production of high quality work zone signs. Highly visible in daytime, twilight, inclement weather and at night. 3M Diamond Grade fluorescent work zone sheeting series 3924S is highly visible at wide angles to approaching traffic and at long sight distances. Fluorescent orange is approved in the U.S. manual on uniform traffic control devices for all construction/maintenance work zone signs and devices. 3924S sheeting has a distinctive seal pattern that is easily distinguished to assist work site inspection. May be applied to aluminum, medium and high density plywood and reinforced plastic (FRP) substrates.