3M® DIAMOND GRADETM CONSPICUITY MARKING TAPE:
This extremely reflective adhesive tape is for trucks, trailers, and school buses and has an acrylic and polycarbonate construction designed to stand up to the rigors of the road and improve the visibility of trucks and trailers to approaching drivers.
3M® conspicuity markings are six times brighter than conventional markings, reflect at angles approaching 90 degrees, and are highly durable and non-corroding.
Federal regulations require semi-trailers exceeding 10,000 lbs. GVWR to have alternating red and white DOT-C2 approved 2-in wide conspicuity tape applied along at least 50% of their lengths and entirely across their back ends.
Specifications for 3M 983-326 [for Truck and Trailers] and at: Specifications for 3M 983-71 [for School Buses]).