. "The optical surface 64 of the retroreflective article 54 and exposed surface 66 of the radio frequency-responsive element 58 are coated with an adhesive 68.The cube corner retroreflector 55 can be formed from a suitable thermoplastic material such as vinyl, polycarbonate, acrylate or other material, or can be formed by curing a material such as urethane, epoxy, polyeste" . . . .