Road Studs : WJ UK - Road Marking Specialists temporary road markings, permanent road markings, road markings, driver training, lgv driver training, hgv driver training, stoke-on-trent, staffordshire, cheshire, shropshire, The 3M 290 Road stud is a high performance, permanent, surface mounted, reflecting roadstud. 3M has combined innovative technologies, including advanced optical design, hard ceramer coatings and computer-aided construction design, to produce a highly reflective, long lasting road stud.