Retro reflecting road stud for carriageway marking - has stepped sides with specified pitch angle to control reflection

摘要

The road stud has a transparent external envelope, the metallised internal face of which has trihedral prism reflectors, and the hollow part is filled with compression resistant material. The envelope faces (2) exposed to light or impact have a stepped formation, the step or riser joint walls form an angle of at least 30 degrees with the horizontal, while the general slope of the face as defined by a line joining the step edges is less than or equal to 15 degrees. The stud has shallow pitch curved end pieces (1) and a flat top (3).