Abstract: A shield device or assembly for a bridge-mounted highway sign has upper and side panels forming a frame surrounding and projecting outwardly from the upper and side edges of the sign, so as to shield the front face of the sign from view from the bridge. The panels are secured to the sign by upper and side mounting devices, which may be arranged so that the panels flare outwardly at angles greater than 90.degree. to the front face of the sign. Corner pieces fill in the corners between the panels at the upper corners of the sign.

Abstract: A guard device is designed to be fitted around a signpost to provide a barrier against persons attempting to climb the signpost. A pair of mating guard members each have a mating edge for engagement with the mating edge of the other guard member, and the mating edges each have a central recess forming an opening with the other recess for fitting around a signpost. Fastener devices such as bolts secure the guard members together with the opening in gripping engagement with the signpost. The guard members when secured together form a continuous barrier surface projecting outwardly from the signpost.