Abstract: A self-raising post of a plastic material, such as PVC, for use as a roadside marking post, a traffic sign post, a lamp post, or for other comparable uses in road traffic environments, has a channel-shaped bending zone with substantially arcuate cross-section and with the convex side facing the on-coming traffic. The cross-sectional area of the bending zone increases progressively towards the lower end, whereby the flaring-out zone formed upon bending of the post will be larger below than above the line of bending. The greater inherent resiliency of the material below than above the line of bending will cause the post to bend back into an upright position after having been hit by a vehicle. Certain embodiments of the posts are manufactured by diagonally splitting lengths of extrusion-molded plastic tubing, forming two identically shaped posts from each tube length.

Abstract: A reflective roadside marking post, where the reflector is protected from dirt by a tubular means projecting in front of the reflector. The tubular means is by partition walls divided into a number of axial channels or cells and the reflector is visible through said cells. In order to make the reflector reachable for cleaning purposes it and/or the tubular means is/are moveable in relation to the post.

Abstract: The invention provides an improved reflection device comprising a tubular means enclosing a reflective element and arranged for mounting at desired level over a road surface at some distance from the road border. In the preferred embodiment, the tubular means has two open ends, and the reflective element has reflective material at both sides thereof and is arranged for being detachably inserted through a slot in the envelope wall of the tubular means. For eliminating or decreasing the risk of soiling the reflective element, said element is protected by the tubular means which has portions of substantial length in front of both sides of the reflective element. Preferably, each of said portions have a length of at least equal to half the internal maximum cross section dimension of the tubular means at the location of the reflective element. The reflective element is provided with a grip and is easily insertable and removable into and out from said slot.