A prototype delineation system was developed for installation on concrete median barriers. The visibility of the reflective devices was evaluated with respect to the following factors: the effect of weathering on the reflectivity of the reflectors, the effect of weathering and other destructive forces on the durability of the reflectors, and the effects of vertical placement, opposing headlight glare and wet night conditions on the visibility of an installation. Mounting materials and techniques were evaluated to determine the most durable with respect to weathering and other destructive forces. Eight millimetre colour motion pictures were taken of an experimental installation under dry night and wet night conditions. An estimated cost for installing median barrier delineators was calculated separately for curves and tangents. /FHWA/.
Abstract