Abstract: Reflective pavement markers held fixedly to a roadway by epoxy or adhesive include reflectors and a body with spaced top and bottom mounting faces, transverse forward and rearward faces, and lateral side faces. A recess formed in the forward and rearward faces of the body may receive and vertically mount a reflector therewithin. The reflectors have vertical outer faces that are orthogonal to the body mounting faces and angled 30°±15° relative to an orthogonal line from a lateral side face such that the marker generally has a parallelepiped shape. An array of openings, which may be closed or open, extend inwardly into the body from the top and bottom faces and have constricted openings to positively lock in the fixing adhesive and prevent the marker from easily lifting from the pavement.

Abstract: Disclosed are improved snowplowable pavement markers held fixedly to a roadway by adhesive. The markers include a holder and at least one transversely arranged reflector to retroreflect incident light from headlights of approaching vehicles. The holders have a pocket for supporting the reflector. One or more through openings having angled sides are defined in the bottom of the pocket so that when the marker is installed in an adhesive bed on the pavement, adhesive flows into contact with the holder and the bottom of the reflector to simultaneously affix both to the pavement. Reflectors may be replaced by simply chiseling an old reflector out of the holder pocket to create a flat bottom surface in the pocket to which a bead of mastic adhesive is applied and a new reflector is subsequently installed. This new marker construction applies to both raised and recessed snowplowable pavement markers.

Abstract: A recessed snowplowable reflective pavement marker is mounted in a shallow elongated groove in a highway surface to expose the marker to headlights of oncoming motor vehicles. The marker has a plastic housing with a pocket for holding the reflector and two sidewalls that support positioning tabs to overlie the uncut pavement. These tabs maintain markers at a fixed depth below the pavement. Two other upstanding sidewalls extend laterally in the groove and terminate at the lower edge of the reflective area of the reflector. These sidewalls prevent adhesive from entering the reflector pocket. The function of the positioning tabs and lateral sidewalls plus the requirement that headlights need only illuminate this reflective area and not the reflector's non reflective base serve to reduce groove depth by 50% less than prior art. This lightweight plastic housing and shallower groove reduce installation costs and enhance marker safety and performance.

Abstract: A very low-profile snowplowable pavement marker mounted in an elongated groove formed in a highway pavement, the groove extending longitudinally of the highway and exposing the reflective highway marker to the headlights of oncoming motor vehicles when their approach distance from the reflective highway marker is adequate for highway guidance purposes. The reflective highway marker is a metal casting with a reflector mounted in a pocket formed in the casting. The casting is adhesively installed in a deepened section of the groove. The protective rails of the casting are situated slightly above the pavement surface, but are significantly lower than rails of prior art snowplowable castings. The leading edge of the reflector support is below pavement level and allows light from oncoming headlights to enter the reflector without the shadowing effect prevalent in conventional low-profile marker castings.