Raised pavement marker – Wikipedia
A raised pavement marker is a safety device used on roads.These devices are usually made with plastic, ceramic, thermoplastic paint, glass or occasionally metal, and come in a variety of shapes and colors. Raised reflective markers, such as plastic, ceramic, or metal ones, include a lens or sheeting that enhances their visibility by retroreflecting automotive headlights, while glass road studs
Traffic Signs | Pavement Markers | Road Signs
Some other n...