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Solar road stud. Solar road studs are flashing solar cell powered LED low-maintenance lighting devices that delineate road edges and centrelines. Embedded in the road surface, they are an electronic improvement on the traditional cat's eyes [1] and raised pavement marker in that they may give drivers a larger reaction window.
The paint and tape markers can cause the road surface to crack, and in more severe cases, the markers contribute to road surface raveling [22] (a process in which the aggregate particles are dislodged from the road surface, causing the surface texture to become deeply pitted and very rough [23]) or potholes.
The orange markers separate opposing traffic lanes. The blue marker denotes a fire hydrant on the left sidewalk. 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.
Traffic cones, also called pylons, witches' hats, [1] [2] road cones, highway cones, safety cones, caution cones, channelizing devices, [3] construction cones, roadworks cones, or just cones, are usually cone-shaped markers that are placed on roads or footpaths to temporarily redirect traffic in a safe manner.
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Double-ended cat's eye is Shaw's original design and marks road centre-line. The inventor of cat's eyes was Percy Shaw of Boothtown, Halifax, West Yorkshire, England.When the tram-lines were removed in the nearby suburb of Ambler Thorn, he realised that he had been using the polished steel rails to navigate at night. [3]
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