Reflective Raised Pavement Markers
In the United States, Canada, as well as Australia, these plastic devices commonly have two angled edges facing drivers and containing one or more corner reflector strips. In areas where snowplowing is frequent, conventional markers are placed in a shallow groove cut in the pavement, or specially designed markers are used which include a protective metal casting that is embedded in recesses in the pavement, allowing the marker to protrude slightly above the pavement surface for increased visibility, much like a cat's eye. In areas with little snowfall, reflective raised pavement markers are applied directly to the road surface rather than being embedded into the surface.
The device's reflective surface enables the device to be clearly visible at long distances at night and in rainy weather. The devices come in multiple colors which vary in usage depending on local traffic marking standards.
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—Minnie Maddern Fiske (1865–1932)
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—Russell Baker (20th century)
“I have often walked down this street before, but the pavement always stayed beneath my feet before.”
—Alan Jay Lerner (1918–1986)