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A round, white Botts' dot, surrounded by excess adhesive Botts' dots on Interstate 280, near the Sand Hill Road exit, Menlo Park, California. Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective ceramic [1] raised pavement markers.
A round, white Botts' dot Main article: Botts' dots Nonreflective raised pavement markers (also known as Botts' dots) are usually round, are white or yellow, and are frequently used on highways and interstates in lieu of painted lines.
Botts' dots (low rounded white or yellow dots), named for the California Caltrans engineer Elbert Botts, who invented the epoxy that keeps them glued down, are one type of a mechanical non-reflective raised marker.
Bailey bridge in Libya Büchner funnel and flask A round, white Botts' dot A Codd bottle Crompton's mule Davy lamp Dr. Martens boots An Éolienne Bollée London Eye Ferris wheel. Abney level – William de Wiveleslie Abney; Aldis lamp – Arthur Cyril Webb Aldis [1] Aldrin – Kurt Alder [2] Alexanderson alternator – Ernst Alexanderson
Paint dots at head height mean the tree needs pruning. “Basically, it marks the tree in an inconspicuous way,” says Ken Fisher, assistant forester for the Boulder Parks and Recreation Department.
Elbert Dysart Botts (January 2, 1893 – April 10, 1962) was the California Department of Transportation (Caltrans) engineer credited with overseeing the research that led to the development of Botts' dots and possibly the epoxy used to attach them to the road.
In New Zealand, roads are generally marked with white reflective cat's eyes every 10-metres along the centreline, occasionally on high volume roads; both Botts' dots and cat's eyes are used (typically there is one cat's eye followed by three Botts' dots places in every ten-metre stretch of highway). The colour pattern on New Zealand roads is ...
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