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Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective ceramic [1] raised pavement markers. In many parts of the US, Botts' dots are used, along with reflective raised pavement markers , to mark lanes on highways and arterial roads .
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.
Botts is a surname of European origin. The name refers to: Baker Botts International law firm named for James Addison Baker and Confederate Colonel Walter Browne Botts; Chantal Botts (b. 1976), South African Olympic badminton player; Elbert Dysart Botts (1893–1962), American highway engineer; Jason Botts (b. 1980), American professional ...
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. They are glued to the road surface with epoxy and as such are not suitable in areas where snow plowing is conducted.
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 ...
In California, Botts' dots were commonly used to mark lanes on most freeways from the mid-1960s to the mid-2010s (when the state began to transition away from them and back to using painted lines to divide lanes). Many California cities also use Botts' dots on some (or all) major arterial roads.
It was one of the first agencies in the United States to paint centerlines on highways statewide; the first to build a freeway west of the Mississippi River; the first to build a four-level stack interchange; the first to develop and deploy non-reflective raised pavement markers, better known as Botts' dots; and one of the first to implement ...
Elbert Dysart Botts (1893–1962), American highway engineer ("Botts' dots") Richard Dysart (1929–2015), American actor Tommy Dysart (1935–2022), Scots-born Australian actor