Wednesday, November 7, 2018

BOTTS DOTS

What are those little bumps in between the lanes on freeways?

Those are known as raised pavement markers, or "Botts’ Dots."
Botts' dots may also be called turtles (Washington and Oregon) or buttons (Texas and other southern states). In many parts of the US and other countries, Botts' dots are used, along with reflective raised pavement markers, to mark lanes on highways and arterial roads. They provide tactile and auditory feedback to drivers when moving across designated travel lanes, and are analogous to rumble strips.
Botts' dots are named after Elbert Dysart Botts, a California Department of Transportation (Caltrans) engineer credited with overseeing the research that led to the development of the markers.
There are an estimated 20 million Botts” Dots in place today on California freeways and highways.
Botts dots are rarely used in regions with substantial snowfall because snow ploys damage or dislodge them.

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