Botts dots, or “raised pavement markers,” are small bumps lining the centerline or edgeline of a roadway. They are often used on curves where vehicles have a tendency to deviate outside of the proper lane, risking collision. Raised reflectors improve the nighttime visibility of the roadway edges.
Advantages
- Inexpensive.
- Does not physically slow emergency vehicles or buses.
- Can help keep drivers in the appropriate travel lane on curves and under low-visibility conditions.
Disadvantages
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Noise caused by Botts Dots.
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Requires regular maintenance.
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Has not been shown to significantly reduce travel speeds.
