Botts' dots
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Botts' dots are round non-reflective plastic and ceramic raised pavement markers. In many parts of the US, Botts' dots are used, along with reflective raised pavement markers, to mark lanes on highway
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 replace the painted median stripes. Reflective Stimsonite (darker orange) markers are spaced at regular intervals for increased visibility at night.
Valencia, California
Musical road
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A musical road is a road, or section of a road, which when driven over causes a tactile vibration and audible rumbling that can be felt through the wheels and body of the vehicle. This rumbling is hea
Musical Road in California
Sign next to the Tijeras Musical Road
Melody Road in Shibetsu, Hokkaido, Japan, which is polyphonic