Botts' dots
Videos
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
Cat's eye (road)
Videos
A cat's eye, or road stud, is a retroreflective safety device used in road marking and was the first of a range of raised pavement markers. The cat's eye, when illuminated by the lights of an approach
Botts' dots
…alongside reflective cat’s-eyes. A typical pattern alternates one cat’s-eye with three Botts' dots within each ten-metre section of the centreline. Cat's eye (road) Raised pavement marker…
Original form cat's eye, UK
Cat's eye glass body and principle of operation. Back (left) face is mirror-coated.
The double-ended cat's eye is Shaw's original design and marks the road centre-line.
The different colours of cats eyes, at Picket Post on the A31