Rumble strip
Videos
Rumble strips are a traffic calming feature to alert inattentive drivers of potential danger, by causing a tactile vibration and audible rumbling transmitted through a vehicle's wheels into its interi
The North Luzon Expressway's raised plastic transverse rumble strips approaching Balintawak Toll Barrier, Philippines
Rolled-in rumble strip marking the shoulder of a rural US road
Milled-in rumble strip on the centerline of a rural US road
Series of French transverse rumble strips after a dangerous crossroads
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
Rumble strip
…pressed into fresh concrete. Raised plastic or ceramic units, fastened to asphalt or concrete pavement and often with a reflector built into the edge. Botts' dots are a common installation. Profiled thermoplastic markings are created by fusing thermoplastic to the pavement and create alternating elevation and…
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