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Raised pavement marker - Wikipedia, the free encyclopedia |
 | | A raised pavement marker, also known as a Botts' dot, delineator, Stimsonite Markers, or simply a reflector, is a safety device used in road construction in the United States, Australia as well as other countries. |
 | | In the U.S. state of California, similar objects called Botts' dots are used to mark lanes on state highways and many arterial roads. |
 | | The current trend is to use concrete, but since white Botts dots are hard to see on white concrete through sun glare, Caltrans has often been forced by public demand to paint lane stripes on freeways that run east-west (and thus face the sunrise or sunset). |
| en.wikipedia.org /wiki/Raised_pavement_marker (1390 words) |
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