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The North Luzon Expressway's raised plastic transverse rumble strips approaching Balintawak Toll Barrier, Philippines. Rumble strips (also known as sleeper lines or alert strips) are a traffic calming feature to alert inattentive drivers of potential danger, by causing a tactile fuzzy vibration and audible rumbling transmitted through the wheels into the vehicle interior.
Traffic engineers refer to three "E's" when discussing traffic calming: engineering, (community) education, and (police) enforcement.Because neighborhood traffic management studies have shown that residents often contribute to the perceived speeding problem within their neighborhoods, instructions on traffic calming (for example in Hass-Klau et al., 1992 [4]) stress that the most effective ...
A rumble strip can be a series of simple troughs, typically 1 cm (0.4 in) deep and 10 cm (4 in) wide, that is ground out of the asphalt. Other alternatives, similar to the Botts' dots, use raised strips, painted or glued to the surface. A specific form of raised strips using thermoplastic is called profile thermoplastic markings.
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On many roads, the lines are supplemented by reflective raised pavement markers or rumble strips to provide additional visual and tactile feedback to drivers crossing the lines. On freeways in foggy areas of California , there is an obvious break in the line of the shoulder before every exit.
A rumble strip is a section of grooved pavement. When driven on, a rumble strip makes the vehicle shake and creates tire noise. It is intended to redirect the driver's attention back on the road. Rumble strips are currently the most effective method to reducing crashes caused by distracted drivers.
Aug. 5—Editor's note: This story was edited to clarify that drivers must slow down or move over for any stopped vehicles displaying hazard lights. On Monday, the newest changes to the "Move Over ...
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