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Rolled-in rumble strip marking the shoulder of a rural US road Milled-in rumble strip on the centerline of a rural US road. There are several different ways to install rumble strips: Rolled-in, applied to newly laid asphalt pavement while it is still warm and moldable. Milled-in, applied to existing hardened asphalt or concrete roads. [6]
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Road traffic control devices are markers, signs and signal devices used to inform, guide and control traffic, including pedestrians, motor vehicle drivers and bicyclists. These devices are usually placed adjacent, over or along the highways , roads, traffic facilities and other public areas that require traffic control .
Speed cushions, a raised portion of road with a flat top only extending over part of the carriageway's width, are used singly, in a pinch point, or in pairs or triples. Rumble strips, uneven road surfaces, are now only used in rural areas and retail parks because of the noise.
Rumble strips are commonly used for the same purpose. 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.
In New Zealand, they are compliant in two sizes for use on all roads; these are: 35 in (900mm), up to 16.5 lb (7 kg) - for all activities on all roads. (with two reflective stripes) 17.7 in (450mm), up to 16.5 lb (7 kg) - for the protection of wet road markings only (with one reflective stripe)
The $903,000 from the state Department of Transportation will cover design and construction work.
Most state-owned roads and many arterial roads in the state use Botts' dots as the delineation between lanes. They are also used for the dashed marking in passing areas. More recently, Botts' dots have been used in the snow-free areas of Alabama , Florida , Louisiana , Mississippi , Nevada , Georgia , Washington , and Texas .
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