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A white retroreflective raised pavement marker (Stimsonite design) A blue raised pavement marker (for marking the location of fire hydrants) White markers — for lane markings or to mark the right pavement edge. Yellow or orange markers — These separate traffic moving in opposite directions, or mark the left pavement edge on one-way roadways.
Utility repair tag (also known as A-tag, asphalt tag and road cut medallion) is a plastic color-coded pavement marker embedded in the top surface of an asphalt utility cut restoration to identify the responsible party of that pavement repair or patch. [1] [2] The tag is not to be used for identification of an underground utility location. [3]
The cat's eye, showing the iron base, rubber housing and lenses White raised pavement marker near "pea-structure" side-line on highway surface. Mechanical devices may be raised or recessed into the road surface, and either reflective or non-reflective.
Botts' dots (turtles in Washington and Oregon or buttons in Texas and other southern states) are round non-reflective ceramic [1] raised pavement markers. In many parts of the US, Botts' dots are used, along with reflective raised pavement markers , to mark lanes on highways and arterial roads .
Granular base equivalency or granular base equivalence (GBE) is a measure of total pavement thickness. [1] [2] Since pavement is composed of multiple layers with different physical properties, its total thickness is measured by GBE. GBE translates the thickness of different road layers to a number using a set of coefficients.
The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public ...
Pavement markings may be permanent or removable. Interim markings are temporary markings used in place of a pavement for two weeks or until a real pavement is installed in that specific area. These broken-line markings are at least ten feet (3.0 m) in length. Raised pavement markers are used to supplement or replace pavement markings. They may ...
Closeup of a United States Coast and Geodetic Survey marker. United States Army Corps of Engineers Survey Marker Marker for triangulation station, indicated by triangle in center Reference marker for triangulation station in upper photo A cotton spindle spike in Tel Aviv pavement, used as a marker for public area cadastral surveying.
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