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Typical left-hand motorway road layout in Ireland and South Africa Divided median strip on a boulevard in Huizhou, China. A median strip, central reservation, roadway median, or traffic median is the reserved area that separates opposing lanes of traffic on divided roadways such as divided highways, dual carriageways, freeways, and motorways.
The reserved area may simply be paved or grass, but can be adapted to other functions, such as decorative landscaping, trees, a median barrier, or railway or streetcar lines. Merge The process of reducing the number of lanes available to traffic, commonly from two lanes to one. Merge nose. See gore. Signage and diagram of a Michigan left ...
A passing lane (North American English), overtaking lane (English outside North America) is a lane on a multi-lane highway or motorway closest to the median of the road (the central reservation) used for passing vehicles in other lanes. (North American usage also calls the higher-speed lane nearest the median the "inside lane" but in the United ...
A road verge is a strip of groundcover consisting of grass or garden plants, and sometimes also shrubs and trees, located between a roadway and a sidewalk. [1] Verges are known by dozens of other names such as grass strip , nature strip , curb strip , or park strip , the usage of which is often quite regional.
The difference is that typically a frontage road will follow along the side of a highway, whereas a frontage lane is a short connection between two different roads. Frontage lanes, closely related to a frontage road, are common in metropolitan areas and in small rural towns.
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The cross slope of both the left and right shoulders should be between 2% and 6%, but not less than the main lanes. Median width: The median should have a width of least 50 feet (15 m), and preferably 60 feet (18 m), in rural areas, and 10 feet (3.0 m), plus a barrier, in urban or mountainous areas.
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