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A dual carriageway or a divided highway is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are designed to higher standards with controlled access are generally classed as motorways , freeways, etc., rather than ...
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 term also applies to divided roadways other than highways, including some major streets in urban or suburban areas.
At the junction with the A559 just outside the village of Lostock Gralam, the road becomes dual carriageway again (it gains a central reservation) and turns south to bypass the town of Northwich. As the road skirts the south of Northwich, there is a roundabout with the A530 (south towards Middlewich ); traffic lights for the Gadbrook Park ...
The proportion of A-road miles that are dual-carriageway across Britain barely changed in a decade, from 17% in 2012 to 18% in 2022. ... £5 billion of “positive benefits” to the UK economy ...
A dual carriageway road (North American English: divided highway) has two roadways separated by a central reservation (North American English: median). A local-express lane system (also called collector-express or collector-distributor) has more than two roadways, typically two sets of 'local lanes' or 'collector lanes' and also two sets of ...
The opposing directions of travel are separated by a central reservation (UK) or median strip (US) generally a few meters to a few dozen meters wide, which may consist of a traffic barrier or a natural barrier like grass. This separation makes controlled-access highways a subset of dual carriageways (UK) or divided highways (US).
For a road to be classed as a dual carriageway, the two directions of traffic flow must be physically separated by a central reservation. [15] Enforcement of UK road speed limits increasingly uses speed guns, automated in-vehicle systems and automated roadside traffic cameras.
Concrete step barrier cross-section Concrete step barrier on M1 motorway (UK) A concrete step barrier is a safety barrier used on the central reservation of motorways and dual carriageways as an alternative to the standard steel crash barrier. [1]