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A typical British dual carriageway with central barrier on the A63 near Hull, England Map by Cassius Ahenobarbus, zoomed in to show the Via Portuensis, with the dual carriageway splitting close to the city of Rome. This is a very early (perhaps the first) example of a dual carriageway.
The Veterans Memorial Parkway in London, Ontario is a modern at-grade limited-access road with intersections. A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, and partial controlled-access highway, is a highway or arterial road for high-speed traffic which has many or most characteristics of a controlled-access highway ...
A carriageway (British English) [1] or roadway (North American English) [2] consists of a width of road on which a vehicle is not restricted by any physical barriers or separation to move laterally. A carriageway generally consists of a number of traffic lanes together with any associated shoulder , but may be a sole lane in width (for example ...
Despite popular opinion that "freeway" means a road with at least two carriageways, single carriageway freeways exist, as is evidenced by the statement that "[South Africa's] roads include 1,400 km (870 mi) of dual carriageway freeway, 440 km (270 mi) of single carriageway freeway and 5,300 km (3,300 mi) of single carriage main road with ...
But five London boroughs are in the same category, such as Islington (5.2%), Sutton (5.8%) and Lambeth (8.9%). The proportion of A-road miles that are dual-carriageway across Britain barely ...
As an initiative to reduce energy consumption, the national speed limits for otherwise unrestricted single-carriageway and dual-carriageway roads were temporarily reduced to 50 and 60 mph (80 and 97 km/h) respectively (motorway speed limits were left unchanged at 70 mph (113 km/h)) from 14 December 1974. [66]
The advisory speed limit applies to any road in Germany outside of towns which is either a dual carriageway or features at least two lanes per direction, regardless of its classification (e.g. Autobahn, Federal Highway, State Road, etc.), unless there is a speed limit posted, although it is less common for non-autobahn roads to be unrestricted.
Through traffic on the inner carriageways can flow without interruption. The local–express lane system is an arrangement of carriageways within a major highway where long distance traffic can use inner express lanes with fewer interchanges compared to local traffic which use outer local lanes that have access to all interchanges.