A48(M) motorway

The A48(M) motorway in Wales links Cardiff with Newport. It is a 2 miles (3.2 km) long, M4 spur. At St Mellons, it runs continuously into the dual-carriageway A48, which also features (albeit narrow) hard shoulders. The A48(M) has no junctions and opened in 1977.[1] [2] The M4 was extended from junction 29 in 1980.[3]

A48(M) motorway
Eastbound exits Junction Westbound exits
M4
London
J29 M4 (Castleton) Start of motorway
Start of motorway
Newport
J29A (St Mellons) A48 Cardiff

A48(M)
Route information
Maintained by South Wales Trunk Road Agency
Length2.0 mi (3.2 km)
Existed1977–present
Major junctions
East endCastleton, Newport
 
J29 → M4 motorway
West endSt Mellons, Cardiff
Location
Primary
destinations

Cardiff
Road network
Eastbound heading towards M4 junction 29

Previous A48(M) motorways

The 6-mile (9.7 km) Port Talbot bypass which opened in 1966,[2] was numbered A48(M) before its incorporation into the westward extension of the M4 in the 1970s.[4] Some maps show the Morriston bypass section of the M4 as also having been originally numbered A48(M), although whether this number was ever used on the ground has been questioned.[5]

References

KML is from Wikidata
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