A48(M) motorway

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

A48(M) shield
A48(M)
Route information
Maintained by South Wales Trunk Road Agent
Length2.0 mi (3.2 km)
Existed1977–present
Major junctions
East endCastleton, Newport
Major intersections
J29 → M4 motorway
West endSt Mellons, Cardiff
Location
CountryUnited Kingdom
Primary
destinations
Cardiff
Road network
← A38(M)→ A57(M)
Eastbound heading towards M4 junction 29


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

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
  1. "A48(M) Cardiff Spur". Pathetic Motorways.
  2. "M4 in Wales". The Motorway Archive. Archived from the original on 14 March 2007.
  3. "A48(M)". Roads. Retrieved 31 August 2020.
  4. "A48(M) Port Talbot Bypass". Pathetic Motorways.
  5. "A48(M) Morriston Bypass". Pathetic Motorways.
Template:Attached KML/A48(M) motorway
KML is from Wikidata


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