A48(M) motorway

A48(M) shield
A48(M)
Route information
Maintained by South Wales Trunk Road Agent
Length2.0 mi (3.2 km)
Existed1977–present
Major junctions
Northeast endCastleton, Newport
Major intersections
J29 → M4 motorway
Southwest endSt Mellons, Cardiff
Location
CountryUnited Kingdom
CountiesNewport, Cardiff
Primary
destinations

Cardiff
Road network
A38(M) A57(M)
North-Eastbound heading towards M4 junction 29

The A48(M) motorway in Wales links Cardiff with Newport. It is a 2-mile-long (3 km) spur of the M4 motorway. 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] The M4 was extended west from junction 29 in 1980.[2]

  1. ^ "M4 in Wales". The Motorway Archive. Archived from the original on 14 March 2007.
  2. ^ "A48(M)". Roads. Retrieved 31 August 2020.