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A48(M) motorway

Route map:
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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]

Junctions

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A48(M) motorway
North-Eastbound exits Junction South-Westbound exits
M4
London
J29 M4 (Castleton) Start of motorway
Entering the City and County Borough of Newport Entering the City and County of Cardiff
Start of motorway
Newport
J29A (St Mellons) A48 Cardiff

Previous A48(M) motorways

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The 6-mile (9.7 km) Port Talbot bypass which opened in 1966,[1] was numbered A48(M) before its incorporation into the westward extension of the M4 in the 1970s.[citation needed] 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.[citation needed]

References

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