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The M4 is the only motorway in Wales apart from its two spurs: the A48 (M) and the M48. The major towns and cities along the route—a distance of approximately 189 miles (304 km)—include Slough, Reading, Swindon, Bristol, Newport, Cardiff, Bridgend, Port Talbot and Swansea .
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The Western end of the M4 is in South Wales Junctions 23 to 48. Bridgend is on Junctions 25 to 37, M4 Junctions 44 and 45 for Swansea, Junctions 30 to 33 for Cardiff and Junctions 24 to 28 for Newport. At the eastern end of the M4 is London, with Junctions for Slough, Reading, Newbury, Swindon and Bristol on the way to Wales in the West.
The M4 is a motorway that runs from London, all the way to south Wales, stretching across the west of the UK. It opened in 1961, and was completed in 1996. The M4 carries over 130,000 vehicles every day, according to data from Highways England.
A map of all the motorway services on the M4 (Great Britain), with detailed information available from each map link.
Live images from CCTV traffic cameras on the M4 in Wales, updated every five minutes.
A list of all the motorway services on the M4, showing the best services on the M4, including the location and facilities at each of the motorway services.
The M4 is a long motorway in the United Kingdom. It goes from London to South Wales. It also passes Bristol. It was first called the London–South Wales Motorway. Junctions
