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M4 motorway (Great Britain)

M4 shield

M4
Route information
Part of Tabliczka E30.svg E30
Maintained by Highways England and the South Wales Trunk Road Agency
Length: 189 mi (304 km)
Existed: 1961 – present
History: Constructed 1961–96
Major junctions
From: Chiswick
51°29′23″N 0°16′41″W / 51.4897°N 0.2781°W / 51.4897; -0.2781 (M4 motorway (eastern end))
  Junction 4b.svg UK-Motorway-M25.svg
M25 motorway
Junction 8-9.svg UK-Motorway-A308 (M).svg
A308(M) motorway
Junction 8-9.svg UK-Motorway-A404 (M).svg
A404(M) motorway
Junction 10.svg UK-Motorway-A329 (M).svg
A329(M) motorway
Junction 19.svg UK-Motorway-M32.svg
M32 motorway
Junction 20.svg UK-Motorway-M5.svg
M5 motorway
Junction 21.svg UK-Motorway-M48.svg
M48 motorway
Junction 22.svg UK-Motorway-M49.svg
M49 motorway
Junction 23.svg UK-Motorway-M48.svg
M48 motorway
Junction 29.svg UK-Motorway-A48 (M).svg
A48(M) motorway
To: Pont Abraham services
51°44′42″N 4°03′54″W / 51.7451°N 4.0651°W / 51.7451; -4.0651 (M4 motorway (western end))
Location
Primary
destinations
:
London
Heathrow 20 airtransportation.svg
Slough
Maidenhead
Bracknell
Reading
Newbury
Swindon
Chippenham
Bristol
Newport
Cardiff
Bridgend
Port Talbot
Neath
Swansea
Llanelli
Road network

M4 shield

The M4 is a motorway which runs between London and South Wales in the United Kingdom. Major towns and cities along the route include Slough, Reading, Swindon, Bristol, Newport, Cardiff and Swansea. Originally referred to as the London-South Wales Motorway, the English section, including a suspension bridge over the River Severn, was constructed between 1965 and 1971; the Welsh element was completed in 1993. A new Severn bridge, known as the Second Severn Crossing, was opened in 1996 with the M4 rerouted to use it.

The M4 runs close to the A4 from London to Bristol. After crossing the River Severn it follows the A48 through South Wales, using the Brynglas Tunnels at Junction 25a, Newport and terminates just north of Pontarddulais. It is one of only three motorways in Wales; the other two, the A48(M) and M48, branch off it. The area of land along the M4, with its towns and cities, is known as the M4 corridor. European route E30 includes most of the M4, although it is not signed as such.


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Wikipedia

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