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Map of M4 Motorway Junctions

Map of the M4 motorway junctions.

map of main M4 junctions

West M4

To the West the M4 joins the M5 at M4 Junction 20 which heads north to Devon Cornwall and the South West of England.

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. 

 East M4

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.

How Do I Find M4 Traffic News?

Simply type the search words in the search facility towards the top right of this page and click "search".

Latest M4 Traffic News Updates

M4 eastbound at the Reading services slip road between J12 and J11 | Eastbound | Roadworks
Wed, 28 Jan 2015 22:39:12 GMT
M4 Roadworks
The M4 eastbound exit slip to Reading Services is closed , due to roadworks. Road expected to re-open from 5:30 am on 29 January 2015.
M4 westbound between J12 and J13 | Westbound | Roadworks
Wed, 28 Jan 2015 21:47:04 GMT
M4 Roadworks
The M4 westbound is closed between junctions J12 and J13, due to roadworks. Road expected to re-open from 6:00 am on 29 January 2015.
M4 at junction 13 with the A34 | Westbound | Roadworks
Wed, 28 Jan 2015 08:09:16 GMT
M4 Roadworks
On the M4 westbound at junction J13, there are currently delays of 10 mins due to roadworks . Expect disruption until 6:00 am on 2 August 2015.
M4 westbound between J16 and J17 | Westbound | Roadworks
Fri, 23 Jan 2015 18:11:47 GMT
M4 Roadworks
On the M4 westbound between junctions J16 and J17, there are currently delays of 10 mins due to roadworks . Expect disruption until 9:00 pm on 14 March 2015.
M4 westbound between J17 and J18 | Westbound | Roadworks
Tue, 20 Jan 2015 14:27:11 GMT
M4 Roadworks
On the M4 westbound between junctions J17 and J18, there are currently delays of 10 mins due to roadworks . Expect disruption until 6:00 am on 17 April 2015.

Latest M4 Traffic News Updates

Latest M4 News

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