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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

connector at M4 J4/M4 spur (Heathrow) | Eastbound | Congestion
Thu, 23 Feb 2017 11:35:21 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound exit slip at junction J4 . Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 11:30 and 11:45 on 23 February 2017. Reason : Congestion.
M4 eastbound between J10 and J8 | Eastbound | Road Works
Thu, 23 Feb 2017 11:31:25 GMT
M4 Roadworks
Status : Pending. Lane Closures : Lanes 2 and 3 will be closed. Schedule : Expect disruption everyday between 22:00 and 06:00 from 23 February 2017 to 25 February 2017. Location : The M4 eastbound between junctions J10 and J7 . Lanes Closed : There will be two of three lanes closed. Reason : Roadside drains works are planned.
M4 westbound between J18 and J19 | Westbound | Road Works
Thu, 23 Feb 2017 11:32:06 GMT
M4 Roadworks
Location : The M4 westbound between junctions J18 and J19 . Status : Pending. Schedule : From 09:30 on 1 March 2017 to 15:30 on 1 March 2017. Reason : Roadworks are planned.
M4 westbound between J18 and J19 | Westbound | Road Works
Thu, 23 Feb 2017 11:32:03 GMT
M4 Roadworks
Status : Pending. Lane Closures : Lane one will be closed. Schedule : From 20:00 on 1 March 2017 to 06:00 on 2 March 2017. Location : The M4 westbound between junctions J18 and J19 . Lanes Closed : There will be one of three lanes closed. Reason : Roadworks are planned.
M4 westbound between J11 and J12 | Westbound | Road Works
Thu, 23 Feb 2017 11:31:29 GMT
M4 Roadworks
Status : Pending. Lane Closures : Lanes 1, 2 and 3 will be closed. Schedule : Expect disruption everyday between 21:00 and 06:00 from 23 February 2017 to 25 February 2017. Location : The M4 westbound between junctions J11 and J13 . Lanes Closed : All lanes will be closed. Reason : Road repairs are planned.

Latest M4 Traffic News Updates

Latest M4 News

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