Map of M4 Motorway Junctions

Map of the M4 motorway 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".

M4 eastbound between J4B and J4 | Eastbound | Broken down vehicle
Thu, 20 Feb 2025 01:35:37 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound between junctions J4B and J4 . Lane Closures : Lane four is closed. Reason : Broken down vehicle. Status : Currently Active. Time To Clear : The event is expected to clear between 02:15 and 02:30 on 20 February 2025. Return To Normal : Normal traffic conditions are expected between 02:15 and 02:30 on 20 February 2025. Lanes Closed : There is one of five lanes closed.

M4 J19 westbound exit | Westbound | Accident
Wed, 19 Feb 2025 21:22:38 GMT
M4 Current Traffic Incidents
Location : The M4 westbound exit slip at junction J19 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 22:15 and 22:30 on 19 February 2025. Return To Normal : Normal traffic conditions are expected between 22:15 and 22:30 on 19 February 2025. Lanes Closed : There is one of two lanes closed.

M4 eastbound within J11 | Eastbound | Road Works
Wed, 19 Feb 2025 20:21:22 GMT
M4 Roadworks
Location : The M4 eastbound at junction J11 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 20:00 and 06:00 from 26 February 2025 to 28 February 2025. Lanes Closed : There will be two of three lanes closed.

M4 J11 eastbound access | Eastbound | Road Works
Wed, 19 Feb 2025 20:21:21 GMT
M4 Roadworks
Location : The M4 eastbound entry slip at junction J11 . Lane Closures : Lane one will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 20:00 and 06:00 from 26 February 2025 to 28 February 2025. Lanes Closed : There will be one of two lanes closed.

M4 westbound between J13 and J14 | Westbound | Road Works
Wed, 19 Feb 2025 20:28:18 GMT
M4 Roadworks
Location : The M4 westbound between junctions J13 and J14 . Lane Closures : Lane one will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 26 February 2025 to 06:00 on 27 February 2025. Lanes Closed : There will be one of three lanes closed.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News