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 J19 westbound exit | Westbound | Road Works
Fri, 17 Jan 2025 21:11:32 GMT
M4 Roadworks
Location : The M4 westbound exit slip at junction J19 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 21:00 on 24 January 2025 to 06:00 on 25 January 2025. Lanes Closed : All lanes will be closed.

M4 J19 westbound exit | Westbound | Road Works
Fri, 17 Jan 2025 21:11:32 GMT
M4 Roadworks
Location : The M4 westbound exit slip at junction J19 . Reason : Roadworks scheme is planned. Status : Pending. Schedule : From 21:00 on 24 January 2025 to 06:00 on 25 January 2025.

link road from M4 westbound J20 to M5 J15 | Westbound | Road Works
Fri, 17 Jan 2025 20:15:07 GMT
M4 Roadworks
Location : The M4 westbound exit slip at junction J20 . Lane Closures : Lanes 1, 2 and 3 will be closed. Reason : Barrier repairs are planned. Status : Pending. Schedule : From 20:00 on 24 January 2025 to 06:00 on 25 January 2025. Lanes Closed : All lanes will be closed.

M4 J12 eastbound exit | Eastbound | Road Works
Fri, 17 Jan 2025 20:16:03 GMT
M4 Roadworks
Location : The M4 eastbound exit slip at junction J12 . Reason : Roadworks. Status : Currently Active. Period : from 20:15 on 17 January 2025 to 05:00 on 18 January 2025. Lanes Closed : All lanes are closed.

M4 westbound within J19 | Westbound | Road Works
Fri, 17 Jan 2025 21:11:32 GMT
M4 Roadworks
Location : The M4 westbound between junctions J18 and J19 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 21:00 on 24 January 2025 to 06:00 on 25 January 2025. Lanes Closed : There will be two of three lanes closed.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News