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 westbound within J19 | Westbound | Congestion
Wed, 22 Apr 2026 19:44:28 GMT
M4 Current Traffic Incidents
Location : The M4 westbound at junction J19 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 20:45 and 21:00 on 22 April 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 eastbound within J20 | Eastbound | Road Works
Wed, 22 Apr 2026 19:36:18 GMT
M4 Roadworks
Location : The M4 eastbound at junction J20 . Reason : Roadworks. Status : Currently Active. Period : from 20:35 on 22 April 2026 to 06:00 on 23 April 2026. Lanes Closed : All lanes are closed.

M4 J19 westbound exit | Westbound | Congestion
Wed, 22 Apr 2026 17:16:32 GMT
M4 Current Traffic Incidents
Location : The M4 westbound exit slip at junction J19 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:15 and 18:30 on 22 April 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 J13 eastbound exit | Eastbound | Congestion
Wed, 22 Apr 2026 17:38:34 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound exit slip at junction J13 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:30 and 18:45 on 22 April 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound between J8 and J10 | Westbound | Road Works
Wed, 22 Apr 2026 19:21:12 GMT
M4 Roadworks
Location : The M4 westbound between junctions J8 and J10 . Lane Closures : Lanes 1 and 2 will be closed. Reason : Roadworks are planned. Status : Pending. Schedule : From 20:00 on 29 April 2026 to 06:00 on 30 April 2026. Lanes Closed : There will be two of four lanes closed.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News