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 | Congestion
Wed, 16 Apr 2025 17:05:38 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 18:00 and 18:15 on 16 April 2025. Delay : There are currently delays of 10 minutes against expected traffic.

M4 J19 westbound exit | Westbound | Congestion
Wed, 16 Apr 2025 16:18:03 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 17:15 and 17:30 on 16 April 2025. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound between J7 and J8 | Westbound | Road Works
Wed, 16 Apr 2025 13:12:24 GMT
M4 Roadworks
Location : The M4 westbound between junctions J7 and J8 . Lane Closures : Lane one will be closed. Reason : Roadside equipment maintenance is planned. Status : Pending. Schedule : Expect disruption everyday between 20:00 and 06:00 from 23 April 2025 to 25 April 2025. Lanes Closed : There will be one of four lanes closed.

link road from M5 J16 northbound to M4 J20 westbound | Westbound | Congestion
Wed, 16 Apr 2025 15:35:32 GMT
M4 Current Traffic Incidents
Location : The M4 westbound entry slip at junction J20 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 16:30 and 16:45 on 16 April 2025. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound within J20 | Westbound | Congestion
Wed, 16 Apr 2025 16:07:28 GMT
M4 Current Traffic Incidents
Location : The M4 westbound at junction J20 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 17:00 and 17:15 on 16 April 2025. Delay : There are currently delays of 10 minutes against expected traffic.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News