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 J6 eastbound access | Eastbound | Broken down vehicle
Sat, 20 Jun 2026 19:31:13 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound entry slip at junction J6 . Reason : Broken down vehicle. Status : Currently Active. Lanes Closed : There are lane closures.

M4 westbound within J4 | Westbound | Accident
Sat, 20 Jun 2026 19:03:30 GMT
M4 Current Traffic Incidents
Location : The M4 westbound at junction J4 . 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 22:00 and 22:15 on 20 June 2026. Return To Normal : Normal traffic conditions are expected between 22:15 and 22:30 on 20 June 2026. Lanes Closed : There is one of four lanes closed.

M4 J22 westbound access | Westbound | Congestion
Sat, 20 Jun 2026 16:46:23 GMT
M4 Current Traffic Incidents
Location : The M4 westbound entry slip at junction J22 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 17:45 and 18:00 on 20 June 2026. Cause : Vehicle fire. Delay : There are currently delays of 10 minutes against expected traffic.

M4 J19 westbound exit | Westbound | Broken down vehicle
Sat, 20 Jun 2026 17:41:29 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 : Broken down vehicle. Status : Currently Active. Time To Clear : The event is expected to clear between 19:15 and 19:30 on 20 June 2026. Return To Normal : Normal traffic conditions are expected between 19:15 and 19:30 on 20 June 2026. Lanes Closed : There is one of two lanes closed.

M4 westbound between J3 and J4 | Westbound | Accident
Sat, 20 Jun 2026 18:53:29 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J3 and J4 . Lane Closures : Lane one is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 21:45 and 22:00 on 20 June 2026. Return To Normal : Normal traffic conditions are expected between 21:45 and 22:00 on 20 June 2026. Lanes Closed : There is one of four lanes closed.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News