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 J13 westbound access | Westbound | Broken down vehicle
Sat, 22 Mar 2025 20:30:24 GMT
M4 Current Traffic Incidents
Location : The M4 westbound entry slip at junction J13 . Lane Closures : Lane one is closed. Reason : Broken down vehicle. Status : Currently Active. Lanes Closed : There is one of two lanes closed.

M4 westbound between J8 and J10 | Westbound | Broken down vehicle
Sat, 22 Mar 2025 17:38:38 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J8 and J10 . 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 18:15 and 18:30 on 22 March 2025. Lanes Closed : There is one of four lanes closed.

M4 eastbound within J16 | Eastbound | Vehicle Recovery
Sat, 22 Mar 2025 15:11:11 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound at junction J16 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Vehicle tyre change. Status : Currently Active. Time To Clear : The event is expected to clear between 15:45 and 16:00 on 22 March 2025. Lanes Closed : There is one of three lanes closed.

M4 eastbound between J3 and J2 | Eastbound | Congestion
Sat, 22 Mar 2025 16:31:25 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound between junctions J3 and J2 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 16:30 and 16:45 on 22 March 2025. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound between J16 and J17 | Westbound | Accident
Sat, 22 Mar 2025 16:52:33 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J16 and J17 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Lanes Closed : There is one of three lanes closed.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News