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 J11 eastbound exit | Eastbound | Congestion
Thu, 28 May 2026 07:17:23 GMT
M4 Current Traffic Incidents
Location : The M4 eastbound exit slip at junction J11 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 08:15 and 08:30 on 28 May 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 eastbound within J22 | Eastbound | Road Works
Thu, 28 May 2026 06:08:02 GMT
M4 Roadworks
Location : The M4 eastbound between junctions J23 and J22 . Reason : Roadworks scheme is planned. Status : Pending. Schedule : From 21:00 on 1 June 2026 to 06:00 on 6 June 2026.

M4 westbound within J3 | Westbound | Congestion
Wed, 27 May 2026 22:47:18 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J2 and J3 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 23:45 and 00:00 on 28 May 2026. Delay : There are currently delays of 15 minutes against expected traffic.

M4 westbound between J15 and J16 | Westbound | Vehicle Recovery
Wed, 27 May 2026 22:55:40 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J15 and 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 00:30 and 00:45 on 28 May 2026. Lanes Closed : There is one of three lanes closed.

M4 J3 westbound access | Westbound | Congestion
Wed, 27 May 2026 23:50:17 GMT
M4 Current Traffic Incidents
Location : The M4 westbound entry slip at junction J3 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 00:45 and 01:00 on 28 May 2026.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News