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 access | Westbound | Congestion
Wed, 18 Mar 2026 09:10:28 GMT
M4 Current Traffic Incidents
Location : The M4 westbound entry slip at junction J19 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 09:15 and 09:30 on 18 March 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound between J15 and J16 | Westbound | Road Works
Wed, 18 Mar 2026 09:11:00 GMT
M4 Roadworks
Location : The M4 westbound between junctions J15 and J16 . Reason : Roadworks are planned. Status : Pending. Schedule : Expect disruption everyday between 09:00 and 16:00 from 25 March 2026 to 26 March 2026. Schedule : Expect disruption everyday between 09:00 and 16:00 from 30 March 2026 to 1 April 2026.

M4 J5 westbound exit | Westbound | Congestion
Wed, 18 Mar 2026 08:06:25 GMT
M4 Current Traffic Incidents
Location : The M4 westbound exit slip at junction J5 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 08:00 and 08:15 on 18 March 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 J11 eastbound exit | Eastbound | Congestion
Wed, 18 Mar 2026 08:37:04 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 08:30 and 08:45 on 18 March 2026. Delay : There are currently delays of 10 minutes against expected traffic.

M4 westbound between J19 and J20 | Westbound | Broken down vehicle
Wed, 18 Mar 2026 08:44:56 GMT
M4 Current Traffic Incidents
Location : The M4 westbound between junctions J19 and J20 . Lane Closures : The hard shoulder is closed. Reason : Broken down vehicle. Status : Currently Active. Time To Clear : The event is expected to clear between 09:15 and 09:30 on 18 March 2026. Return To Normal : Normal traffic conditions are expected between 09:15 and 09:30 on 18 March 2026.

Map of M4 Motorway Junctions

West M4

East M4

How Do I Find M4 Traffic News?

Latest M4 News