Today’s M4 Travel Disruptions
- No Reported Congestion
Today’s M4 Accident Updates
- No Reported Accidents
Westbound M4 Closures and Roadworks Delays
Eastbound M4 Closures and Roadworks.
Traffic Incidents M4 Wales.
Information supplied direct by Traffic Wales.
- M4 : Westbound : J42 Earlswood : Onslip closed : Retaining wall works : Diversions in place : 03/10/25-06/10/25 2000-0600 :Description: M4 : Westbound : J42 Earlswood : Onslip closed : Retaining wall works : Diversions in place : 03/10/25-06/10/25 2000-0600 :, Start time: 03/10/2025 20:00 , End Date: 06/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 15:42
Travel delays Wales. - M4 : Westbound : J39 Groes : Onslip closed : Roadworks : Diversions in place : 03/10/25-06/10/25 2000-0600 :Description: M4 : Westbound : J39 Groes : Onslip closed : Roadworks : Diversions in place : 03/10/25-06/10/25 2000-0600 :, Start time: 03/10/2025 20:00 , End Date: 06/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 15:39Travel delays Wales.
- M4 : Westbound : J37 Pyle to J39 Groes : Road closed : Roadworks : Diversions in place : 03/10/25-06/10/25 2200-0600 :Description: M4 : Westbound : J37 Pyle to J39 Groes : Road closed : Roadworks : Diversions in place : 03/10/25-06/10/25 2200-0600 :, Start time: 03/10/2025 22:00 , End Date: 06/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 15:32Travel delays Wales.
- M4 : Both directions : J23A Magor : Road closed : Electrical work : Diversions in place : 03/10/25-06/10/25 2000-0600 :Description: M4 : Both directions : J23A Magor : Road closed : Electrical work : Diversions in place : 03/10/25-06/10/25 2000-0600 :, Start time: 03/10/2025 20:00 , End Date: 06/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 15:21Travel delays Wales.
- M4 : Eastbound : J38 Margam to J37 Pyle : Road closed : Roadworks : Diversions in place : 04/10/25-22/11/25 0600 : Contraflow :Description: M4 : Eastbound : J38 Margam to J37 Pyle : Road closed : Roadworks : Diversions in place : 04/10/25-22/11/25 0600 : Contraflow :, Start time: 04/10/2025 6:00 , End Date: 22/11/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 15:35Travel delays Wales.
- M4 : Eastbound : J33 Capel Llanilltern : Onslip closed : Environmental work : Diversions in place : 05/10/25-06/10/25 2000-0600 :Description: M4 : Eastbound : J33 Capel Llanilltern : Onslip closed : Environmental work : Diversions in place : 05/10/25-06/10/25 2000-0600 :, Start time: 05/10/2025 20:00 , End Date: 06/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 26/09/2025 14:11Travel delays Wales.
- M4 : Westbound : J37 Pyle : Onslip closed : Structural inspections : Diversions in place : 29/09/25-04/10/25 2000-0600 :Description: M4 : Westbound : J37 Pyle : Onslip closed : Structural inspections : Diversions in place : 29/09/25-04/10/25 2000-0600 :, Start time: 29/09/2025 20:00 , End Date: 04/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 29/09/2025 20:00Travel delays Wales.
- M4 : Westbound : J24 Coldra to J26 Malpas : Road closed : Roadworks : Diversions in place : 20/09/25-10/10/25 2000-0600 :Description: M4 : Westbound : J24 Coldra to J26 Malpas : Road closed : Roadworks : Diversions in place : 20/09/25-10/10/25 2000-0600 :, Start time: 20/09/2025 20:00 , End Date: 10/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 30/09/2025 20:14Travel delays Wales.
- M4 : Westbound : J33 Capel Llanilltern : Offslip closed : Environmental work : Diversions in place : 01/10/25-03/10/25 2000-0600 :Description: M4 : Westbound : J33 Capel Llanilltern : Offslip closed : Environmental work : Diversions in place : 01/10/25-03/10/25 2000-0600 :, Start time: 01/10/2025 20:00 , End Date: 03/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 01/10/2025 20:00Travel delays Wales.
- M4 : Eastbound : J43 Llandarcy to J42 Earlswood : Road closed : Retaining wall works : Diversions in place : 02/10/25-04/10/25 2000-0600 :Description: M4 : Eastbound : J43 Llandarcy to J42 Earlswood : Road closed : Retaining wall works : Diversions in place : 02/10/25-04/10/25 2000-0600 :, Start time: 02/10/2025 20:00 , End Date: 04/10/2025 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 02/10/2025 20:00Travel delays Wales.
- M48 : Both directions : Severn Bridge : 7.5t weight restriction for heavy goods vehicles from 27/05/25-until further noticeDescription: M48 : Both directions : Severn Bridge : 7.5t weight restriction for heavy goods vehicles from 27/05/25-until further notice, Start time: 27/05/2025 0:00 , Expected end time: 23/05/2026 23:55, Severity: Moderate, Source: Welsh Government, Last updated: 03/06/2025 12:42Travel delays Wales.
M4 Motorway Map
Live traffic flow information. Avoid M4 travel congestion and plan a smarter route.
UK Traffic Delays is a reliable source of updated UK travel information. National Highways data obtained under open licence. London travel information is used under license from TfL: Powered by TfL Open Data.
Our website contains public sector travel information licensed under the: Open Government Licence v3.0.
there are terrible traffic queues at m4 jct 8 , not reported on the camera or this website now 17.08 04/03/25
Please could I have a list of traffic accidents and congestion on the m4 in wales to Bristol prior to 1pm on Sat 19/10/24? I need it for insurance purposes, as I missed a flight. Thank you.
I was travelling back on the M4 on Sunday afternoon, after visiting my daughter’s family.
What I want to know is, why didn’t highways team place diversion signage at jnct 13, i.e. BEFORE arriving at Jnct 12.
The nightmare that I was stuck in lasted 5 hours… to go 8 junctions along the M4.
Being in that kind of traffic where you travel at 3 mph for almost 5 hours is not economical, healthy, sensible nor effective.
Whoever thought it was ok to plan it so everyone fell foul of the traffic backlog should lose their job.
I felt like I had jetlag this morning…
Will M4 be closed at Pontabraham on Sunday 3rd September.Also what other roadworks the same day on M4.
On Saturday 19 March at approx midnight, I will drive from London to Windsor on the M4 hoping to exit at junction 6 for Windsor. Will I be able to do this smoothly or will there be deviations on my way to Windsor from London for M4 works on Saturday the 19th of March? Thanks
Will M4 be open, right through from Wales to Heathrow, Friday night to early sat morning, flight to catch
Hi
Please can you confirm is there a diversion set up just before junction 8/9 of the M4 as I need to get on the M4 to travel to Somerset.
please can you put closures on M4 as I have to give news to my hubby who, at present, is driving a coach between Cardiff to Heathrow, or London Victoria or Bristol Airport. Your website is atrocious at trying to find out what is closed, when its closed and its opening hours. We need it in plain speak please to make professional drivers less tense and able to work out if they have to divert.
IS THE ROUNDABOUT STILL CLOSED AT JUNCTION 13 ON M4
M4 5 miles traffic due to a car crash
Thank you for your live update, really useful to know.