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 : J23 Rogiet : 08/04/26-10/04/26 2000-0600 : Closed :Description: M4 : Westbound : J23 Rogiet : 08/04/26-10/04/26 2000-0600 : Closed :, Start time: 08/04/2026 20:00 , Expected end time: 10/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 02/04/2026 16:51
Travel delays Wales. - M4 : Eastbound : J26 Malpas to J25A Grove Park : 07/04/26-11/04/26 2000-0600 : Maintenance works : Closed :Description: M4 : Eastbound : J26 Malpas to J25A Grove Park : 07/04/26-11/04/26 2000-0600 : Maintenance works : Closed :, Start time: 07/04/2026 20:00 , Expected end time: 11/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 02/04/2026 17:04Travel delays Wales.
- M4 : Eastbound : J36 Sarn : 07/04/26-08/04/26 2000-0600 : Closed :Description: M4 : Eastbound : J36 Sarn : 07/04/26-08/04/26 2000-0600 : Closed :, Start time: 07/04/2026 20:00 , Expected end time: 08/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 7:50Travel delays Wales.
- M4 : Westbound : J38 Margam to J41 Pentyla/Baglan : 07/04/26-09/04/26 2000-0600 : Closed :Description: M4 : Westbound : J38 Margam to J41 Pentyla/Baglan : 07/04/26-09/04/26 2000-0600 : Closed :, Start time: 07/04/2026 20:00 , Expected end time: 09/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 8:05Travel delays Wales.
- M4 : Westbound : J38 Margam to J41 Pentyla/Baglan : 07/04/26-09/04/26 2000-0600 : Closed :Description: M4 : Westbound : J38 Margam to J41 Pentyla/Baglan : 07/04/26-09/04/26 2000-0600 : Closed :, Start time: 07/04/2026 20:00 , Expected end time: 09/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 8:43Travel delays Wales.
- M4 : Eastbound : J42 Earlswood to J40 Taibach : 09/04/26-10/04/26 2000-0600 : Closed :Description: M4 : Eastbound : J42 Earlswood to J40 Taibach : 09/04/26-10/04/26 2000-0600 : Closed :, Start time: 09/04/2026 20:00 , Expected end time: 10/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 9:07Travel delays Wales.
- M4 : Eastbound : J43 Llandarcy : 07/04/26-11/04/26 2000-0600 : Closed :Description: M4 : Eastbound : J43 Llandarcy : 07/04/26-11/04/26 2000-0600 : Closed :, Start time: 07/04/2026 20:00 , Expected end time: 11/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 9:28Travel delays Wales.
- M48 : Westbound : J1 Aust to J2 Newhouse : 08/04/26-10/04/26 2000-0600 : Closed :Description: M48 : Westbound : J1 Aust to J2 Newhouse : 08/04/26-10/04/26 2000-0600 : Closed :, Start time: 08/04/2026 20:00 , Expected end time: 10/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 9:30Travel delays Wales.
- M48 : Westbound : J1 Aust to J2 Newhouse : 08/04/26-10/04/26 2000-0600 :Description: M48 : Westbound : J1 Aust to J2 Newhouse : 08/04/26-10/04/26 2000-0600 :, Start time: 08/04/2026 20:00 , Expected end time: 10/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 9:50Travel delays Wales.
- M48 : Westbound : J1 Aust : 08/04/26-10/04/26 2000-0600 : Closed :Description: M48 : Westbound : J1 Aust : 08/04/26-10/04/26 2000-0600 : Closed :, Start time: 08/04/2026 20:00 , Expected end time: 10/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 9:51Travel delays Wales.
- M4 : Westbound : J33 Capel Llanilltern to J34 Miskin : 10/04/26-11/04/26 2000-0600 : Closed :Description: M4 : Westbound : J33 Capel Llanilltern to J34 Miskin : 10/04/26-11/04/26 2000-0600 : Closed :, Start time: 10/04/2026 20:00 , Expected end time: 11/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 02/04/2026 17:49Travel delays Wales.
- M4 : Westbound : J33 Capel Llanilltern to J34 Miskin : 10/04/26-11/04/26 2000-0600 : Closed :Description: M4 : Westbound : J33 Capel Llanilltern to J34 Miskin : 10/04/26-11/04/26 2000-0600 : Closed :, Start time: 10/04/2026 20:00 , Expected end time: 11/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 03/04/2026 7:39Travel delays Wales.
- M4 : Eastbound : J42 Earlswood to A48 Briton Ferry Roundabout : Resurfacing work : Road closed : Diversions in place : 08/04/26-09/04/26 2000-0600 :Description: M4 : Eastbound : J42 Earlswood to A48 Briton Ferry Roundabout : Resurfacing work : Road closed : Diversions in place : 08/04/26-09/04/26 2000-0600 :, Start time: 08/04/2026 20:00 , End Date: 09/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 24/03/2026 15:21Travel delays Wales.
- M4 : Westbound : J28 Tredegar Park to J25A Grove Park : 10/04/26-11/04/26 2000-0600 : Carriageway maintenance : Road closed :Description: M4 : Westbound : J28 Tredegar Park to J25A Grove Park : 10/04/26-11/04/26 2000-0600 : Carriageway maintenance : Road closed :, Start time: 10/04/2026 20:00 , End Date: 11/04/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 02/04/2026 17:32Travel delays Wales.
M4 Motorway Map
Live traffic flow information. Avoid M4 travel congestion and plan a smarter route.
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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.