M4 Traffic

M4 18:54pm

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SEVERE
FULL SCREENUPDATED: 18:54
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Traffic incidents

The following traffic incidents and congestion for M4 have been reported by Highways England, Traffic Scotland, Traffic Wales or Transport for London (TfL) in the last two hours:

J28 TREDEGAR PARK TO J26 MALPAS
Description: M4EastboundJ28 (Newport) Tredegar Park to J26 (Newport) MalpasRoadworksRoad closedDiversions in place02/11/26-07/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:07/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:46
Nearest town: 0.98m from Bassaleg. CLEARED @ 18:30
J24 COLDRA
Description: M4WestboundJ24 (Newport) ColdraRoadworksExit slip road closedDiversions in place01/11/26-06/11/26 2000-0600 :,Start time: 01/11/2026 20:00 ,End Date:06/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:45
Nearest town: 1.85m from Caerleon. CLEARED @ 18:30
J45 YNYSFORGAN
Description: M4WestboundJ45 (Swansea) YnysforganResurfacing workEntry slip road closedand Exit slip road closedDiversions in place03/11/26-05/11/26 2000-0600 :,Start time: 03/11/2026 20:00 ,End Date:05/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:55
Nearest town: 0.77m from Clydach. CLEARED @ 18:30
J44 LON LAS
Description: M4WestboundJ44 (Swansea) Lon LasRoadworksExit slip road closedand Entry slip road closedDiversions in place01/11/26-03/11/26 2000-0600 :,Start time: 01/11/2026 20:00 ,End Date:03/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:54
Nearest town: 1.28m from Glais. CLEARED @ 18:30
J42 EARLSWOOD
Description: M4WestboundJ42 (Swansea) EarlswoodRoadworksExit slip road closedDiversions in place03/11/26-07/11/26 2000-0600 :,Start time: 03/11/2026 20:00 ,End Date:07/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:53
Nearest town: 1.21m from Llandarcy. CLEARED @ 18:30
J41 PENTYLA/BAGLAN TO J38 MARGAM
Description: M4EastboundJ41 (Port Talbot) Pentyla/Baglan to J38 (Port Talbot) MargamRoadworksRoad closedDiversions in place04/11/26-06/11/26 2000-0600 :,Start time: 04/11/2026 20:00 ,End Date:06/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:52
Nearest town: 1.35m from Port Talbot. CLEARED @ 18:30
J41 PENTYLA/BAGLAN
Description: M4EastboundJ41 (Port Talbot) Pentyla/BaglanRoadworksExit slip road closedDiversions in place02/11/26-03/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:03/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:51
Nearest town: 0.49m from Port Talbot. CLEARED @ 18:30
J38 MARGAM TO J41 PENTYLA/BAGLAN
Description: M4WestboundJ38 (Port Talbot) Margam to J41 (Port Talbot) Pentyla/BaglanRoadworksRoad closedDiversions in place02/11/26-04/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:04/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:49
Nearest town: 1.35m from Port Talbot. CLEARED @ 18:30
J37 PYLE
Description: M4WestboundJ37 (Porthcawl) PyleRoadworksExit slip road closedDiversions in place04/11/26-05/11/26 2000-0600 :,Start time: 04/11/2026 20:00 ,End Date:05/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:48
Nearest town: 1.64m from Kenfig. CLEARED @ 18:30


There are no current incidents in this location.

M4 Roadworks

The following roadworks have been reported by various highways agencies and official transport sources.Click on a roadworks item to view more details on the traffic map.

M4

The M4 is a motorway in the United Kingdom that connects London and South West England. It runs from London to South Wales and it is a crucial part of the English transport network.

The M4 was first proposed in 1927 and construction began in 1958. It was completed in 1971, running from London to Reading, Berkshire and later extending to South Wales.

The M4 is one of the major roads in the UK and a significant part of the economy. The M4 has been upgraded in certain sections and currently consists of 146 miles (235 km) of motorway.

The M4 is one of the safest motorways in the UK. According to the Department of Transport (DfT), the M4 had a collision rate of just 0.41 per million vehicle kilometres between 2017-2018. This is lower than the UK major-road average of 0.71.

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Please remember that it is against the law to use your mobile phone, tablet or any electronic device without a hands-free kit whilst driving.If you're caught by the police using any device that can send or receive data whilst driving or riding a motorcyle you'll get an automatic fixed penalty notice, 6 points on your licence and a fine of £200.A court could also disqualify you from driving.

Elsewhere on the web:

National Highways TrafficNational Highways England

Official source of traffic updates.

Transport for LondonTransport for London (TFL)

Transport for London's (TfL) portal for transportation in London.

Traffic WalesTraffic Wales

The Welsh government's traffic information service for Wales.

Traffic ScotlandTraffic Scotland

Live traffic conditions and news for Scotland's road network.

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Description: M4 : Eastbound : J28 (Newport) Tredegar Park to J26 (Newport) Malpas : Roadworks : Road closed : Diversions in place : 02/11/26-07/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:07/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:46
Nearest town: 0.98m from Bassaleg.

51.59--3.03

Description: M4 : Westbound : J24 (Newport) Coldra : Roadworks : Exit slip road closed : Diversions in place : 01/11/26-06/11/26 2000-0600 :,Start time: 01/11/2026 20:00 ,End Date:06/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:45
Nearest town: 1.85m from Caerleon.

51.6--2.92

Description: M4 : Westbound : J45 (Swansea) Ynysforgan : Resurfacing work : Entry slip road closed : and Exit slip road closed : Diversions in place : 03/11/26-05/11/26 2000-0600 :,Start time: 03/11/2026 20:00 ,End Date:05/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:55
Nearest town: 0.77m from Clydach.

51.68--3.92

Description: M4 : Westbound : J44 (Swansea) Lon Las : Roadworks : Exit slip road closed : and Entry slip road closed : Diversions in place : 01/11/26-03/11/26 2000-0600 :,Start time: 01/11/2026 20:00 ,End Date:03/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:54
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Westbound : J42 (Swansea) Earlswood : Roadworks : Exit slip road closed : Diversions in place : 03/11/26-07/11/26 2000-0600 :,Start time: 03/11/2026 20:00 ,End Date:07/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:53
Nearest town: 1.21m from Llandarcy.

51.63--3.84

Description: M4 : Eastbound : J41 (Port Talbot) Pentyla/Baglan to J38 (Port Talbot) Margam : Roadworks : Road closed : Diversions in place : 04/11/26-06/11/26 2000-0600 :,Start time: 04/11/2026 20:00 ,End Date:06/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:52
Nearest town: 1.35m from Port Talbot.

51.58--3.77

Description: M4 : Eastbound : J41 (Port Talbot) Pentyla/Baglan : Roadworks : Exit slip road closed : Diversions in place : 02/11/26-03/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:03/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:51
Nearest town: 0.49m from Port Talbot.

51.6--3.79

Description: M4 : Westbound : J38 (Port Talbot) Margam to J41 (Port Talbot) Pentyla/Baglan : Roadworks : Road closed : Diversions in place : 02/11/26-04/11/26 2000-0600 :,Start time: 02/11/2026 20:00 ,End Date:04/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:49
Nearest town: 1.35m from Port Talbot.

51.58--3.77

Description: M4 : Westbound : J37 (Porthcawl) Pyle : Roadworks : Exit slip road closed : Diversions in place : 04/11/26-05/11/26 2000-0600 :,Start time: 04/11/2026 20:00 ,End Date:05/11/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 30/10/2026 13:48
Nearest town: 1.64m from Kenfig.

51.52--3.69