M4 Traffic

M4 02:04am

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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:

J44 LON LAS

Description: M4WestboundJ44 (Swansea) Lon Las06/03/25-07/03/25 1930-0100Cyclic maintenanceEntry slip road closedDiversions in place :,Start time: 06/03/2025 19:30 ,End Date:07/03/2025 1:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:41
Nearest town: 1.28m from Glais. CLEARED @ 23:18

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

Description: M4WestboundJ22 (Avonmouth) Pilning/Prince of Wales Bridge to J23 (Chepstow) Rogiet04/03/25-05/03/25 2100-0600Maintenance workDiversions in place :,Start time: 04/03/2025 21:00 ,End Date:05/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 14:08
Nearest town: 0.81m from Portskewett. CLEARED @ 23:18

J28 TREDEGAR PARK

Description: M4WestboundJ28 (Newport) Tredegar Park02/03/25-07/03/25 2000-0600Clearance workEntry slip road closedDiversions in place :,Start time: 02/03/2025 20:00 ,End Date:07/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:46
Nearest town: 1.15m from Bassaleg. CLEARED @ 23:18

J45 YNYSFORGAN

Description: M4WestboundJ45 (Swansea) Ynysforgan02/03/25-03/03/25 2000-0600Improvement workEntry slip road closedDiversions in place :,Start time: 02/03/2025 20:00 ,End Date:03/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:32
Nearest town: 0.77m from Clydach. CLEARED @ 23:18

J44 LON LAS

Description: M4EastboundJ44 (Swansea) Lon Las05/03/25-06/03/25 1930-0100Cyclic maintenanceEntry slip road closedDiversions in place :,Start time: 05/03/2025 19:30 ,End Date:06/03/2025 1:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:38
Nearest town: 1.28m from Glais. CLEARED @ 23:18

J48 HENDY

Description: M4EastboundJ48 (Pontarddulais) Hendy03/03/25-08/03/25 2000-0600onslipCarriageway maintenanceClosedDiversions in place :,Start time: 03/03/2025 20:00 ,End Date:08/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:25
Nearest town: 0.44m from Hendy. CLEARED @ 23:18

J28 TREDEGAR PARK

Description: M4EastboundJ28 (Newport) Tredegar Park03/03/25-07/03/25 2000-0600Clearance workExit slip road closedDiversions in place :,Start time: 03/03/2025 20:00 ,End Date:07/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:44
Nearest town: 1.15m from Bassaleg. CLEARED @ 23:18

J44 LON LAS

J28 TREDEGAR PARK

J45 YNYSFORGAN

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J48 HENDY

J44 LON LAS

J48 HENDY

J44 LON LAS

J45 YNYSFORGAN

J44 LON LAS

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J48 HENDY

J45 YNYSFORGAN

J44 LON LAS

J45 YNYSFORGAN

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J28 TREDEGAR PARK

J48 HENDY

J44 LON LAS

J48 HENDY

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J28 TREDEGAR PARK

J44 LON LAS

J45 YNYSFORGAN

J44 LON LAS

J48 HENDY

J44 LON LAS

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J45 YNYSFORGAN

J28 TREDEGAR PARK

J22 PILNING/PRINCE OF WALES BRIDGE TO J23 ROGIET

J44 LON LAS

J45 YNYSFORGAN

J44 LON LAS

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.

Let's Get Social

Get in touch with us or stay up to date with our latest news and updates.

Live Email Traffic Alerts

Get live email alerts whenever there is a traffic incident or roadworks on the M4 that may cause congestion or jams.

LEGAL NOTICE

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 England

Official source of traffic updates.

Transport for London (TFL)

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

Traffic Wales

The Welsh government's traffic information service for Wales.

Traffic Scotland

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

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Description: M4 : Westbound : J44 (Swansea) Lon Las : 06/03/25-07/03/25 1930-0100 : Cyclic maintenance : Entry slip road closed : Diversions in place :,Start time: 06/03/2025 19:30 ,End Date:07/03/2025 1:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:41
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Westbound : J22 (Avonmouth) Pilning/Prince of Wales Bridge to J23 (Chepstow) Rogiet : 04/03/25-05/03/25 2100-0600 : Maintenance work : Diversions in place :,Start time: 04/03/2025 21:00 ,End Date:05/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 14:08
Nearest town: 0.81m from Portskewett.

51.58--2.74

Description: M4 : Westbound : J28 (Newport) Tredegar Park : 02/03/25-07/03/25 2000-0600 : Clearance work : Entry slip road closed : Diversions in place :,Start time: 02/03/2025 20:00 ,End Date:07/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:46
Nearest town: 1.15m from Bassaleg.

51.56--3.04

Description: M4 : Westbound : J45 (Swansea) Ynysforgan : 02/03/25-03/03/25 2000-0600 : Improvement work : Entry slip road closed : Diversions in place :,Start time: 02/03/2025 20:00 ,End Date:03/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:32
Nearest town: 0.77m from Clydach.

51.68--3.92

Description: M4 : Eastbound : J44 (Swansea) Lon Las : 05/03/25-06/03/25 1930-0100 : Cyclic maintenance : Entry slip road closed : Diversions in place :,Start time: 05/03/2025 19:30 ,End Date:06/03/2025 1:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:38
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Eastbound : J48 (Pontarddulais) Hendy : 03/03/25-08/03/25 2000-0600 : onslip : Carriageway maintenance : Closed : Diversions in place :,Start time: 03/03/2025 20:00 ,End Date:08/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:25
Nearest town: 0.44m from Hendy.

51.71--4.06

Description: M4 : Eastbound : J28 (Newport) Tredegar Park : 03/03/25-07/03/25 2000-0600 : Clearance work : Exit slip road closed : Diversions in place :,Start time: 03/03/2025 20:00 ,End Date:07/03/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/03/2025 9:44
Nearest town: 1.15m from Bassaleg.

51.56--3.04

51.66--3.88

51.56--3.04

51.68--3.92

51.56--3.04

51.58--2.74

51.71--4.06

51.66--3.88

51.71--4.06

51.66--3.88

51.68--3.92

51.66--3.88

51.56--3.04

51.58--2.74

51.56--3.04

51.58--2.74

51.71--4.06

51.68--3.92

51.66--3.88

51.68--3.92

51.58--2.74

51.56--3.04

51.71--4.06

51.66--3.88

51.71--4.06

51.56--3.04

51.58--2.74

51.56--3.04

51.66--3.88

51.68--3.92

51.66--3.88

51.71--4.06

51.66--3.88

51.56--3.04

51.58--2.74

51.68--3.92

51.56--3.04

51.58--2.74

51.66--3.88

51.68--3.92

51.66--3.88

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