M4 Traffic

M4 16:24pm

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SEVERE
FULL SCREENUPDATED: 16:24
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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:

BROKEN DOWN VEHICLE
Location: The M4 eastbound exit slip at junction J15 (Swindon) .
Lane closures: The hard shoulder and lane 1 are closed.
Reason: Broken down vehicle.
Status: Currently Active.
Time to clear: The event is expected to clear between 17:15 and 17:30 on 4 May 2026.
Return to normal: Normal traffic conditions are expected between 17:00 and 17:15 on 4 May 2026.
Lanes closed: There is one of two lanes closed.
Nearest town: 2.5m from Swindon.
J28 TREDEGAR PARK TO J26 MALPAS
Description: M4EastboundJ28 (Newport) Tredegar Park to J26 (Newport) MalpasCongestionDelay: s possible :,Start time: 04/05/2026 11:31 ,Expected end time:04/05/2026 13:31,Severity: Moderate,Source: Welsh Government,Last updated: 04/05/2026 11:31
Nearest town: 0.98m from Bassaleg. CLEARED @ 11:42
CONGESTION
Location: The M4 eastbound exit slip at junction J4 .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 14:30 and 14:45 on 4 May 2026.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.04m from Heathrow. CLEARED @ 14:42
J45 YNYSFORGAN TO J46 LLANGYFELACH
Description: M4WestboundJ45 (Swansea) Ynysforgan to J46 (Swansea) LlangyfelachRoad closed05/05/26-06/05/26 2000-0600Diversions in place :,Start time: 05/05/2026 20:00 ,End Date:06/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:57
Nearest town: 1.63m from Clydach. CLEARED @ 13:18
J44 LON LAS
Description: M4WestboundJ44 (Swansea) Lon LasOnslip closedOffslip closed06/05/26 1900-0000Diversions in place :,Start time: 06/05/2026 19:00 ,End Date:06/05/2026 0:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:52
Nearest town: 1.28m from Glais. CLEARED @ 13:18
J46 LLANGYFELACH TO J45 YNYSFORGAN
Description: M4EastboundJ46 (Swansea) Llangyfelach to J45 (Swansea) YnysforganRoad closed06/05/26-07/05/26 2000-0600Diversions in place :,Start time: 06/05/2026 20:00 ,End Date:07/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:58
Nearest town: 1.63m from Clydach. CLEARED @ 13:18
J44 LON LAS
Description: M4EastboundJ44 (Swansea) Lon LasOffslip closedOnslip closed05/05/26 1900-0000Diversions in place :,Start time: 05/05/2026 19:00 ,End Date:05/05/2026 0:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:39
Nearest town: 1.28m from Glais. CLEARED @ 13:06
J28 TREDEGAR PARK
Description: M4WestboundJ28 (Newport) Tredegar ParkOnslip closed07/05/26-08/05/26 2000-0600Diversions in place :,Start time: 07/05/2026 20:00 ,End Date:08/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:32
Nearest town: 1.15m from Bassaleg. CLEARED @ 12:54


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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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 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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Location: eastbound exit slip at junction J15 (Swindon) .

Lane Closures : The hard shoulder and lane 1 are closed.

Due to: Broken down vehicle.



Time To Clear : The event is expected to clear between 17:15 and 17:30 on 4 May 2026.

Normal traffic conditions are expected between 17:00 and 17:15 on 4 May 2026.

Lanes Closed : There is one of two lanes closed.
Nearest town: 2.5m from Swindon.

51.53--1.73

Description: M4 : Eastbound : J28 (Newport) Tredegar Park to J26 (Newport) Malpas : Congestion : Delays possible :,Start time: 04/05/2026 11:31 ,Expected end time:04/05/2026 13:31,Severity: Moderate,Source: Welsh Government,Last updated: 04/05/2026 11:31
Nearest town: 0.98m from Bassaleg.

51.59--3.03

Location: eastbound exit slip at junction J4 .

Due to: Congestion.



Normal traffic conditions are expected between 14:30 and 14:45 on 4 May 2026.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.04m from Heathrow.

51.5--0.45

Description: M4 : Westbound : J45 (Swansea) Ynysforgan to J46 (Swansea) Llangyfelach : Road closed : 05/05/26-06/05/26 2000-0600 : Diversions in place :,Start time: 05/05/2026 20:00 ,End Date:06/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:57
Nearest town: 1.63m from Clydach.

51.68--3.94

Description: M4 : Westbound : J44 (Swansea) Lon Las : Onslip closed : Offslip closed : 06/05/26 1900-0000 : Diversions in place :,Start time: 06/05/2026 19:00 ,End Date:06/05/2026 0:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:52
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Eastbound : J46 (Swansea) Llangyfelach to J45 (Swansea) Ynysforgan : Road closed : 06/05/26-07/05/26 2000-0600 : Diversions in place :,Start time: 06/05/2026 20:00 ,End Date:07/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:58
Nearest town: 1.63m from Clydach.

51.68--3.94

Description: M4 : Eastbound : J44 (Swansea) Lon Las : Offslip closed : Onslip closed : 05/05/26 1900-0000 : Diversions in place :,Start time: 05/05/2026 19:00 ,End Date:05/05/2026 0:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:39
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Westbound : J28 (Newport) Tredegar Park : Onslip closed : 07/05/26-08/05/26 2000-0600 : Diversions in place :,Start time: 07/05/2026 20:00 ,End Date:08/05/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 01/05/2026 12:32
Nearest town: 1.15m from Bassaleg.

51.56--3.04