M4 Traffic

M4 07:24am

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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:

J25 CAERLEON TO J24 COLDRA
Description: M4EastboundJ25 (Caerleon) Caerleon to J24 (Newport) ColdraIncidentDelay: s possible :,Start time: 26/07/2025 6:27 ,Expected end time:26/07/2025 8:27,Severity: Moderate,Source: Welsh Government,Last updated: 26/07/2025 6:27
Nearest town: 1.32m from Caerleon. CLEARED @ 06:42
J32 CORYTON TO J30 CARDIFF GATE
Description: M4EastboundJ32 (Cardiff) Coryton to J30 (Cardiff) Cardiff GateLane closedDue to Maintenance worksDelay: s possible :,Start time: 24/07/2025 5:00 ,End Date:20/08/2025 6:00,Severity: Moderate,Source: Welsh Government, Last updated: 24/07/2025 5:23
Nearest town: 0.88m from Lisvane. CLEARED @ 05:54
BROKEN DOWN VEHICLE
Location: The M4 westbound between junctions J19 (Bristol)and J20 (Bristol) .
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 06:30 and 06:45 on 26 Jul 2025.
Return to normal: Normal traffic conditions are expected between 06:30 and 06:45 on 26 Jul 2025.
Lanes closed: There is one of three lanes closed.
Nearest town: 4.83m from Alveston. CLEARED @ 05:51
J32 CORYTON TO J30 CARDIFF GATE
Description: M4EastboundJ32 (Cardiff) Coryton to J30 (Cardiff) Cardiff GateResurfacing workRoad closedDiversions in place23/07/25-21/08/25 2000-0600 :,Start time: 23/07/2025 20:00 ,End Date:21/08/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/07/2025 20:00
Nearest town: 0.88m from Lisvane. CLEARED @ 02:18
J37 PYLE TO J39 GROES
Description: M4Both directionsJ37 (Porthcawl) Pyle to J39 GroesConstruction workRoad closedDiversions in place24/07/25-29/07/25 2000-0600 :,Start time: 24/07/2025 20:00 ,End Date:29/07/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 24/07/2025 20:00
Nearest town: 1.55m from Kenfig. CLEARED @ 02:18


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 : J25 (Caerleon) Caerleon to J24 (Newport) Coldra : Incident : Delays possible :,Start time: 26/07/2025 6:27 ,Expected end time:26/07/2025 8:27,Severity: Moderate,Source: Welsh Government,Last updated: 26/07/2025 6:27
Nearest town: 1.32m from Caerleon.

51.6--2.95

Description: M4 : Eastbound : J32 (Cardiff) Coryton to J30 (Cardiff) Cardiff Gate : Lane closed : Due to Maintenance works : Delays possible :,Start time: 24/07/2025 5:00 ,End Date:20/08/2025 6:00,Severity: Moderate,Source: Welsh Government, Last updated: 24/07/2025 5:23
Nearest town: 0.88m from Lisvane.

51.55--3.19

Location: westbound between junctions J19 (Bristol)and J20 (Bristol) .

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 06:30 and 06:45 on 26 July 2025.

Normal traffic conditions are expected between 06:30 and 06:45 on 26 July 2025.

Lanes Closed : There is one of three lanes closed.
Nearest town: 4.83m from Alveston.

51.52--2.52

Description: M4 : Eastbound : J32 (Cardiff) Coryton to J30 (Cardiff) Cardiff Gate : Resurfacing work : Road closed : Diversions in place : 23/07/25-21/08/25 2000-0600 :,Start time: 23/07/2025 20:00 ,End Date:21/08/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/07/2025 20:00
Nearest town: 0.88m from Lisvane.

51.55--3.19

Description: M4 : Both directions : J37 (Porthcawl) Pyle to J39 Groes : Construction work : Road closed : Diversions in place : 24/07/25-29/07/25 2000-0600 :,Start time: 24/07/2025 20:00 ,End Date:29/07/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 24/07/2025 20:00
Nearest town: 1.55m from Kenfig.

51.54--3.73