M4 Traffic

M4 17:04pm

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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:

J24 COLDRA TO J26 MALPAS
Description: M4WestboundJ24 (Newport) Coldra to J26 (Newport) MalpasCongestionDelay: s possible :,Start time: 25/05/2025 12:39 ,Expected end time:25/05/2025 16:39,Severity: Moderate,Source: Welsh Government,Last updated: 25/05/2025 12:39
Nearest town: 1.17m from Caerleon. CLEARED @ 12:42
J26 MALPAS TO J25 CAERLEON
Description: M4EastboundJ26 (Newport) Malpas to J25 (Caerleon) CaerleonCongestionDelay: s possible :,Start time: 25/05/2025 11:54 ,Expected end time:25/05/2025 13:54,Severity: Moderate,Source: Welsh Government,Last updated: 25/05/2025 11:54
Nearest town: 1.48m from Newport. CLEARED @ 12:06
CONGESTION
Location: The M4 westbound exit slip at junction J8 (High Wycombe) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 14:00 and 14:15 on 25 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.89m from Bray. CLEARED @ 14:06
J48 HENDY
Description: M4WestboundJ48 (Pontarddulais) HendyCarriageway maintenanceRoad closedDiversions in place27/05/25-29/05/25 2000-0600 :,Start time: 27/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 12:38
Nearest town: 0.44m from Hendy. CLEARED @ 12:54
J42 EARLSWOOD
Description: M4WestboundJ42 (Swansea) EarlswoodCarriageway maintenanceRoad closedDiversions in place28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 12:37
Nearest town: 1.21m from Llandarcy. CLEARED @ 12:54
CONGESTION
Location: The M4 eastbound exit slip at junction J8 (High Wycombe) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 12:30 and 12:45 on 25 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.17m from Bray. CLEARED @ 12:36
J38 MARGAM
Description: M4EastboundJ38 (Port Talbot) MargamCarriageway maintenanceRoad closedDiversions in place28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:52
Nearest town: 0.13m from Margam. CLEARED @ 12:18
J37 PYLE
Description: M4EastboundJ37 (Porthcawl) PyleCarriageway maintenanceRoad closedDiversions in place28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:50
Nearest town: 1.64m from Kenfig. CLEARED @ 12:18
J36 SARN
Description: M4WestboundJ36 (Bridgend) SarnCarriageway maintenanceRoad closedDiversions in place29/05/25-30/05/25 2000-0600 :,Start time: 29/05/2025 20:00 ,End Date:30/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:49
Nearest town: 1.91m from Bridgend. CLEARED @ 12:06
J30 CARDIFF GATE TO J32 CORYTON
Description: M4WestboundJ30 (Cardiff) Cardiff Gate to J32 (Cardiff) CorytonCarriageway maintenanceRoad closedDiversions in place27/05/25-31/05/25 2000-0600 :,Start time: 27/05/2025 20:00 ,End Date:31/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:47
Nearest town: 0.88m from Lisvane. CLEARED @ 12:06
CONGESTION
Location: The M4 westbound between junctions J1 (London)and J2 (N.Circular) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 12:00 and 12:15 on 25 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.63m from Chiswick. CLEARED @ 12:09
CONGESTION
Location: The M4 westbound exit slip at junction J8 (High Wycombe) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 13:30 and 13:45 on 25 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.89m from Bray. CLEARED @ 12:36
J28 TREDEGAR PARK TO J26 MALPAS
Description: M4EastboundJ28 (Newport) Tredegar Park to J26 (Newport) MalpasCongestionDelay: s possible :,Start time: 25/05/2025 11:12 ,Expected end time:25/05/2025 15:11,Severity: Slight,Source: Welsh Government,Last updated: 25/05/2025 11:12
Nearest town: 0.98m from Bassaleg. CLEARED @ 11:18


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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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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Description: M4 : Westbound : J24 (Newport) Coldra to J26 (Newport) Malpas : Congestion : Delays possible :,Start time: 25/05/2025 12:39 ,Expected end time:25/05/2025 16:39,Severity: Moderate,Source: Welsh Government,Last updated: 25/05/2025 12:39
Nearest town: 1.17m from Caerleon.

51.6--2.96

Description: M4 : Eastbound : J26 (Newport) Malpas to J25 (Caerleon) Caerleon : Congestion : Delays possible :,Start time: 25/05/2025 11:54 ,Expected end time:25/05/2025 13:54,Severity: Moderate,Source: Welsh Government,Last updated: 25/05/2025 11:54
Nearest town: 1.48m from Newport.

51.6--2.99

Location: westbound exit slip at junction J8 (High Wycombe) .

Due to: Congestion.



Normal traffic conditions are expected between 14:00 and 14:15 on 25 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.89m from Bray.

51.5--0.72

Description: M4 : Westbound : J48 (Pontarddulais) Hendy : Carriageway maintenance : Road closed : Diversions in place : 27/05/25-29/05/25 2000-0600 :,Start time: 27/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 12:38
Nearest town: 0.44m from Hendy.

51.71--4.06

Description: M4 : Westbound : J42 (Swansea) Earlswood : Carriageway maintenance : Road closed : Diversions in place : 28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 12:37
Nearest town: 1.21m from Llandarcy.

51.63--3.84

Location: eastbound exit slip at junction J8 (High Wycombe) .

Due to: Congestion.



Normal traffic conditions are expected between 12:30 and 12:45 on 25 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.17m from Bray.

51.5--0.73

Description: M4 : Eastbound : J38 (Port Talbot) Margam : Carriageway maintenance : Road closed : Diversions in place : 28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:52
Nearest town: 0.13m from Margam.

51.56--3.74

Description: M4 : Eastbound : J37 (Porthcawl) Pyle : Carriageway maintenance : Road closed : Diversions in place : 28/05/25-29/05/25 2000-0600 :,Start time: 28/05/2025 20:00 ,End Date:29/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:50
Nearest town: 1.64m from Kenfig.

51.52--3.69

Description: M4 : Westbound : J36 (Bridgend) Sarn : Carriageway maintenance : Road closed : Diversions in place : 29/05/25-30/05/25 2000-0600 :,Start time: 29/05/2025 20:00 ,End Date:30/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:49
Nearest town: 1.91m from Bridgend.

51.53--3.58

Description: M4 : Westbound : J30 (Cardiff) Cardiff Gate to J32 (Cardiff) Coryton : Carriageway maintenance : Road closed : Diversions in place : 27/05/25-31/05/25 2000-0600 :,Start time: 27/05/2025 20:00 ,End Date:31/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 23/05/2025 11:47
Nearest town: 0.88m from Lisvane.

51.55--3.19

Location: westbound between junctions J1 (London)and J2 (N.Circular) .

Due to: Congestion.



Normal traffic conditions are expected between 12:00 and 12:15 on 25 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.63m from Chiswick.

51.49--0.28

Location: westbound exit slip at junction J8 (High Wycombe) .

Due to: Congestion.



Normal traffic conditions are expected between 13:30 and 13:45 on 25 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.89m from Bray.

51.5--0.72

Description: M4 : Eastbound : J28 (Newport) Tredegar Park to J26 (Newport) Malpas : Congestion : Delays possible :,Start time: 25/05/2025 11:12 ,Expected end time:25/05/2025 15:11,Severity: Slight,Source: Welsh Government,Last updated: 25/05/2025 11:12
Nearest town: 0.98m from Bassaleg.

51.59--3.03