M4 Traffic

M4 22:54pm

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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:

J27 HIGH CROSS TO J26 MALPAS
Description: M4EastboundJ27 (High Cross) High Cross to J26 (Newport) MalpasIncidentAccidentLanes closedDelay: s possible :,Start time: 12/06/2025 18:37 ,Expected end time:12/06/2025 20:37,Severity: Severe,Source: Welsh Government,Last updated: 12/06/2025 18:37
Nearest town: 1.53m from Bassaleg. CLEARED @ 18:43
WESTBOUND
Description: M4Now clearWestboundJ23A (Magor) Magor to J26 (Newport) Malpas,Start time: 12/06/2025 18:47 ,Expected end time:12/06/2025 18:52,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 18:47
Nearest town: 1.58m from Caerleon. CLEARED @ 19:19
WESTBOUND
Description: M4Now clearWestboundJ37 (Porthcawl) Pyle to J38 (Port Talbot) Margam,Start time: 12/06/2025 18:25 ,Expected end time:12/06/2025 18:30,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 18:25
Nearest town: 1.25m from Kenfig. CLEARED @ 19:19
EASTBOUND
Description: M4Now clearEastboundJ45 (Swansea) Ynysforgan to J43 (Neath) Llandarcy,Start time: 12/06/2025 17:50 ,Expected end time:12/06/2025 17:55,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 17:50
Nearest town: 1.28m from Glais. CLEARED @ 19:07
J37 PYLE TO J39 GROES
Description: M4WestboundJ37 (Porthcawl) Pyle to J39 GroesCarriageway maintenanceRoad closedDiversions in place09/06/25-15/06/25 2000-0600 :,Start time: 09/06/2025 20:00 ,End Date:15/06/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 09/06/2025 20:00
Nearest town: 1.55m from Kenfig. CLEARED @ 21:31
J38 MARGAM TO J37 PYLE
Description: M4EastboundJ38 (Port Talbot) Margam to J37 (Porthcawl) PyleCarriageway maintenanceRoad closedDiversions in place09/06/25-15/06/25 2000-0600 :,Start time: 09/06/2025 20:00 ,End Date:15/06/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 09/06/2025 20:00
Nearest town: 1.25m from Kenfig. CLEARED @ 21:31
BOTH DIRECTIONS
Description: M4Now clearBoth directionsJ43 (Neath) Llandarcy to J49 Pont Abraham,Start time: 12/06/2025 17:56 ,Expected end time:12/06/2025 18:01,Severity: Slight,Source: Welsh Government,Last updated: 12/06/2025 17:56
Nearest town: 1.87m from Felindre. CLEARED @ 19:19
J43 LLANDARCY TO J49 PONT ABRAHAM
Description: M4Both directionsJ43 (Neath) Llandarcy to J49 Pont AbrahamDelay: s possible :,Start time: 12/06/2025 17:00 ,Expected end time:12/06/2025 21:00,Severity: Slight,Source: Welsh Government,Last updated: 12/06/2025 17:00
Nearest town: 1.87m from Felindre. CLEARED @ 17:07


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.

ROAD WORKS
Location: The M4 eastbound entry slip at junction J3 (Heathrow) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 2.5m from Heathrow.
ROAD WORKS
Location: The M4 eastbound entry slip at junction J2 (N.Circular) .
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 0.98m from Ealing.
ROAD WORKS
Location: The M4 eastbound between junctions J4and J3 (Heathrow) .
Lane closures: Lane one will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: There will be one of four lanes closed.
Nearest town: 2.03m from Heathrow.
ROAD WORKS
Location: The M4 eastbound entry slip at Heston Services.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 2.16m from Hounslow.
ROAD WORKS
Location: The M4 eastbound exit slip at Heston Services.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 2.37m from Hounslow.
ROAD WORKS
Location: The M4 eastbound exit slip at junction J2 (N.Circular) .
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 0.99m from Ealing.
ROAD WORKS
Location: The M4 eastbound between junctions J3 (Heathrow)and J1 (London) .
Lane closures: Lanes 1,2 and 3 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 22:00 and 05:30 from 19 Jun 2025 to 21 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 2.31m from Heathrow.
ROAD WORKS
Location: The M4 eastbound between junctions J17 (Chippenham)and J16 (Swindon) .
Lane closures: Lane one will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 21:00 on 19 Jun 2025 to 06:00 on 20 Jun 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 1.84m from Wootton Bassett.
ROAD WORKS
Location: The M4 westbound between junctions J16 (Swindon)and J17 (Chippenham) .
Lane closures: Lane one will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 21:00 on 19 Jun 2025 to 06:00 on 20 Jun 2025.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 2.12m from Wootton Bassett.
ROAD WORKS
Location: The M4 westbound entry slip at junction J16 (Swindon) .
Lane closures: Lane one will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 21:00 on 19 Jun 2025 to 06:00 on 20 Jun 2025.
Lanes Closed: There will be one of two lanes closed.
Nearest town: 2.09m from Wootton Bassett.
ROAD WORKS
Location: The M4 eastbound entry slip at junction J11 (Basingstoke) .
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 21:00 on 19 Jun 2025 to 06:00 on 20 Jun 2025.
Lanes Closed: All lanes will be closed.
Nearest town: 1.9m from Reading.
ROAD WORKS
Location: The M4 eastbound between junctions J14 (Hungerford)and J13 (Newbury) .
Reason: Roadworks scheme is planned.
Status: Pending.
Schedule: From 20:00 on 25 Jun 2025 to 06:00 on 9 Jul 2025.
Nearest town: 2.9m from Hungerford.
ROAD WORKS
Location: The M4 eastbound between junctions J14 (Hungerford)and J13 (Newbury) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 20:00 and 06:00 from 25 Jun 2025 to 28 Jun 2025.
Schedule: Expect disruption everyday between 20:00 and 06:00 from 30 Jun 2025 to 4 Jul 2025.
Lanes Closed: There will be two of three lanes closed.
Nearest town: 2.9m from Hungerford.
ROAD WORKS
Location: The M4 eastbound between junctions J14 (Hungerford)and J13 (Newbury) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 22:00 on 4 Jul 2025 to 06:00 on 5 Jul 2025.
Schedule: Expect disruption everyday between 22:00 and 06:00 from 7 Jul 2025 to 9 Jul 2025.
Lanes Closed: There will be two of three lanes closed.
Nearest town: 3.88m from Hungerford.
ROAD WORKS
Location: The M4 westbound between junctions J13 (Newbury)and J14 (Hungerford) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: Expect disruption everyday between 20:00 and 06:00 from 19 Jun 2025 to 21 Jun 2025.
Schedule: Expect disruption everyday between 20:00 and 06:00 from 23 Jun 2025 to 25 Jun 2025.
Lanes Closed: There will be two of three lanes closed.
Nearest town: 4.44m from Hungerford.

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 : J27 (High Cross) High Cross to J26 (Newport) Malpas : Incident : Accident : Lanes closed : Delays possible :,Start time: 12/06/2025 18:37 ,Expected end time:12/06/2025 20:37,Severity: Severe,Source: Welsh Government,Last updated: 12/06/2025 18:37
Nearest town: 1.53m from Bassaleg.

51.59--3.03

Description: M4 : Now clear : Westbound : J23A (Magor) Magor to J26 (Newport) Malpas,Start time: 12/06/2025 18:47 ,Expected end time:12/06/2025 18:52,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 18:47
Nearest town: 1.58m from Caerleon.

51.6--2.93

Description: M4 : Now clear : Westbound : J37 (Porthcawl) Pyle to J38 (Port Talbot) Margam,Start time: 12/06/2025 18:25 ,Expected end time:12/06/2025 18:30,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 18:25
Nearest town: 1.25m from Kenfig.

51.53--3.73

Description: M4 : Now clear : Eastbound : J45 (Swansea) Ynysforgan to J43 (Neath) Llandarcy,Start time: 12/06/2025 17:50 ,Expected end time:12/06/2025 17:55,Severity: Moderate,Source: Welsh Government,Last updated: 12/06/2025 17:50
Nearest town: 1.28m from Glais.

51.66--3.88

Description: M4 : Westbound : J37 (Porthcawl) Pyle to J39 Groes : Carriageway maintenance : Road closed : Diversions in place : 09/06/25-15/06/25 2000-0600 :,Start time: 09/06/2025 20:00 ,End Date:15/06/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 09/06/2025 20:00
Nearest town: 1.55m from Kenfig.

51.54--3.73

Description: M4 : Eastbound : J38 (Port Talbot) Margam to J37 (Porthcawl) Pyle : Carriageway maintenance : Road closed : Diversions in place : 09/06/25-15/06/25 2000-0600 :,Start time: 09/06/2025 20:00 ,End Date:15/06/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 09/06/2025 20:00
Nearest town: 1.25m from Kenfig.

51.53--3.73

Description: M4 : Now clear : Both directions : J43 (Neath) Llandarcy to J49 Pont Abraham,Start time: 12/06/2025 17:56 ,Expected end time:12/06/2025 18:01,Severity: Slight,Source: Welsh Government,Last updated: 12/06/2025 17:56
Nearest town: 1.87m from Felindre.

51.68--3.99

Description: M4 : Both directions : J43 (Neath) Llandarcy to J49 Pont Abraham : Delays possible :,Start time: 12/06/2025 17:00 ,Expected end time:12/06/2025 21:00,Severity: Slight,Source: Welsh Government,Last updated: 12/06/2025 17:00
Nearest town: 1.87m from Felindre.

51.68--3.99

Location: eastbound entry slip at junction J3 (Heathrow) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 2.5m from Heathrow.

51.49--0.41

Location: eastbound entry slip at junction J2 (N.Circular) .

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 0.98m from Ealing.

51.49--0.3

Location: eastbound between junctions J4and J3 (Heathrow) .

Lane Closures : Lane one will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : There will be one of four lanes closed.
Nearest town: 2.03m from Heathrow.

51.5--0.46

Location: eastbound entry slip at Heston Services.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 2.16m from Hounslow.

51.49--0.39

Location: eastbound exit slip at Heston Services.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 2.37m from Hounslow.

51.49--0.39

Location: eastbound exit slip at junction J2 (N.Circular) .

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 0.99m from Ealing.

51.49--0.3

Location: eastbound between junctions J3 (Heathrow)and J1 (London) .

Lane Closures : Lanes 1,2 and 3 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 22:00 and 05:30 from 19 June 2025 to 21 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 2.31m from Heathrow.

51.49--0.42

Location: eastbound between junctions J17 (Chippenham)and J16 (Swindon) .

Lane Closures : Lane one will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 21:00 on 19 June 2025 to 06:00 on 20 June 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 1.84m from Wootton Bassett.

51.56--1.91

Location: westbound between junctions J16 (Swindon)and J17 (Chippenham) .

Lane Closures : Lane one will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 21:00 on 19 June 2025 to 06:00 on 20 June 2025.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 2.12m from Wootton Bassett.

51.55--1.85

Location: westbound entry slip at junction J16 (Swindon) .

Lane Closures : Lane one will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 21:00 on 19 June 2025 to 06:00 on 20 June 2025.

Lanes Closed : There will be one of two lanes closed.
Nearest town: 2.09m from Wootton Bassett.

51.54--1.86

Location: eastbound entry slip at junction J11 (Basingstoke) .

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 21:00 on 19 June 2025 to 06:00 on 20 June 2025.

Lanes Closed : All lanes will be closed.
Nearest town: 1.9m from Reading.

51.41--0.97

Location: eastbound between junctions J14 (Hungerford)and J13 (Newbury) .

Due to: Roadworks scheme is planned.

Status : Pending.

Schedule : From 20:00 on 25 June 2025 to 06:00 on 9 July 2025.
Nearest town: 2.9m from Hungerford.

51.45--1.49

Location: eastbound between junctions J14 (Hungerford)and J13 (Newbury) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 20:00 and 06:00 from 25 June 2025 to 28 June 2025.

Schedule : Expect disruption everyday between 20:00 and 06:00 from 30 June 2025 to 4 July 2025.

Lanes Closed : There will be two of three lanes closed.
Nearest town: 2.9m from Hungerford.

51.45--1.49

Location: eastbound between junctions J14 (Hungerford)and J13 (Newbury) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 22:00 on 4 July 2025 to 06:00 on 5 July 2025.

Schedule : Expect disruption everyday between 22:00 and 06:00 from 7 July 2025 to 9 July 2025.

Lanes Closed : There will be two of three lanes closed.
Nearest town: 3.88m from Hungerford.

51.45--1.44

Location: westbound between junctions J13 (Newbury)and J14 (Hungerford) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : Expect disruption everyday between 20:00 and 06:00 from 19 June 2025 to 21 June 2025.

Schedule : Expect disruption everyday between 20:00 and 06:00 from 23 June 2025 to 25 June 2025.

Lanes Closed : There will be two of three lanes closed.
Nearest town: 4.44m from Hungerford.

51.45--1.43