M4 Traffic

M4 12:24pm

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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 between junctions J20 (Bristol)and J19 (Bristol) .
Lane closures: The hard shoulder is closed.
Reason: Broken down vehicle.
Status: Currently Active.
Time to clear: The event is expected to clear between 09:30 and 09:45 on 28 May 2025.
Return to normal: Normal traffic conditions are expected between 09:30 and 09:45 on 28 May 2025.
Nearest town: 3.79m from Alveston. CLEARED @ 09:00

EASTBOUND

Description: M4Now clearEastboundJ33 (Cardiff) Capel Llanilltern,Start time: 28/05/2025 8:32 ,Expected end time:28/05/2025 8:37,Severity: Moderate,Source: Welsh Government,Last updated: 28/05/2025 8:32
Nearest town: 1.63m from Pentyrch. CLEARED @ 08:55

BROKEN DOWN VEHICLE

Location: The M4 westbound between junctions J5 (Colnbrook)and J6 (Slough) .
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 10:00 and 10:15 on 28 May 2025.
Return to normal: Normal traffic conditions are expected between 10:00 and 10:15 on 28 May 2025.
Lanes closed: There is one of four lanes closed.
Nearest town: 0.38m from Eton. CLEARED @ 09:27

J33 CAPEL LLANILLTERN

Description: M4EastboundJ33 (Cardiff) Capel LlanillternCongestionoffslipDelay: s possible :,Start time: 28/05/2025 7:28 ,Expected end time:28/05/2025 9:28,Severity: Moderate,Source: Welsh Government,Last updated: 28/05/2025 7:28
Nearest town: 1.63m from Pentyrch. CLEARED @ 07:43

BROKEN DOWN VEHICLE

Location: The M4 eastbound between junctions J11 (Basingstoke)and J10 (Reading) .
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 07:30 and 07:45 on 28 May 2025.
Return to normal: Normal traffic conditions are expected between 07:30 and 07:45 on 28 May 2025.
Lanes closed: There is one of four lanes closed.
Nearest town: 5.25m from Finchampstead. CLEARED @ 06:45

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: 27/05/2025 20:00
Nearest town: 0.88m from Lisvane.

J36 SARN

Description: M4WestboundJ36 (Bridgend) SarnCarriageway maintenance: Diversions in place29/05/25-30/05/25 2000-0600Onslip closed :,Start time: 29/05/2025 20:00 ,End Date:30/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 27/05/2025 12:51
Nearest town: 1.91m from Bridgend.

CONGESTION

Location: The M4 westbound between junctions J5 (Colnbrook)and J6 (Slough) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:45 and 09:00 on 28 May 2025.
CauseBroken down vehicle.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.58m from Slough. CLEARED @ 08:51

CONGESTION

Location: The M4 eastbound between junctions J3 (Heathrow)and J2 (N.Circular) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:30 and 08:45 on 28 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.83m from Hounslow. CLEARED @ 08:33

CONGESTION

Location: The M4 eastbound between junctions J3 (Heathrow)and J2 (N.Circular) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:15 and 08:30 on 28 May 2025.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.83m from Hounslow. CLEARED @ 08:24

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

Lane Closures : The hard shoulder is closed.

Due to: Broken down vehicle.

Time To Clear : The event is expected to clear between 09:30 and 09:45 on 28 May 2025.

Normal traffic conditions are expected between 09:30 and 09:45 on 28 May 2025.
Nearest town: 3.79m from Alveston.

51.53--2.54

Description: M4 : Now clear : Eastbound : J33 (Cardiff) Capel Llanilltern,Start time: 28/05/2025 8:32 ,Expected end time:28/05/2025 8:37,Severity: Moderate,Source: Welsh Government,Last updated: 28/05/2025 8:32
Nearest town: 1.63m from Pentyrch.

51.51--3.31

Location: westbound between junctions J5 (Colnbrook)and J6 (Slough) .

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 10:00 and 10:15 on 28 May 2025.

Normal traffic conditions are expected between 10:00 and 10:15 on 28 May 2025.

Lanes Closed : There is one of four lanes closed.
Nearest town: 0.38m from Eton.

51.5--0.61

Description: M4 : Eastbound : J33 (Cardiff) Capel Llanilltern : Congestion : offslip : Delays possible :,Start time: 28/05/2025 7:28 ,Expected end time:28/05/2025 9:28,Severity: Moderate,Source: Welsh Government,Last updated: 28/05/2025 7:28
Nearest town: 1.63m from Pentyrch.

51.51--3.31

Location: eastbound between junctions J11 (Basingstoke)and J10 (Reading) .

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 07:30 and 07:45 on 28 May 2025.

Normal traffic conditions are expected between 07:30 and 07:45 on 28 May 2025.

Lanes Closed : There is one of four lanes closed.
Nearest town: 5.25m from Finchampstead.

51.42--0.88

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: 27/05/2025 20:00
Nearest town: 0.88m from Lisvane.

51.55--3.19

Description: M4 : Westbound : J36 (Bridgend) Sarn : Carriageway maintenance : : Diversions in place : 29/05/25-30/05/25 2000-0600 : Onslip closed :,Start time: 29/05/2025 20:00 ,End Date:30/05/2025 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 27/05/2025 12:51
Nearest town: 1.91m from Bridgend.

51.53--3.58

Location: westbound between junctions J5 (Colnbrook)and J6 (Slough) .

Due to: Congestion.

Normal traffic conditions are expected between 08:45 and 09:00 on 28 May 2025.

Cause : Broken down vehicle.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 0.58m from Slough.

51.49--0.58

Location: eastbound between junctions J3 (Heathrow)and J2 (N.Circular) .

Due to: Congestion.

Normal traffic conditions are expected between 08:30 and 08:45 on 28 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.83m from Hounslow.

51.49--0.36

Location: eastbound between junctions J3 (Heathrow)and J2 (N.Circular) .

Due to: Congestion.

Normal traffic conditions are expected between 08:15 and 08:30 on 28 May 2025.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 1.83m from Hounslow.

51.49--0.36

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