M4 Traffic

M4 12:44pm

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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:

WESTBOUND
Description: M4Now clearWestboundJ39 Groes to J41 (Port Talbot) Pentyla/Baglan,Start time: 22/10/2024 9:21 ,Expected end time:22/10/2024 9:26,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 9:21
Nearest town: 1.04m from Port Talbot. CLEARED @ 10:42
EASTBOUND
Description: M4Now clearEastboundJ33 (Cardiff) Capel Llanilltern,Start time: 22/10/2024 9:07 ,Expected end time:22/10/2024 9:12,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 9:07
Nearest town: 1.63m from Pentyrch. CLEARED @ 10:30
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 11:45 and 12:00 on 22 Oct 2024.
Return to normal: Normal traffic conditions are expected between 11:45 and 12:00 on 22 Oct 2024.
Lanes closed: There is one of three lanes closed.
Nearest town: 3.63m from Alveston. CLEARED @ 10:56
ACCIDENT
Location: The M4 eastbound between junctions J17 (Chippenham)and J16 (Swindon) .
Lane closures: The hard shoulder and lane 1 are closed.
Reason: Road traffic collision.
Status: Currently Active.
Time to clear: The event is expected to clear between 10:15 and 10:30 on 22 Oct 2024.
Return to normal: Normal traffic conditions are expected between 10:15 and 10:30 on 22 Oct 2024.
Lanes closed: There is one of three lanes closed.
Nearest town: 1.84m from Wootton Bassett. CLEARED @ 09:27
ACCIDENT
Location: The M4 eastbound between junctions J6 (Slough)and J5 (Colnbrook) .
Reason: Road traffic collision.
Status: Cleared.
Nearest town: 0.93m from Slough. CLEARED @ 09:18
ACCIDENT
Location: The M4 eastbound between junctions J5 (Colnbrook)and J4B (Heathrow) .
Lane closures: Lane one is closed.
Reason: Road traffic collision.
Status: Currently Active.
Time to clear: The event is expected to clear between 09:30 and 09:45 on 22 Oct 2024.
Return to normal: Normal traffic conditions are expected between 10:00 and 10:15 on 22 Oct 2024.
Lanes closed: There is one of five lanes closed.
Nearest town: 2.86m from Datchet. CLEARED @ 08:33
J33 CAPEL LLANILLTERN
Description: M4EastboundJ33 (Cardiff) Capel LlanillternCongestionoffslipDelay: s possible :,Start time: 22/10/2024 7:47 ,Expected end time:22/10/2024 9:47,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 7:47
Nearest town: 1.63m from Pentyrch. CLEARED @ 07:54
J27 HIGH CROSS TO J23A MAGOR
Description: M4EastboundJ27 (High Cross) High Cross to J23A (Magor) MagorCongestionDelay: s possible :,Start time: 22/10/2024 6:54 ,Expected end time:22/10/2024 10:53,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 6:54
Nearest town: 1.31m from Caerleon. CLEARED @ 07:06
CONGESTION
Location: The M4 westbound entry slip at junction J22 (Avonmouth) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 11:00 and 11:15 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 4.06m from Caldicot. CLEARED @ 11:06
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 09:45 and 10:00 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.2m from Hounslow. CLEARED @ 09:45
CONGESTION
Location: The M4 westbound exit slip at junction J19 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 09:15 and 09:30 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.08m from Bristol. CLEARED @ 09:18
CONGESTION
Location: The M4 eastbound exit slip at junction J18 (Bath) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 09:00 and 09:15 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 8.48m from Bath. CLEARED @ 09:00
CONGESTION
Location: The M4 eastbound exit slip at junction J12 (Reading) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 09:00 and 09:15 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.96m from Reading. CLEARED @ 09:09
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 09:15 and 09:30 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.2m from Hounslow. CLEARED @ 09:18
C39 GROES I G41 PENTYLA/BAGLAN
Disgrifiad: M4Tuar GorllewinC39 Groes i G41 Pentyla/BaglanTagfeyddOedin bosibl :,Amser y digwyddiad: 22/10/2024 8:38 ,Amser gorffen a ragwelir:22/10/2024 10:38,Difrifoldeb: Cymedrol,Ffynhonnell: Llywodraeth Cymru,Diweddarwyd ddiwethaf: 22/10/2024 8:38
Nearest town: 1.04m from Port Talbot. CLEARED @ 08:42
CONGESTION
Location: The M4 westbound exit slip at junction J19 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:30 and 08:45 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.08m from Bristol. CLEARED @ 08:42
CONGESTION
Location: The M4 eastbound at junction J6 (Slough) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 09:15 and 09:30 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Earlier Reason: Caused by an earlier accident.
Nearest town: 0.5m from Eton. CLEARED @ 09:18
CONGESTION
Location: The M4 eastbound exit slip at junction J18 (Bath) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:30 and 08:45 on 22 Oct 2024.
Nearest town: 8.48m from Bath. CLEARED @ 08:33
CONGESTION
Location: The M4 eastbound at junction J3 (Heathrow) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 08:45 and 09:00 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.45m from Heathrow. CLEARED @ 08:24
CONGESTION
Location: The M4 eastbound at junction J20 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 09:15 and 09:30 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.7m from Alveston. CLEARED @ 08:51
CONGESTION
Location: The M4 eastbound exit slip at junction J18 (Bath) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 07:45 and 08:00 on 22 Oct 2024.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 8.48m from Bath. CLEARED @ 07:48


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 westbound between junctions J4and J4B (Heathrow) .
Lane closures: Lane one will be closed.
Reason: Emergency barrier repairs are planned.
Status: Pending.
Schedule: From 22:00 on 22 Oct 2024 to 05:00 on 23 Oct 2024.
Lanes Closed: There will be one of five lanes closed.
Nearest town: 2.08m from Heathrow.
ROAD WORKS
Location: The M4 eastbound at junction J4B (Heathrow) .
Lane closures: Lane one will be closed.
Reason: Emergency barrier repairs are planned.
Status: Pending.
Schedule: From 22:00 on 22 Oct 2024 to 05:00 on 23 Oct 2024.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 3.02m from Heathrow.
ROAD WORKS
Location: The M4 eastbound between junctions J5 (Colnbrook)and J4B (Heathrow) .
Lane closures: Lane one will be closed.
Reason: Emergency barrier repairs are planned.
Status: Pending.
Schedule: From 22:00 on 22 Oct 2024 to 05:00 on 23 Oct 2024.
Lanes Closed: There will be one of five lanes closed.
Nearest town: 2.23m from Slough.
ROAD WORKS
Location: The M4 westbound at junction J4B (Heathrow) .
Lane closures: Lane one will be closed.
Reason: Emergency barrier repairs are planned.
Status: Pending.
Schedule: From 22:00 on 22 Oct 2024 to 05:00 on 23 Oct 2024.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 2.35m from Heathrow.
ROAD WORKS
Location: The M4 westbound between junctions J12 (Reading)and J13 (Newbury) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 24 Oct 2024 to 06:00 on 25 Oct 2024.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 2.7m from Chieveley.
ROAD WORKS
Location: The M4 eastbound between junctions J13 (Newbury)and J12 (Reading) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 24 Oct 2024 to 06:00 on 25 Oct 2024.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 2.18m from Chieveley.

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 : Now clear : Westbound : J39 Groes to J41 (Port Talbot) Pentyla/Baglan,Start time: 22/10/2024 9:21 ,Expected end time:22/10/2024 9:26,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 9:21
Nearest town: 1.04m from Port Talbot.

51.59--3.77

Description: M4 : Now clear : Eastbound : J33 (Cardiff) Capel Llanilltern,Start time: 22/10/2024 9:07 ,Expected end time:22/10/2024 9:12,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 9:07
Nearest town: 1.63m from Pentyrch.

51.51--3.31

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 11:45 and 12:00 on 22 October 2024.

Normal traffic conditions are expected between 11:45 and 12:00 on 22 October 2024.

Lanes Closed : There is one of three lanes closed.
Nearest town: 3.63m from Alveston.

51.54--2.54

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

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

Due to: Road traffic collision.



Time To Clear : The event is expected to clear between 10:15 and 10:30 on 22 October 2024.

Normal traffic conditions are expected between 10:15 and 10:30 on 22 October 2024.

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

51.56--1.91

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

Due to: Road traffic collision.

Status : Cleared.
Nearest town: 0.93m from Slough.

51.49--0.57

Location: eastbound between junctions J5 (Colnbrook)and J4B (Heathrow) .

Lane Closures : Lane one is closed.

Due to: Road traffic collision.



Time To Clear : The event is expected to clear between 09:30 and 09:45 on 22 October 2024.

Normal traffic conditions are expected between 10:00 and 10:15 on 22 October 2024.

Lanes Closed : There is one of five lanes closed.
Nearest town: 2.86m from Datchet.

51.49--0.52

Description: M4 : Eastbound : J33 (Cardiff) Capel Llanilltern : Congestion : offslip : Delays possible :,Start time: 22/10/2024 7:47 ,Expected end time:22/10/2024 9:47,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 7:47
Nearest town: 1.63m from Pentyrch.

51.51--3.31

Description: M4 : Eastbound : J27 (High Cross) High Cross to J23A (Magor) Magor : Congestion : Delays possible :,Start time: 22/10/2024 6:54 ,Expected end time:22/10/2024 10:53,Severity: Moderate,Source: Welsh Government,Last updated: 22/10/2024 6:54
Nearest town: 1.31m from Caerleon.

51.6--2.95

Location: westbound entry slip at junction J22 (Avonmouth) .

Due to: Congestion.



Normal traffic conditions are expected between 11:00 and 11:15 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 4.06m from Caldicot.

51.57--2.66

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

Due to: Congestion.



Normal traffic conditions are expected between 09:45 and 10:00 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.2m from Hounslow.

51.49--0.39

Location: westbound exit slip at junction J19 (Bristol) .

Due to: Congestion.



Normal traffic conditions are expected between 09:15 and 09:30 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.08m from Bristol.

51.51--2.52

Location: eastbound exit slip at junction J18 (Bath) .

Due to: Congestion.



Normal traffic conditions are expected between 09:00 and 09:15 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 8.48m from Bath.

51.5--2.36

Location: eastbound exit slip at junction J12 (Reading) .

Due to: Congestion.



Normal traffic conditions are expected between 09:00 and 09:15 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.96m from Reading.

51.44--1.07

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

Due to: Congestion.



Normal traffic conditions are expected between 09:15 and 09:30 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.2m from Hounslow.

51.49--0.39

Disgrifiad: M4 : Tuar Gorllewin : C39 Groes i G41 Pentyla/Baglan : Tagfeydd : Oedin bosibl :,Amser y digwyddiad: 22/10/2024 8:38 ,Amser gorffen a ragwelir:22/10/2024 10:38,Difrifoldeb: Cymedrol,Ffynhonnell: Llywodraeth Cymru,Diweddarwyd ddiwethaf: 22/10/2024 8:38
Nearest town: 1.04m from Port Talbot.

51.59--3.77

Location: westbound exit slip at junction J19 (Bristol) .

Due to: Congestion.



Normal traffic conditions are expected between 08:30 and 08:45 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.08m from Bristol.

51.51--2.52

Location: eastbound at junction J6 (Slough) .

Due to: Congestion.



Normal traffic conditions are expected between 09:15 and 09:30 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.

Earlier Due to: Caused by an earlier accident.
Nearest town: 0.5m from Eton.

51.5--0.61

Location: eastbound exit slip at junction J18 (Bath) .

Due to: Congestion.



Normal traffic conditions are expected between 08:30 and 08:45 on 22 October 2024.
Nearest town: 8.48m from Bath.

51.5--2.36

Location: eastbound at junction J3 (Heathrow) .

Due to: Congestion.



Normal traffic conditions are expected between 08:45 and 09:00 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.45m from Heathrow.

51.49--0.41

Location: eastbound at junction J20 (Bristol) .

Due to: Congestion.



Normal traffic conditions are expected between 09:15 and 09:30 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 2.7m from Alveston.

51.55--2.55

Location: eastbound exit slip at junction J18 (Bath) .

Due to: Congestion.



Normal traffic conditions are expected between 07:45 and 08:00 on 22 October 2024.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 8.48m from Bath.

51.5--2.36

Location: westbound between junctions J4and J4B (Heathrow) .

Lane Closures : Lane one will be closed.

Due to: Emergency barrier repairs are planned.

Status : Pending.

Schedule : From 22:00 on 22 October 2024 to 05:00 on 23 October 2024.

Lanes Closed : There will be one of five lanes closed.
Nearest town: 2.08m from Heathrow.

51.5--0.46

Location: eastbound at junction J4B (Heathrow) .

Lane Closures : Lane one will be closed.

Due to: Emergency barrier repairs are planned.

Status : Pending.

Schedule : From 22:00 on 22 October 2024 to 05:00 on 23 October 2024.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 3.02m from Heathrow.

51.49--0.5

Location: eastbound between junctions J5 (Colnbrook)and J4B (Heathrow) .

Lane Closures : Lane one will be closed.

Due to: Emergency barrier repairs are planned.

Status : Pending.

Schedule : From 22:00 on 22 October 2024 to 05:00 on 23 October 2024.

Lanes Closed : There will be one of five lanes closed.
Nearest town: 2.23m from Slough.

51.49--0.53

Location: westbound at junction J4B (Heathrow) .

Lane Closures : Lane one will be closed.

Due to: Emergency barrier repairs are planned.

Status : Pending.

Schedule : From 22:00 on 22 October 2024 to 05:00 on 23 October 2024.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 2.35m from Heathrow.

51.49--0.48

Location: westbound between junctions J12 (Reading)and J13 (Newbury) .

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 24 October 2024 to 06:00 on 25 October 2024.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 2.7m from Chieveley.

51.46--1.26

Location: eastbound between junctions J13 (Newbury)and J12 (Reading) .

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 24 October 2024 to 06:00 on 25 October 2024.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 2.18m from Chieveley.

51.47--1.27