M4 Traffic

M4 23:54pm

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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:

WESTBOUND
Description: M4Now clearWestboundJ23A (Magor) Magor to J26 (Newport) Malpas,Start time: 18/06/2026 20:30 ,Expected end time:18/06/2026 19:26,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 20:30
Nearest town: 1.58m from Caerleon. CLEARED @ 20:42
VEHICLE FIRE
Location: The M4 westbound between junctions J8 (High Wycombe)and J10 (Reading) .
Lane closures: The hard shoulder and lane 1 are closed.
Reason: Vehicle fire.
Status: Currently Active.
Time to clear: The event is expected to clear between 21:00 and 21:15 on 18 Jun 2026.
Return to normal: Normal traffic conditions are expected between 21:00 and 21:15 on 18 Jun 2026.
Lanes closed: There is one of four lanes closed.
Nearest town: 2.06m from Bray. CLEARED @ 20:43
CONGESTION
Location: The M4 westbound at junction J19 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 23:15 and 23:30 on 18 Jun 2026.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.18m from Bristol. CLEARED @ 23:25
CONGESTION
Location: The M4 eastbound exit slip at junction J22 (Avonmouth) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 19:30 and 19:45 on 18 Jun 2026.
Nearest town: 4.05m from Caldicot. CLEARED @ 19:13


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 exit slip at junction J4B (Heathrow) .
Reason: Roadworks.
Status: Currently Active.
Period: from 22:18 on 18 Jun 2026 to 05:30 on 19 Jun 2026.
Lanes Closed: All lanes are closed.
Nearest town: 2.47m from Heathrow.
ROAD WORKS
Location: The M4 westbound between junctions J19 (Bristol)and J20 (Bristol) .
Reason: Roadworks.
Status: Currently Active.
Period: from 21:10 on 18 Jun 2026 to 06:00 on 19 Jun 2026.
Lanes Closed: All lanes are closed.
Nearest town: 4.86m from Alveston.
ROAD WORKS
Location: The M4 eastbound between junctions J18 (Bath)and J17 (Chippenham) .
Lane closures: Lane one will be closed.
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 21:00 on 25 Jun 2026 to 06:00 on 26 Jun 2026.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 3.76m from Chippenham.

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 : Now clear : Westbound : J23A (Magor) Magor to J26 (Newport) Malpas,Start time: 18/06/2026 20:30 ,Expected end time:18/06/2026 19:26,Severity: Moderate,Source: Welsh Government,Last updated: 18/06/2026 20:30
Nearest town: 1.58m from Caerleon.

51.6--2.93

Location: westbound between junctions J8 (High Wycombe)and J10 (Reading) .

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

Due to: Vehicle fire.



Time To Clear : The event is expected to clear between 21:00 and 21:15 on 18 June 2026.

Normal traffic conditions are expected between 21:00 and 21:15 on 18 June 2026.

Lanes Closed : There is one of four lanes closed.
Nearest town: 2.06m from Bray.

51.49--0.75

Location: westbound at junction J19 (Bristol) .

Due to: Congestion.



Normal traffic conditions are expected between 23:15 and 23:30 on 18 June 2026.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 5.18m from Bristol.

51.51--2.52

Location: eastbound exit slip at junction J22 (Avonmouth) .

Due to: Congestion.



Normal traffic conditions are expected between 19:30 and 19:45 on 18 June 2026.
Nearest town: 4.05m from Caldicot.

51.57--2.66

Location: westbound exit slip at junction J4B (Heathrow) .

Due to: Roadworks.



Period : from 22:18 on 18 June 2026 to 05:30 on 19 June 2026.

Lanes Closed : All lanes are closed.
Nearest town: 2.47m from Heathrow.

51.49--0.49

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

Due to: Roadworks.



Period : from 21:10 on 18 June 2026 to 06:00 on 19 June 2026.

Lanes Closed : All lanes are closed.
Nearest town: 4.86m from Alveston.

51.52--2.52

Location: eastbound between junctions J18 (Bath)and J17 (Chippenham) .

Lane Closures : Lane one will be closed.

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 21:00 on 25 June 2026 to 06:00 on 26 June 2026.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 3.76m from Chippenham.

51.51--2.16