M4 Traffic

M4 08:14am

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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:

RESURFACING
Location: The M4 westbound between junctions J15 (Swindon)and J16 (Swindon) .
Lane closures: The hard shoulder,lanes 1 and 2 are closed.
Reason: Emergency resurfacing.
Status: Currently Active.
Periodfrom 07:50 on 4 May 2026 to 12:00 on 4 May 2026.
Lanes closed: There are two of three lanes closed.
Nearest town: 1.29m from Swindon.
HIGHWAYS MANAGEMENT
Location: The M4 westbound between junctions J15 (Swindon)and J16 (Swindon) .
Lane closures: The hard shoulder,lanes 1 and 2 are closed.
Reason: Road Management.
Status: Currently Active.
Time to clear: The event is expected to clear between 10:00 and 10:15 on 4 May 2026.
Return to normal: Normal traffic conditions are expected between 09:45 and 10:00 on 4 May 2026.
Lanes closed: There are two of three lanes closed.
Nearest town: 1.26m from Swindon. CLEARED @ 07:49
BROKEN DOWN VEHICLE
Location: The M4 eastbound exit slip at junction J22 (Avonmouth) .
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 05:30 and 05:45 on 4 May 2026.
Return to normal: Normal traffic conditions are expected between 05:15 and 05:30 on 4 May 2026.
Lanes closed: There is one of two lanes closed.
Nearest town: 4.09m from Caldicot. CLEARED @ 04:40
ACCIDENT
Location: The M4 westbound between junctions J10 (Reading)and J11 (Basingstoke) .
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 05:30 and 05:45 on 4 May 2026.
Return to normal: Normal traffic conditions are expected between 05:30 and 05:45 on 4 May 2026.
Lanes closed: There is one of four lanes closed.
Nearest town: 2.56m from Reading. CLEARED @ 04:31
M4 ST JULIANS VIADUCT
Description: M4EastboundM4 St Julians Viaduct27/04/26-30/11/26 0600 :,Start time: 27/04/2026 6:00 ,End Date:30/11/2026 6:00,Severity: Moderate,Source: Welsh Government, Last updated: 27/04/2026 6:00
Nearest town: 1.08m from Caerleon. CLEARED @ 02:18


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.

ROAD WORKS
Location: The M4 eastbound between junctions J17 (Chippenham)and J16 (Swindon) .
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 07:00 on 11 May 2026 to 17:00 on 11 May 2026.
Nearest town: 3.46m from Wootton Bassett.
ROAD WORKS
Location: The M4 westbound between junctions J16 (Swindon)and J17 (Chippenham) .
Reason: Roadworks are planned.
Status: Pending.
Schedule: From 07:00 on 11 May 2026 to 17:00 on 11 May 2026.
Nearest town: 2.99m from Wootton Bassett.

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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Location: westbound between junctions J15 (Swindon)and J16 (Swindon) .

Lane Closures : The hard shoulder,lanes 1 and 2 are closed.

Due to: Emergency resurfacing.



Period : from 07:50 on 4 May 2026 to 12:00 on 4 May 2026.

Lanes Closed : There are two of three lanes closed.
Nearest town: 1.29m from Swindon.

51.53--1.77

Location: westbound between junctions J15 (Swindon)and J16 (Swindon) .

Lane Closures : The hard shoulder,lanes 1 and 2 are closed.

Due to: Road Management.



Time To Clear : The event is expected to clear between 10:00 and 10:15 on 4 May 2026.

Normal traffic conditions are expected between 09:45 and 10:00 on 4 May 2026.

Lanes Closed : There are two of three lanes closed.
Nearest town: 1.26m from Swindon.

51.53--1.77

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

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 05:30 and 05:45 on 4 May 2026.

Normal traffic conditions are expected between 05:15 and 05:30 on 4 May 2026.

Lanes Closed : There is one of two lanes closed.
Nearest town: 4.09m from Caldicot.

51.57--2.66

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

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 05:30 and 05:45 on 4 May 2026.

Normal traffic conditions are expected between 05:30 and 05:45 on 4 May 2026.

Lanes Closed : There is one of four lanes closed.
Nearest town: 2.56m from Reading.

51.41--0.95

Description: M4 : Eastbound : M4 St Julians Viaduct : 27/04/26-30/11/26 0600 :,Start time: 27/04/2026 6:00 ,End Date:30/11/2026 6:00,Severity: Moderate,Source: Welsh Government, Last updated: 27/04/2026 6:00
Nearest town: 1.08m from Caerleon.

51.6--2.98

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

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 07:00 on 11 May 2026 to 17:00 on 11 May 2026.
Nearest town: 3.46m from Wootton Bassett.

51.54--1.98

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

Due to: Roadworks are planned.

Status : Pending.

Schedule : From 07:00 on 11 May 2026 to 17:00 on 11 May 2026.
Nearest town: 2.99m from Wootton Bassett.

51.55--1.97