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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:

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.

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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Live Email Traffic Alerts

Get live email alerts whenever there is a traffic incident or roadworks on the M4 that may cause congestion or jams.

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:

Official source of traffic updates.

Transport for London's (TfL) portal for transportation in London.

The Welsh government's traffic information service for Wales.

Live traffic conditions and news for Scotland's road network.

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• Tips & advice

Latest live M4 traffic news

Live m4 traffic news and updates for m4 junctions, plus real time travel reports on delays, accidents, roadworks and snow.

The M4 is the main road running between London and South Wales, passing via Slough, Reading, Swindon, Bristol, Newport, Cardiff and Swansea along the way. Much like the rest of the UK’s road network, the M4 has its areas most likely to cause tail backs – primarily where it joins the M25 on the west of London and also where it meets the M5 near Bristol. Naturally, accidents, roadworks and other traffic issues cause delays, so it pays to be on top of your journey before you start your engine.

There used to be a toll road charge to cross the M4 Severn bridge that joins England and Wales, but after 52 years, the charge was scrapped on December 17th 2018.

Generally the majority of the M4 tends to stay relatively clear, but the 189-mile route can see extra congestion during rush hour and summer holidays. If you’re planning to use any section of the M4 motorway, this page will be a useful aid for travel alerts, live updates and an incident map for both westbound and eastbound lanes.

Scroll down to find live tweets on the latest traffic conditions on the M4.  

M4 live motorway cameras

If there is traffic disruption on the M4 you can keep up to date on any delays with live traffic cameras for the eastbound and westbound M4.

M4 weather report

Details of the latest weather warnings in the M5 area from the Met Office...

• Met Office South West weather report

The history of the M4 

The Ministry of Transport first proposed a new road from London to South Wales in the 1930s. Plans for the M4 as one of the first major post-war trunk roads were produced in 1956 and construction began in 1961. The Chiswick flyover, a short section of elevated dual-carriageway built to reduce the impact of traffic travelling between central London and the west, opened in 1959 and later became part of the new M4 route. The section from J18 to the west of Newport was opened in 1966, including the Severn Bridge, which is now part of the M48.

The English section of the motorway was completed in December 1971 when the 50-mile stretch between Maidenhead and Swindon was opened for public use. The Welsh section was finished in 1993, when the Briton Ferry bridge opened. The Second Severn Crossing opened in 1996, and motorways on either side of the river carried the M4 over the new crossing when construction was finally completed. 

•  M5 traffic: live news updates

M4 junctions

All of the M4 junctions on the southbound and northbound carriageways are detailed below... 

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HELP! Please sign our petition to reinstate the live CCTV traffic camera feeds for the M4

As most of you will have already seen, back in December, National Highways, the government body who control and operate the CCTV cameras on the M4 (and the rest of England) restricted access to their feeds, freezing the images on that date and not allowing third parties like us to give you the access to the latest traffic images you previously enjoyed.

We've been working hard to get this access restored but have unfortunately met with nothing but bureaucratic red tape and a response of "no, because we said so" from National Highways.

Road users in Scotland and Wales don't have this problem; their government bodies put the needs of the public first and have created ways for third-party providers to build fast, helpful services, now used by thousands of UK motorists daily.

The more people that sign, the quicker this can be resolved, so please share!

We have been told by National Highways that the camera feeds for the M4 in England will be reinstated shortly. Please check back.

If the images are not updating, please check back later.

Enter a custom name for this camera if required, then click the route you wish to save it to.

Enter a custom name for this Bookmark, or just click save to keep it as it is.

Are you sure you wish to remove this camera from ALL routes? If you only wish to remove this camera from a specific route please Cancel, go to the Route in question and remove it from there.

Latest CCTV traffic image from camera #1282 on the M4 road.

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M4 traffic live: Major bridge crash to cause disruption into a third day

The traffic situation has been made worse by closures of M48 Severn Bridge due to high winds

• Updated 14:21, 28 DEC 2023

The M4 Prince of Wales Bridge was brought to standstill on Wednesday and the impact of a seven-vehicle crash is set to be felt into Friday (December 29). Overnight repairs are needed following the incident and they are due to begin on Thursday at 9pm and last until 6am tomorrow.

We will bring you updates below as and when we get them.

• Emergency repairs to last from Thursday night into Friday morning 14:21
• Free-flowing traffic 21:27
• Latest update from National Highways South-West 16:48
• Latest map of congestion 16:44
• More details on incident and repairs needed 15:29

Emergency repairs to last from Thursday night into Friday morning

Details of the emergency repairs here

Thursday morning update - lane still closed

This from Inrix:

One lane closed due to emergency barrier repairs on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Lane three (of three) is now closed for repairs following an accident that occurred around midday [Wednesday].

Free-flowing traffic

The M48 Severn Bridge remains closed and one lane is still closed on the M4 Prince of Wales Bridge but traffic on the M4, M5 and M49 is now largely free-flowing.

M4 and M48 traffic update

M4 PRINCE OF WALES BRIDGE - MONMOUTHSHIRE - WESTBOUND - BRISTOL

One lane closed due to emergency barrier repairs and earlier accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Lane three (of three) is now closed.

M48 SEVERN BRIDGE - GLOUCESTERSHIRE - BOTH DIRECTIONS - MONMOUTHSHIRE

M48 Severn Bridge in both directions closed due to strong winds between J2 A466 Wye Valley Link Road (Chepstow) and J1 A403 (Aust). Diversion - M4 Prince of Wales Bridge.

Long delays and one lane closed due to emergency barrier repairs and earlier accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Lane three (of three) is now closed.

Lane closed for repairs

Long delays and one lane closed due to emergency barrier repairs and earlier accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Congestion to almost J18 (Bath), along the M5 Northbound from J20 ( Clevedon ), the M49 is also bad. Lane three (of three) is now closed.

Gridlock on the M5

There is very slow-moving traffic on the M5 between junctions 17 and 18, both southbound and northbound.

Latest update from National Highways South-West

Latest map of congestion.

The below map from National Highways shows the closure of the M48 Severn Bridge and the congestion stemming from the diversion over the M4 Prince of Wales Bridge, as well as traffic problems on the M5.

All M4 Prince of Wales Bridge lanes reopen - but delays remain

Latest from Inrix

Severe delays due to earlier accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Congestion to well before J19 (M32 interchange), along the M5 from the Avonmouth Bridge at J18, the M49 is solid and the Eastbound side of the M4 is backed up from J27. All lanes have been re-opened. Camera's show all lanes are now open following a 40 minute block.

More details on incident and repairs needed

This is the latest alert for drivers from National Highways

There are severe delays of 90 minutes above usual journey times on the M4 westbound between J19 and J23 on the approach to the Prince of Wales Bridge where 1 lane is currently closed. A multiple vehicle collision took place at approximately 2pm, which has caused significant damage to the central reservation which requires repair prior to all lanes being reopened. Emergency roadworks to repair the central reservation have been suspended due to severe weather conditions at the scene, preventing the necessary equipment being safely used. Please note the M48 Severn Bridge is currently closed due to strong winds. If this incident impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey.

M4 Prince of Wales Bridge crash involved seven vehicles

This just in from National Highways:

Drivers travelling to South Wales on the M4 are advised to expect delays following a serious, police-led incident on the Prince of Wales Bridge this lunchtime. The bridge has one lane closed westbound between junctions 22 and 23 following the incident involving seven vehicles. All lanes are now open eastbound. A 50mph speed limit is in place on the bridge to ensure safety as a 30-metre section of central reservation barrier has been damaged and will need replacing when weather conditions improve. The M48 Severn Bridge is also closed in both directions due to high winds and is not expected to reopen until later in the day. Drivers are advised to use the M50, A40 or Prince of Wales Bridge as an alternative.

A417 update

Long delays and traffic heavier than normal on A417 Northbound at Air Balloon Roundabout. Traffic not helped by an earlier crash on the A436 near the roundabout.

One lane still closed

Cameras show that lane one and two (of three) have now reopened after the road was blocked for around 40 minutes. The eastbound side is now fully open but severe delays remain and isn't helped by the M48 Severn Bridge closure.

M4 traffic latest

This from National Highways

Location The M4 westbound between junctions J22 and J23

Reason Accident involving a vehicle crossing the central reservation

Status Currently Active

Time To Clear The event is expected to clear between 16:15 and 16:30 on 27 December 2023

Return To Normal Normal traffic conditions are expected between 16:00 and 16:15 on 27 December 2023

What happened in the M4 Prince of Wales Bridge crash

The incident nvolved a vehicle crossing the central reservation

M4 hit by 60 minute delays with emergency services in attendance

This travel alert from National Highways

There are long delays of 60 minutes on the M4 Prince of Wales Bridge in both directions between J21 Awkley Interchange (Chepstow M48) and J23A Magor Interchange (Magor, Caldicot A4810). 1 lane is currently open west bound and 2 lanes are open eastbound. Gwent Police and National Highways Traffic Officers are currently in attendance. At present the M48 Severn Bridge cannot be used as an alternative route as it is currently closed due to strong winds.

A417 update from Gloucestershire

Queueing traffic on A417 Northbound from Birdlip down hill to A436 Air Balloon Roundabout. Travel time is ten minutes.

Lanes remain closed but M4 Severn Bridge reopens

Here's the latest:

• Severe delays and two lanes closed due to accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48.
• Congestion to just before J21 (M48 interchange) and for a few miles on the M49 approaching the M4 interchange for westbound traffic.
• Traffic is also severely congested back to J24 ( Coldra ) for eastbound traffic.
• Cameras show that lane one (of three) has now reopened after the road was blocked for around 40 minutes.
• The eastbound side is now fully open but severe delays remain and isn't helped by the M48 Severn Bridge closure.

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M4 severn bridge update.

M4 Prince of Wales Bridge Westbound blocked, severe delays due to accident between J22 M49 and J23 M48.

Delays aren't helped due to the closure of the M48 Severn Bridge as traffic diverts along the M4 Prince of Wales Bridge.

Lanes two and three (of three) are closed on the opposite side.

The M48 Severn Bridge in Gloucestershire is currently closed in both directions between J1 (Aust) and J2 (Chepstow) due to strong winds. Traffic should use the M4 Prince of Wales Bridge as an alternate route. Our South West Regional Operations Centre are monitoring the wind speeds and will reopen the road as soon as wind speeds reduce to a safe level. If this closure impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey.

Obviously, the M4 is affected by the collision westbound

Traffic cameras show delays on M4

M4 and M48 traffic roundup

M48 Severn Bridge in both directions closed due to strong winds between J2 A466 Wye Valley Link Road (Chepstow) and J1 A403 (Aust).

All traffic being temporarily held and severe delays due to accident on M4 Prince of Wales Bridge Westbound between J22 M49 and J23 M48. Delays aren't helped due to the closure of the M48 Severn Bridge as traffic diverts along the M4 Prince of Wales Bridge.

M4 - WILTSHIRE - WESTBOUND

Long delays due to accident, now on the hard shoulder on M4 Westbound near J16 A3102 Swindon Road (Swindon West). All lanes have been re-opened. Traffic was held around 12:20 until 12:30, affecting traffic eastbound as traffic looks over.

M4 traffic update

Map of m4 delays.

• West Country
• Traffic & Travel
• Most Recent

• NSW & ACT

Man critical condition after crashing into guard rail, with traffic on Sydney’s M4 brought to a halt

A serious crash has brought traffic to a halt, with a motorcyclist left in critical condition.

Reality star’s win after drug downfall

‘Significant concerns’: Massive call on CFMEU

Skier’s fall ‘instantly fatal’, inquest told

A serious crash brought traffic to a halt on a busy Sydney motorway.

Emergency services were called to a crash on the M4 Motorway at the Prospect Highway Off-Ramp in Sydney about 8am on Monday, with two of the three westbound lanes closed according to Live Traffic NSW.

A NSW Ambulance spokesperson confirmed paramedics and a rescue helicopter were called to the scene, with a NSW Police spokesperson confirming a motorcyclist had crashed into a guard rail.

A 27-year-old man was treated by paramedics on the scene and is being transported to Westmead Hospital in a critical condition.

An investigation has been launched into the circumstances surrounding the crash, and a nyone with information or dashcam footage is urged to call police.

Traffic was built-up for about an hour while emergency services cleared the road. It has since reopened.

The traffic chaos comes as a spate of light rail strikes are planned across Sydney this week, with the Rail, Tram and Bus Union (RTBU) poised to carry out two-hour stoppages between 8am and 10am, and 4pm and 6pm Monday to Friday.

The action comes after failed negotiations between the RTBU and operator Transdev, with RTBU secretary David Babineau claiming staff were meant to receive a pay rise schedule from Transdev, but “what (they’ve) been given is worse off than the previous offer”.

“Workers are just after the pay and conditions they deserve. It’s disappointing the company has forced us back to taking protected industrial action and impacting commuters,” he said.

“We have tried to limit the inconvenience to those peak times to ensure people can get safely to where they need to outside of those hours, for example late at night.

“It’s clear these huge companies aren’t feeling the cost-of-living pinch like our workers are, otherwise they wouldn’t be dragging out this bargaining period.”

A Transdev spokesperson thanked customers for their patience as they work to resolve their new Enterprise Agreement.

More Coverage

“We are working hard with transport partners to minimise impact to customers caused by this industrial action,” the spokesperson said.

“Customers should plan ahead and consider alternate transport options during the disruption period or, if possible, avoid non-essential travel on the trams.

“We will have as many personnel as possible on the ground to help manage the disruptions. Testing activities for Parramatta Light Rail will continue.”

A troubled former reality TV star has scored a win in court after she was busted driving while under the influence of drugs.

A leading state opposition figure has written to the corruption watchdog amid calls to investigate the CFMEU.

A backcountry skier who died during a suspected fall in the Kosciuszko National Park would have been killed instantly, an inquest has been told.

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Live M4 traffic updates as three people rushed to hospital after car crash closes major road as drivers forced to divert via M25 for Heathrow Airport

The nature of the accident is not yet known as travel to the Airport has been affected

• Updated 14:40, 13 JUL 2023

The M4 Heathrow Spur Road is currently closed due to an accident earlier today (July 13). The accident is said to involve three cars.

It remains unknown whether anyone has been injured. We will bring you the latest updates as they come.

Traffic and travel website Inrix currently reads: "M4 Heathrow Spur Road inbound closed, long delays due to recovery work and accident, three cars involved from main M4 carriageway J4 (Heathrow / Uxbridge) to the Airport.

"A crash at 08:40, all stopped just before 09:00 before the roundabout. Trapped traffic has been turned around and sent back. Diversion - traffic should travel to Heathrow via the M25 J14. Affects bus route A10."

National Highways said: "The M4 Heathrow airport spur, Junction 4 to Junction 4A is closed following a 3 car collision. Met Police, Fire and Rescue and Ambulance services are in attendance.

"Traffic heading for Heathrow airport are advised to use M25 Junction 14. Delays are likely on approach to the closure and diversion routes.

"If this closure impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey."

MyLondon has contacted the London Ambulance Service and Metropolitan Police for comment.

This is a breaking news story, follow our live blog below for all the latest updates. More to follow.

Are you stuck in the delays with photos or information? Please either tweet at @RafiMauro1, or email [email protected]

• LAS statement 11:03

Met Police statement

A Met Police spokesperon said: "Shortly after 08:50hrs on Thursday, 13 July officers responded to a three-vehicle collision on the M4 Spur, near to junction 4. The road was closed for a time while emergency services attended the scene. "Two people were taken to hospital- we await an update on their conditions. Another person was taken to hospital with a serious injury, their condition is not believed to be life-threatening."

Airport recommend alternative routes to Terminals 2 and 3

A Heathrow spokesperson said: “Our teams are supporting emergency services as they respond to a road traffic accident on the M4 spur leading to Terminals 2 and 3. We recommend passengers driving to these terminals take alternative routes to either Terminals 4 and 5 and then continue by free public transport to Terminals 2 and 3."

LAS statement

An LAS spokesperson said: "We were called today (13 July) at 8:36am to reports of a road traffic collision between four cars near London Heathrow Airport. “We sent a number of resources to the scene, including two ambulance crews, an incident response officer, two medics in fast-response cars, and members of our Hazardous Area Response Team (HART). The incident is ongoing.”

Traffic sent back

Inrix says 'trapped traffic has been turned around and sent back.' It comes after a three car pile-up has halted traffic on the M4 by Heathrow. It is blocked inbound.

Where did the accident happen?

It happened on the M4 inbound. We don't know if there have been any injuries or fatalities yet. Stay with us for further updates.

What we know so far

Good morning and welcome to our live blog.

• The M4 Heathrow Spur Road is currently closed due to an accident earlier today (July 13).
• The accident is said to involve three cars.

It remains unknown whether anyone has been injured.

We will bring you the latest updates as they come.

• Heathrow Airport
• Traffic and Travel
• Most Recent

Driver dies after car and lorry fire that has closed motorway in both directions

The carriageway was closed in both directions between junction 49 at Pont Abraham and junction 48 at Hendy in Carmarthenshire for more than 15 hours

• Updated 15:16, 20 MAR 2024

A driver has died in an accident involving a car and a lorry on the M4. The motorway was closed in both directions for more than 15 hours. The affected section was between junction 49 Pont Abraham and junction 48 Hendy, Llanelli, in Carmarthenshire.

Dyfed Powys Police said just after 1.15pm that officers remain at the scene of the crash that happened at about 11.20pm on Monday (March 18). A statement from the force said that a car collided with a stationary lorry on the M4 eastbound at junction 48 Hendy, resulting in both vehicles catching fire.

A spokesperson added: "Sadly the driver of the car died at the scene. Next of kin has been advised and is being supported by specialist officers."

The M4 eastbound and westbound between junctions 48, Hendy and 49, Pont Abraham were closed and road users were advised to avoid the area and take an alternative route if possible. The westbound lane re-opened at 2.17pm, while the eastbound lane was opened around 2.40pm after the vehicles were recovered from the scene.

There were delays on surrounding routes in the area and on the A48 and the A484 in Llanelli. A Welsh Ambulance Service spokesperson said: "We were called yesterday (18 March), at approximately 11.29pm, to reports of a multi vehicle road traffic collision on the eastbound side of the M4 motorway near Hendy."

• Police confirm driver died in crash 13:20

Motorway has now re-opened

Traffic Wales has just confirmed that the motorway has re-opened in both directions.

It had been full closed since the accident at around 11.20pm last night.

Part of M4 re-opens

Traffic Wales has confirmed in a 2.17pm update that the westbound carriageway has re-opened.

The eastbound will remain closed for recovery work at the scene.

Police confirm driver died in crash

A statement from Dyfed Powys Police said: "Officers remain at the scene of the road traffic collision which occurred at about 11.20pm, Monday 18th March 2024.

"A car collided with a stationary lorry on the M4 eastbound at junction 48 Hendy, resulting in both vehicles catching fire. Sadly the driver of the car died at the scene. Next of kin has been advised and is being supported by specialist officers.

"The M4 eastbound and westbound between junctions 48, Hendy and 49, Pont Abraham remain closed and road users are advised to avoid the area and take an alternative route if possible.

"It is anticipated that the westbound lane will open soon. The eastbound lane will remain closed until later this afternoon for recovery of the vehicles."

Road remains closed

The latest update from Traffic Wales says the road is likely to remain closed until early afternoon.

They say: "Please continue to use alternative routes however be prepared for delays and slow moving traffic. We appreciate your cooperation as Dyfed Powys Police deal with the ongoing incident."

Congestion remains on surrounding routes

The M4 remains closed.

Traffic monitoring system Inrix says: "M4 in both directions closed, long delays due to accident investigation work from junction 49 Pont Abraham to junction 48 Hendy. Congestion to after junction 47 Penllergaer for westbound traffic and delays on routes through Fforest, Hendy, Loughor and Pontarddulais."

Fire crews sent to the scene

The fire service has said that the Pontarddulais and Tumble crews were called to an incident along the M4 eastbound at junction 48 at 11.21pm.

Crews responded to a road traffic collision involving one private motor vehicle and one light goods vehicle.

A statement said: "Both vehicles were well alight on crews’ arrival and crews utilised one breathing apparatus set and two hose reel jets to extinguish the fires. Crews also utilised scene lighting and absorbent granules."

Crews left the scene at 1.19am this morning.

Fire after car collided with lorry

We have had a statement from Dyfed Powys Police.

Dyfed-Powys Police is in attendance at a road traffic collision which occurred at about 11.20pm, Monday 18 th March 2024. A car collided with a stationary lorry on the M4 eastbound at junction 48 Hendy, resulting in both vehicles being on fire. The M4 eastbound and westbound between junctions 48, Hendy and 49, Pont Abraham remain closed and road users are advised to avoid the area and take an alternative route if possible. It is anticipated that the road will remain closed until later this afternoon.

Road is still closed

The latest update from Traffic Wales says; "Westbound J48 Hendy - J49 Pont Abraham - Road remains closed in both directions. Delays are still showing between 10 minutes - 45 minutes in various locations within the alternative routes. Thank you for your cooperation at this time."

Police remain at the scene

Dyfed Powys Police have confirmed that officers are still at scene and road remains closed both ways.

Emergency services called to 'multi-vehicle accident'

A Welsh Ambulance Service spokesperson said they were called to reports of a "multi-vehicle" accident last night.

A statement said: "We were called yesterday (18 March), at approximately 11.29pm, to reports of a multi vehicle road traffic collision on the eastbound side of the M4 motorway near Hendy.

“We sent two Cymru High Acuity Response Units, one operations manager, one emergency ambulance and a Hazardous Area Response Team to the scene.”

Congestion in Llanelli

The M4 remains in both directions.

Traffic monitors are highlighting queueing traffic due to M4 closure on A484 in both directions from Parc Trostre Retail Park, Llanelli, to B4296 Victoria Road, Gowerton.

M4 congestion building

This is now the situation at junction 47 Penllergaer.

The queues are getting longer.

45-minute delays

Traffic Wales has issued an 8am update. They say: "Road continues to remain closed . Busy in the area delays showing as approximately 45 minutes in the surrounding areas. Please allow additional time for travel and thank you for your patience."

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Congestion on the M4

Cameras from the M4 show that traffic congestion is building westbound at junction 47 Penllergaer.

Local diversions are in place but there is heavy traffic in all directions in the area.

Congestion building in all directions

This is what traffic monitoring system Inrix says: "M4 in both directions closed, queueing traffic due to accident investigation work from junction 49 Pont Abraham Roundabout to junction 48 Hendy/Llanelli.

"Congestion to J47 Penllergaer for westbound traffic and delays on routes through Fforest, Hendy and Pontarddulais."

Accident on Prince of Wales bridge

There has also been an accident on another part of the M4.

One lane of the Prince of Wales Bridge is closed eastbound with congestion building in the area. Live updates on that here .

Police warning of A48 delays

Dyfed Powys Police say that the closures is causing long delays on the A48.

A statement said: "There are currently delays due to a collision on the M4. Please be patient and take an alternative route if possible or plan extra time into your journey. Thank you."

Accident investigation work

Traffic monitors are showing that accident investigation work is ongoing at the scene.

The road has been closed since just before midnight.

Road has been closed for hours

Traffic monitoring system Inrix says the road has been closed since before midnight following an accident.

The M4 is getting busier

The traffic cameras have been shut off between the two junctions affected by the closure, but the traffic camera at junction 47 Penllergaer shows there are no delays there.

Local diversions are in place when you get closer to the closure.

Map shows congestion

This map shows the section that has been closed.

The red line is the congestion that is building in the Fforest area this morning.

Police warning for motorists

This is what Dyfed Powys Police posted just before 6am.

South Wales Police had also said they had officers at the scene in the early hours of this morning.

Congestion on surrounding routes

Traffic Wales say that local diversions are in place.

Monitors are showing that there is already congestion to routes through Fforest and Hendy.

Emergency services on the scene for more than six hours

The section of the M4 has been closed overnight.

Traffic Wales first posted at 11.45am.

They said: "M4 travelling eastbound J48 Hendy to J47 Penllergaer closed due to a collision. Emergency services are on scene | Please find an alternative route."

• Traffic and Travel
• Carmarthenshire
• Most Recent

Best times to avoid M5 and M4 this weekend ahead of mega getaway

Motorists are being warned ahead of an estimated 27 million car journeys expected to occur over the upcoming weekend, with the M5 and M4 predicted to be among the most congested routes. Data from the RAC and transport analytics experts INRIX suggests that holidaymakers will embark on 2.4 million getaway car journeys on the first Friday after schools break up for summer, with traffic steadily increasing towards the weekend.

Between Monday, July 22 and Thursday, July 25, it's projected that 13m getaway trips will be undertaken before the usual rush commences over the first weekend of the summer holidays. On Friday, July 26, dubbed 'Frantic Friday' by the RAC, it's anticipated that a total of 3.2m journeys will be made as holidaymakers and daily commuters share the roads.

However, traffic congestion is forecasted to reach its peak on Saturday, July 27, with a total of 3.6m journeys predicted, followed by an additional 2.9m trips on Sunday. The RAC also forecasts that an extra four million getaways will occur between Friday and Sunday, resulting in a potential total of 13.8m trips over the course of the weekend.

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Historical data suggests that these three days could potentially be the second-busiest getaway weekend since 2015, only outdone in 2022 when 18.8m took to their vehicles following a series of Covid-related lockdowns.

Motorists are being advised to steer clear of the roads during peak times this weekend, with specific warnings for Friday and Saturday between 12pm and 5pm, and Sunday from 11am to 1pm. The M5 southbound is expected to be particularly congested from junction 15 near Bristol to junction 23 for Bridgwater, as travellers make their way towards Devon and Cornwall, reports Bristol Live .

RAC Breakdown's spokesperson Alice Simpson cautioned: "Anyone heading off on holiday on Saturday or Sunday should expect a weekend of woe on the roads with journeys taking far longer than normal. If you can't set off really early, then it's highly likely you'll be sitting in traffic for quite some time."

• Read Today's Paper

Delays ease on M4 Motorway near Prospect after serious motorcycle crash

Motorists on the M4 Motorway were warned to brace for delays after a serious motorcycle crash sparked traffic chaos on Monday morning.

Don't miss out on the headlines from NSW. Followed categories will be added to My News.

Traffic waded through water in the M5 tunnel on Monday morning in Sydney’s southwest after a car caught on fire on the motorway.

Commuters faced delays as emergency services were called to the M5 near Bexley Rd shortly after 7.20am following reports of a car fire in the tunnel.

Smoke detectors in the tunnel set off the sprinklers before traffic could be blocked from the tunnel, with vehicles wading throug huge puddles of water.

Firefighters arrived to find a car fully engulfed in flames, with crews extinguishing the fire shortly after their arrival.

The M5 citybound was closed for about an hour and diversions were in place.

As of 8.30am, the tunnel reopened and traffic conditions returned to normal.

At its peak traffic conditions were heavy with congestion banked back 7km to Riverwood.

In a separate incident, a man is fighting for life in hospital after a serious motorcycle crash on the M4 Motorway on Monday morning.

Paramedics were called to the M4 at Prospect near the Cumberland Highway Exit Ramp and Prospect Highway Off-Ramp just after 8am following reports of a multi-vehicle crash.

Officers were told a motorcyclist crashed into a guard rail and other vehicles.

The crash forced the closure of the M4 Motorway in the westbound direction for about 45 minutes.

The rider, a man aged 27, was treated at the scene by NSW Ambulance paramedics before being taken to Westmead Hospital in a critical condition.

The highway reopened but traffic conditions remained heavy until about 12pm, with queues banked back 10km to Parramatta for most of the morning.

Motorists were advised to use the Great Western Highway instead.

As of 1pm, emergency services cleared the wreckage from the scene and traffic returned to normal flow.

Do you know more? Message 0481 056 618 or email [email protected]

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Map reveals worst UK traffic hotspots ahead of summer ‘weekend of woe’

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UK roads will be teeming with traffic over the coming days as the busiest summer getaway season begins.

Holidaymakers are packing their bags as millions head for summer adventures after the school holidays kicked off across Britain.

It means roads are going to be jammed, with experts predicting a whopping 27,000,000 trips over the next week.

Follow Metro.co.uk’s live blog for latest London travel news

The RAC predicts a steady flow of traffic starting today – Tuesday July 23 -ahead of what is known as ‘Frantic Friday’ on July 26. That Friday alone is expected to see around 3,200,000 trips.

But some roads are set to be busier than others. And the RAC has helpfully revealed which spots could turn into traffic mayhem – and when to avoid them.

Where summer traffic hotspots are expected

UK roads are set to see staggered delays starting today – Tuesday, July 23.

Here are the hotspots where traffic is expected to be the worst over the weekend.

Traffic into major UK airports and holiday destinations will start building from Thursday, July 25 onwards, transport expert Inrix has warned.

It said drivers could be hit with delays of more than half an hour between the Chiswell Interchange near St Albans southbound to Gatwick Airport, and the A303 eastbound between Ilminster and Andover – the main route to London and the Southampton and Portsmouth ports and ferries to the Isle of Wight.

But it’s said the worst is still to come.

A monster queue of over two hours is set to develop on Saturday lunchtime on the M5 heading south between J15 (M4 and M5 interchange near Bristol) and J23 for Bridgwater as holidaymakers head to Devon and Cornwall, Inrix said.

The weekend is likely to be the second busiest summer getaway weekend since 2015, the RAC said.

Only 2022 saw more trips following two summers of Covid lockdowns – 18,800,000 were made between Friday, July 22 and Sunday, July 24 that year.

To make matters worse for stationary traffic, Frantic Friday could see temperatures reach mid-20s in parts of southern England and London, the Met Office forecast predicts.

Saturday, July 27 will be the busiest of all days with 3,600,000 trips by car, followed by another 2,900,000 trips on Sunday, according to RAC data.

There could be as many as 13,800,000 trips made over the ‘weekend of woe.’

When to avoid travelling on UK roads

Inrix told drivers to avoid travelling between 12pm and 5pm both Friday and Saturday.

On Sunday, July 28, the worst congestion is expected 11am and 1pm.

Your best chance of avoiding the worst getaway traffic is if you hit the road after 6pm on Friday and Saturday, or 3pm on Sunday, according to Inrix.

Saturday will see the worst hold-ups. Delays on A-roads and motorways are expected to take third longer than usual.

Problems with your car could land you waiting for recovery on the side of a busy motorway, risk an accident or being pulled over.

RAC said one-in-ten motorists decide to drive to a holiday destination knowing there is a problem with their car such as a warning light, mechanical issue, fluid leak or poor tread on a tyre.

RAC Breakdown spokesperson Alice Simpson said this figure was a ‘truly frightening statistic’ and equivalent of more than 2,700,000 drivers ‘at the wheel of a faulty vehicle this week.’

She said: ‘Anyone heading off on holiday on Saturday or Sunday should expect a weekend of woe on the roads with journeys taking far longer than normal.

If you’re heading out on a journey this weekend, make sure your #TRIP is a safe one. Always remember to Top up, Rest, Inspect and Prepare. Don’t forget to pack some essentials before you set off. For more info: ▶️ https://t.co/awzz3xm46q #Travel #Journey #WeatherReady pic.twitter.com/u63cc54Qdg — National Highways (@NationalHways) July 19, 2024

‘If you can’t set off really early, then it’s highly likely you’ll be sitting in traffic for quite some time.

‘Our research suggests this year’s getaway is set to be busier than average, possibly due to the UK inflation rate having slowed, giving people a bit more confidence to spend.

Traffic on UK roads on 'weekend of woe'

RAC said drivers will make around 27,000,000 leisure trips during the great summer getaway.

Here is the breakdown of trips.

Tuesday, July 23 – 2,400,000 journeys

Wednesday, July 24 – 2,600,000 journeys

Thursday, July 25 – 2,500,000 trips

Friday, July 26 – 3,200,000 trips

Saturday, July 27 – 3,600,000 journeys

Sunday, July 28 – 2,900,000 trips

‘However, with our recent bad weather causing an increase in international travel bookings, queues to major airports should not be underestimated. We’d advise drivers to plan their routes well in advance if jetting off abroad this week.’

RAC urged motorists to book their car for a check-up before setting off for a holiday as vehicle TLC outweighs ‘the expense of a nasty repair and precious lost holiday time.’

Bob Pishue, transportation analyst at INRIX, said that drivers should expect ‘long queues’ on major roads.

Being flexible with your route – whether that’s a longer journey in miles or the time you leave – could ‘reduce the stress of being held up and make for a more enjoyable trip,’ he added.

Have you been hit by any summer getaway traffic issues? Please contact [email protected].

Get in touch with our news team by emailing us at [email protected] .

For more stories like this, check our news page .

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• Map of the M4 Motorway

Map of M4 Motorway Junctions

Map of the M4 motorway junctions.

To the West the M4 joins the M5 at M4 Junction 20 which heads north to Devon Cornwall and the South West of England.

The Western end of the M4 is in South Wales Junctions 23 to 48. Bridgend is on Junctions 25 to 37, M4 Junctions 44 and 45 for Swansea, Junctions 30 to 33 for Cardiff and Junctions 24 to 28 for Newport. 

 East M4

At the eastern end of the M4 is London, with Junctions for Slough, Reading, Newbury, Swindon and Bristol on the way to Wales in the West.

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