M4 Traffic

M4 01:24am

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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 exit slip at junction J19 (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 23:45 and 00:00 on 30 Jan 2026.
Return to normal: Normal traffic conditions are expected between 23:45 and 00:00 on 30 Jan 2026.
Lanes closed: There is one of two lanes closed.
Nearest town: 5.15m from Alveston. CLEARED @ 23:14
CONGESTION
Location: The M4 westbound between junctions J19 (Bristol)and J20 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 00:45 and 01:00 on 30 Jan 2026.
Nearest town: 3.89m from Alveston. CLEARED @ 00:53
J41 PENTYLA/BAGLAN TO J43 LLANDARCY
Description: M4WestboundJ41 (Port Talbot) Pentyla/Baglan to J43 (Neath) LlandarcyRoad closed31/01/26-02/02/26 2000-0600Diversions in place :,Start time: 31/01/2026 20:00 ,End Date:02/02/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 24/01/2026 8:10
Nearest town: 1.97m from Llandarcy. CLEARED @ 00:30
CONGESTION
Location: The M4 westbound between junctions J19 (Bristol)and J20 (Bristol) .
Reason: Congestion.
Status: Currently Active.
Return to normal: Normal traffic conditions are expected between 23:30 and 23:45 on 29 Jan 2026.
Delay: There are currently delays of 10 minutes against expected traffic.
Nearest town: 3.89m from Alveston. CLEARED @ 23:32


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 entry slip at junction J19 (Bristol) .
Lane closures: Lanes 1 and 2 will be closed.
Reason: Roadside drains works are planned.
Status: Pending.
Schedule: From 21:00 on 5 Feb 2026 to 06:00 on 6 Feb 2026.
Lanes Closed: All lanes will be closed.
Nearest town: 5.18m from Bristol.
ROAD WORKS
Location: The M4 eastbound between junctions J20 (Bristol)and J19 (Bristol) .
Lane closures: Lanes 2 and 3 will be closed.
Reason: Roadside drains works are planned.
Status: Pending.
Schedule: From 21:00 on 5 Feb 2026 to 06:00 on 6 Feb 2026.
Lanes Closed: There will be two of three lanes closed.
Nearest town: 3.98m from Alveston.
ROAD WORKS
Location: The M4 eastbound between junctions J19 (Bristol)and J18 (Bath) .
Lane closures: Lanes 1,2 and 3 will be closed.
Reason: Roadside drains works are planned.
Status: Pending.
Schedule: From 21:00 on 5 Feb 2026 to 06:00 on 6 Feb 2026.
Lanes Closed: All lanes will be closed.
Nearest town: 5.01m from Alveston.
ROAD WORKS
Location: The M4 westbound between junctions J17 (Chippenham)and J18 (Bath) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 5 Feb 2026 to 06:00 on 6 Feb 2026.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 6.76m from Chippenham.
ROAD WORKS
Location: The M4 eastbound between junctions J18 (Bath)and J17 (Chippenham) .
Lane closures: Lane three will be closed.
Reason: Barrier repairs are planned.
Status: Pending.
Schedule: From 20:00 on 5 Feb 2026 to 06:00 on 6 Feb 2026.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 7.8m from Chippenham.
ROAD WORKS
Location: The M4 westbound between junctions J8 (High Wycombe)and J10 (Reading) .
Lane closures: Lane one will be closed.
Reason: Roadside equipment maintenance is planned.
Status: Pending.
Schedule: From 20:00 on 5 Feb 2026 to 05:00 on 6 Feb 2026.
Lanes Closed: There will be one of four lanes closed.
Nearest town: 1.44m from Bray.
ROAD WORKS
Location: The M4 westbound at junction J8 (High Wycombe) .
Lane closures: Lane one will be closed.
Reason: Roadside equipment maintenance is planned.
Status: Pending.
Schedule: From 20:00 on 5 Feb 2026 to 05:00 on 6 Feb 2026.
Lanes Closed: There will be one of three lanes closed.
Nearest town: 1.06m from Bray.

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

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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: eastbound exit slip at junction J19 (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 23:45 and 00:00 on 30 January 2026.

Normal traffic conditions are expected between 23:45 and 00:00 on 30 January 2026.

Lanes Closed : There is one of two lanes closed.
Nearest town: 5.15m from Alveston.

51.51--2.52

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

Due to: Congestion.



Normal traffic conditions are expected between 00:45 and 01:00 on 30 January 2026.
Nearest town: 3.89m from Alveston.

51.53--2.53

Description: M4 : Westbound : J41 (Port Talbot) Pentyla/Baglan to J43 (Neath) Llandarcy : Road closed : 31/01/26-02/02/26 2000-0600 : Diversions in place :,Start time: 31/01/2026 20:00 ,End Date:02/02/2026 6:00,Severity: Road closure,Source: Welsh Government, Last updated: 24/01/2026 8:10
Nearest town: 1.97m from Llandarcy.

51.63--3.82

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

Due to: Congestion.



Normal traffic conditions are expected between 23:30 and 23:45 on 29 January 2026.

Delay : There are currently delays of 10 minutes against expected traffic.
Nearest town: 3.89m from Alveston.

51.53--2.53

Location: eastbound entry slip at junction J19 (Bristol) .

Lane Closures : Lanes 1 and 2 will be closed.

Due to: Roadside drains works are planned.

Status : Pending.

Schedule : From 21:00 on 5 February 2026 to 06:00 on 6 February 2026.

Lanes Closed : All lanes will be closed.
Nearest town: 5.18m from Bristol.

51.51--2.52

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

Lane Closures : Lanes 2 and 3 will be closed.

Due to: Roadside drains works are planned.

Status : Pending.

Schedule : From 21:00 on 5 February 2026 to 06:00 on 6 February 2026.

Lanes Closed : There will be two of three lanes closed.
Nearest town: 3.98m from Alveston.

51.53--2.53

Location: eastbound between junctions J19 (Bristol)and J18 (Bath) .

Lane Closures : Lanes 1,2 and 3 will be closed.

Due to: Roadside drains works are planned.

Status : Pending.

Schedule : From 21:00 on 5 February 2026 to 06:00 on 6 February 2026.

Lanes Closed : All lanes will be closed.
Nearest town: 5.01m from Alveston.

51.52--2.52

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

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 5 February 2026 to 06:00 on 6 February 2026.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 6.76m from Chippenham.

51.52--2.25

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

Lane Closures : Lane three will be closed.

Due to: Barrier repairs are planned.

Status : Pending.

Schedule : From 20:00 on 5 February 2026 to 06:00 on 6 February 2026.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 7.8m from Chippenham.

51.52--2.28

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

Lane Closures : Lane one will be closed.

Due to: Roadside equipment maintenance is planned.

Status : Pending.

Schedule : From 20:00 on 5 February 2026 to 05:00 on 6 February 2026.

Lanes Closed : There will be one of four lanes closed.
Nearest town: 1.44m from Bray.

51.5--0.73

Location: westbound at junction J8 (High Wycombe) .

Lane Closures : Lane one will be closed.

Due to: Roadside equipment maintenance is planned.

Status : Pending.

Schedule : From 20:00 on 5 February 2026 to 05:00 on 6 February 2026.

Lanes Closed : There will be one of three lanes closed.
Nearest town: 1.06m from Bray.

51.5--0.72