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HomeTrafficAccident Archive

M4 — UK Road Accident Archive

Motorway and A-road collisions from National Highways. Instant evidence reports from 99p — or £199 Expedited Service for serious cases£199 PREMIUM PLUS

15
Today
319
This Week
4,035
Severe Total
4,035
Total Collisions
319 collisions logged in the last 7 days — could one have affected you?
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30 serious collisions in this view. Premium Plus £199 includes a Premium Report, human review of your data within 4 working hours, and a panel solicitor calling you within 24h. Pick the relevant incident below to start.

351 incidents found on M4
M4
Severe Accident Expected clear: 16:45
M4 westbound between J18 and J19 | Westbound | Accident
Location : The M4 westbound between junctions J18 and J19 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 2 Jun 2026, 15:31 📍 Chippenham, Royal Wootton Bassett
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M40 3 related
Severe Accident
M40 J9 northbound access | Northbound | Accident
Location : The M40 northbound entry slip at junction J9 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The e
📅 2 Jun 2026, 09:21 📍 Oxford, Kidlington
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Related segments — same incident

Severe M40 southbound between J7 and J6 | Southbound | Accident Cleared 09:40 View → Severe M40 southbound between J7 and J6 | Southbound | Congestion Cleared 10:30 View →
M4
Severe Accident
M4 westbound between J2 and J3 | Westbound | Congestion
Location : The M4 westbound between junctions J2 and J3 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:00 and 18:15 on 2 Jun
📅 2 Jun 2026, 05:53 📍 Hounslow, Twickenham
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M4
Severe Accident
M4 J3 westbound access | Westbound | Accident
Location : The M4 westbound entry slip at junction J3 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 14:15 and 14:30 on 2 June
📅 2 Jun 2026, 02:51 📍 Hounslow, Feltham
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M4 3 related
Severe Accident
M4 J4 westbound access | Westbound | Accident
Location : The M4 westbound entry slip at junction J4 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 15:00 and 15:15 on 2 June
📅 2 Jun 2026, 00:29 📍 Ashford Middlesex, Staines
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Related segments — same incident

Severe M4 | Greater London | Carriageway Closure | Severe Delays 90 minutes Cleared 14:05 View → Severe M4 westbound between J4 and J4B | Westbound | Accident Cleared 11:15 View →
M40
Severe Accident
M40 J2 southbound exit | Southbound | Accident
Location : The M40 southbound exit slip at junction J2 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The ev
📅 2 Jun 2026, 00:24 📍 High Wycombe, Marlow
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M4
Severe Accident
M4 westbound between J11 and J12 | Westbound | Accident
Location : The M4 westbound between junctions J11 and J12 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 1 Jun 2026, 13:24 📍 Theale, Reading
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M42 2 related
Severe Accident
M42 northbound between J10 and J11 | Northbound | Accident
Location : The M42 northbound between junctions J10 and J11 . Reason : Road traffic collision. Status : Cleared.
📅 31 May 2026, 18:39 📍 Tamworth, Atherstone
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Related segments — same incident

Severe M42 northbound between J10 and J11 | Northbound | Congestion Cleared 20:10 View →
M4
Severe Accident
M4 J16 westbound access | Westbound | Accident
Location : The M4 westbound entry slip at junction J16 . Lane Closures : Lane two is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to cl
📅 30 May 2026, 21:23 📍 Swindon, Royal Wootton Bassett
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M42
Severe Accident
link road between M42 J7 northbound and M6 J4 northbound | Northbound | Accident
Location : The M42 northbound exit slip at junction J7 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 09:30 and 09:45 on 30 May
📅 30 May 2026, 04:59 📍 Knowle, Solihull
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M40
Severe Accident
M40 southbound within J1 | Southbound | Accident
Location : The M40 southbound at junction J1 . Lane Closures : Lane three is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear betw
📅 29 May 2026, 18:43 📍 High Wycombe, Beaconsfield
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M40
Severe Accident
M40 northbound between J9 and J10 | Northbound | Accident
Location : The M40 northbound between junctions J9 and J10 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is exp
📅 29 May 2026, 15:28 📍 Kidlington, Oxford
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M4 3 related
Severe Accident
M4 eastbound between J19 and J18 | Eastbound | Accident
Location : The M4 eastbound between junctions J19 and J18 . Reason : Road traffic collision. Status : Cleared.
📅 29 May 2026, 11:18 📍 Chippenham, Royal Wootton Bassett
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Related segments — same incident

Severe M4 eastbound between J22 and J21 | Eastbound | Congestion Cleared 13:20 View → Severe M4 westbound within J10 after A329(M) eastbound access | Westbound | Congestion Cleared 13:35 View →
M4
Severe Accident
M4 westbound between J10 and J11 | Westbound | Accident
Location : The M4 westbound between junctions J10 and J11 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 29 May 2026, 10:17 📍 Reading, Theale
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M40
Severe Accident
M40 northbound between J6 and J7 | Northbound | Accident
Location : The M40 northbound between junctions J6 and J8A . Lane Closures : Lane three is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expecte
📅 29 May 2026, 02:34 📍 Thame, Princes Risborough
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M4
Severe Accident
M4 westbound at the Reading services slip road between J11 and J12 | Westbound | Accident
Location : The M4 westbound entry slip at Reading Services. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 00:00 and 00:15 on 29
📅 28 May 2026, 21:14 📍 Theale, Reading
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M4 3 related
Severe Accident
M4 eastbound between J12 and J11 | Eastbound | Congestion
Location : The M4 eastbound between junctions J12 and J11 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 21:00 and 21:15 on 28
📅 28 May 2026, 17:20 📍 Theale, Reading
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Related segments — same incident

Severe M4 eastbound between J12 and J11 | Eastbound | Accident Cleared 21:55 View → Severe M4 eastbound between J19 and J18 | Eastbound | Accident View →
M40 2 related
Severe Accident
M40 northbound between J1A and J2 | Northbound | Congestion
Location : The M40 northbound between junctions J1A and J2 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:15 and 18:30 on 28
📅 28 May 2026, 15:29 📍 High Wycombe, Marlow
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Related segments — same incident

Severe M40 northbound between J1A and J2 | Northbound | Overturned Vehicle Cleared 18:15 View →
M4
Severe Accident
M4 eastbound between J16 and J15 | Eastbound | Accident
Location : The M4 eastbound between junctions J16 and J15 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 27 May 2026, 08:43 📍 Swindon, Royal Wootton Bassett
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M42
Severe Accident
M42 southbound between J5 and J4 | Southbound | Accident
Location : The M42 southbound between junctions J5 and J4 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expe
📅 26 May 2026, 17:44 📍 Knowle, Dorridge
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UK Road Accident Data — National Highways

UK Traffic Updates archives every collision, overturned vehicle incident, and vehicle fire recorded by National Highways across England's motorway and strategic road network. Records include timestamps, road closures, duration, severity, and location data.

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Data from National Highways under the Open Government Licence v3.0. © 2026 UK Traffic Updates.

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