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HomeTrafficAccident Archive

M4 — UK Road Accident Archive

Motorway and A-road collisions from National Highways — free to search. Downloadable evidence reports are coming soon.

1
Today
20
This Week
1,249
Severe Total
1,249
Total Collisions
20 collisions logged in the last 7 days — could one have affected you?
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Downloadable evidence reports — coming soon
Search the full archive free below. Timestamped certificates & court-ready reports for insurance, HR and legal claims are on the way. Get notified & stay ahead with Early Warning →
115 incidents found on M4
M4
Severe Accident
M4 | Wiltshire | Carriageway Closure | Expect Delays
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 02:06 on the 15.08.26
📅 15 Aug 2026, 02:59 📍 Swindon, Royal Wootton Bassett
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M40
Severe Accident
M40 | Oxfordshire | Carriageway Closure | Severe Delays 2 hours
The M40 in Oxfordshire is closed northbound between J10 and J11 due to a serious collision.
📅 7 Aug 2026, 12:49 📍 Bicester, Woodstock
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M4
Severe Accident
M4 | Wiltshire | Carriageway Closure | Expect Delays
The M4 in Wiltshire is closed in eastbound between J15 (Swindon) and J14 (Hungerford) due to a collision
📅 6 Aug 2026, 09:35 📍 Hungerford, Marlborough
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M42
Severe Accident
M42 | Warwickshire | Carriageway Closure | Expect Delays
The M42 in Warwickshire is closed southbound between J10 (Tamworth) and J9 (Curdworth) following a serious collision.
📅 24 Jul 2026, 05:32 📍 Tamworth, Atherstone
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M4
Severe Accident
M4 | Greater London | Carriageway Closure | Expect Delays
The M4 in Greater London is closed westbound between J3 near (Feltham) and J4B (M25 interchange) near Heathrow Airport following a vehicle collision.
📅 22 Jul 2026, 16:40 📍 Hayes, Feltham
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M4 2 related
Severe Accident
M4 | Wiltshire | Road Closure | Long Delays 60 minutes
The M4 westbound in Wiltshire is closed between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 20:05 this evening. Traffic on the eastbound carriagewa
📅 18 Jul 2026, 20:49 📍 Swindon, Royal Wootton Bassett
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Related segments — same incident

Severe M4 | Wiltshire | Carriageway Closure | Expect Delays Cleared 09:55 View →
M42
Severe Accident
M42 | West Midlands | Carriageway Closure | Expect Delays
The M42 in the West Midlands is closed northbound between J3A (M40) and J4 (Solihull) due to a collision, resulting in a substantial fuel spillage across the road
📅 9 Jul 2026, 05:41 📍 Dorridge, Solihull
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M42
Severe Accident
M42 | Warwickshire | Carriageway Closure | Expect Delays
The M42 in Warwickshire is closed southbound between J10 (Tamworth) and J9 (Curdworth) following a multi-vehicle collision.
📅 6 Jul 2026, 23:39 📍 Tamworth, Atherstone
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M40
Severe Crash
M40 southbound between J5 and J4 | Southbound | Accident
Location : The M40 southbound between junctions J5 and J4 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 19:15 and 19:30 on 28
📅 28 Jun 2026, 18:19 📍 High Wycombe, Princes Risborough
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M4
Severe Crash
M4 J11 westbound exit | Westbound | Accident
Location : The M4 westbound exit slip at junction J11 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 19:15 and 19:30 on 25 June
📅 25 Jun 2026, 18:20 📍 Theale, Reading
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M42
Severe Crash
link road from M42 J3A southbound to M40 southbound | Southbound | Accident
Location : The M40 southbound between the M42 southbound and junction J15 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 13:15
📅 20 Jun 2026, 12:14 📍 Dorridge, Knowle
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M4
Severe Crash
M4 westbound between J19 and J20 | Westbound | Accident
Location : The M4 westbound between junctions J19 and J20 . Lane Closures : The hard shoulder is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is e
📅 12 Jun 2026, 15:28 📍 Chipping Sodbury, Dursley
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M4
Severe Crash
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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M4
Severe Crash
M4 eastbound between J19 and J18 | Eastbound | Accident
Location : The M4 eastbound between junctions J19 and J18 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 28 May 2026, 16:37 📍 Chippenham, Royal Wootton Bassett
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M4
Severe Crash
M4 eastbound within J4 | Eastbound | Accident
Location : The M4 eastbound at junction J4 . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is e
📅 23 May 2026, 05:28 📍 Ashford Middlesex, Staines
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M40
Severe Crash
M40 northbound within J1A before M25 J16 anti-clockwise access | Northbound | Accident
Location : The M40 northbound at junction J1A . Lane Closures : Lane three is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear bet
📅 15 May 2026, 08:34 📍 High Wycombe, Beaconsfield
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M4
Severe Crash
M4 eastbound between J17 and J16 | Eastbound | Congestion
Location : The M4 eastbound between junctions J18 and J16 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 11:00 and 11:15 on 11
📅 11 May 2026, 11:09 📍 Swindon, Royal Wootton Bassett
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M42
Severe Crash
M42 northbound between J2 and J3 | Northbound | Accident
Location : The M42 northbound between junctions J2 and J3 . Reason : Road traffic collision. Status : Currently Active. Lanes Closed : There are lane closures.
📅 26 Apr 2026, 03:38 📍 Redditch, Dorridge
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M4
Severe Crash
M4 eastbound between J3 and J2 | Eastbound | Accident
Location : The M4 eastbound between junctions J3 and J2 . Lane Closures : Lane one is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to
📅 16 Apr 2026, 12:00 📍 Hounslow, Twickenham
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M4
Severe Crash
M4 westbound between J5 and J6 | Westbound | Accident
Location : The M4 westbound between junctions J5 and J6 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The
📅 15 Apr 2026, 06:37 📍 Slough, Windsor
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M4
Severe Crash
M4 eastbound between J19 and J18 | Eastbound | Accident
Location : The M4 eastbound between junctions J19 and J18 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 03:30 and 03:45 on 22
📅 22 Mar 2026, 02:24 📍 Chippenham, Royal Wootton Bassett
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M4
Severe Crash
M4 westbound between J20 and J21 | Westbound | Accident
Location : The M4 westbound between junctions J20 and J21 . Lane Closures : Lane two is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected t
📅 21 Mar 2026, 12:24 📍 Chipping Sodbury, Keynsham
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M40
Severe Accident
M40 northbound between J15 and J16 | Northbound | Accident
Location : The M40 northbound between junctions J15 and J16 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear :
📅 21 Mar 2026, 05:54 📍 Leamington Spa, Kenilworth
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M40 3 related
Severe Overturned Vehicle
M40 J3 southbound access | Southbound | Overturned Vehicle
Location : The M40 southbound entry slip at junction J3 . Reason : Accident involving an overturned vehicle. Status : Currently Active. Time To Clear : The event is expected to clear between 12:00
📅 20 Mar 2026, 10:29 📍 High Wycombe, Marlow
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Related segments — same incident

Severe Overturned Vehicle M40 J4 southbound access | Southbound | Overturned Vehicle Cleared 10:35 View → Severe Overturned Vehicle M40 southbound between J3 and J2 | Southbound | Overturned Vehicle Cleared 10:30 View →
M4
Severe Accident
M4 westbound between J5 and J6 | Westbound | Accident
Location : The M4 westbound between junctions J5 and J6 . Reason : Road traffic collision. Status : Cleared.
📅 20 Mar 2026, 08:17 📍 Slough, Windsor
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M40
Severe Accident ↺ 1h 1m
M40 southbound between J1A and J1 | Southbound | Accident
Location : The M40 southbound between junctions J1A and J1 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is exp
📅 18 Mar 2026, 18:03 📍 High Wycombe, Beaconsfield
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M4
Severe Accident ↺ 1h 6m
M4 westbound between J4 and J4B | Westbound | Accident
Location : The M4 westbound between junctions J4 and J4B . Lane Closures : The hard shoulder, lanes 1, 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clea
📅 18 Mar 2026, 15:58 📍 Iver, Staines
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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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