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HomeTrafficAccident Archive

M4 — UK Road Accident Archive

Motorway and A-road collisions from National Highways. Instant evidence reports from 99p.

16
Today
304
This Week
1,999
Severe Total
2,751
Total Collisions
304 collisions logged in the last 7 days — could one have affected you?
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242 incidents found on M4
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
📅 4 May 2026, 03:13 📍 Reading, Theale
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M4 2 related
Severe Accident
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
📅 3 May 2026, 21:52 📍 Chippenham, Royal Wootton Bassett
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Related segments — same incident

Moderate M4 westbound between J18 and J19 | Westbound | Congestion Cleared 23:50 View →
M4
Severe Accident
M4 westbound between J14 and J15 | Westbound | Accident
Location : The M4 westbound between junctions J14 and J15 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expe
📅 3 May 2026, 20:34 📍 Hungerford, Marlborough
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M4
Severe Accident
M4 eastbound between J4 and J3 | Eastbound | Accident
Location : The M4 eastbound between junctions J4 and J3 . Lane Closures : Lane one is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to
📅 3 May 2026, 11:58 📍 Feltham, Hayes
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M4 2 related
Moderate Accident
M4 eastbound between J13 and J12 | Eastbound | Congestion
Location : The M4 eastbound between junctions J13 and J12 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 20:00 and 20:15 on 2 M
📅 2 May 2026, 19:09 📍 Thatcham, Theale
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Related segments — same incident

Moderate M4 eastbound between J13 and J12 | Eastbound | Congestion Cleared 19:40 View →
M4 2 related
Moderate Accident
M4 eastbound between J13 and J12 | Eastbound | Congestion
Location : The M4 eastbound between junctions J13 and J12 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:15 and 18:30 on 2 M
📅 2 May 2026, 17:39 📍 Thatcham, Theale
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Related segments — same incident

Moderate M4 eastbound between J13 and J12 | Eastbound | Accident Cleared 20:55 View →
M40 5 related
Severe Accident
M40 J7 southbound access | Southbound | Accident
Location : The M40 southbound entry slip at junction J7 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 19:15 and 19:30 on 1 May
📅 1 May 2026, 17:59 📍 Thame, Wallingford
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Related segments — same incident

Moderate M40 southbound between J8A and J8 | Southbound | Congestion Cleared 20:40 View → Severe M40 J8 southbound access | Southbound | Accident Cleared 19:00 View → Severe M40 J8A southbound access | Southbound | Accident Cleared 19:00 View → Severe M40 | Oxfordshire | Carriageway Closure | Long Delays 30 minutes Cleared 19:00 View →
M40 2 related
Moderate Accident
M40 southbound between J7 and J6 | Southbound | Accident
Location : The M40 southbound between junctions J8A and J6 . Reason : Road traffic collision. Status : Cleared.
📅 1 May 2026, 17:19 📍 Thame, Princes Risborough
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Related segments — same incident

Moderate M40 southbound between J7 and J6 | Southbound | Congestion Cleared 18:25 View →
M4
Severe Accident
M4 eastbound between J7 and J6 | Eastbound | Accident
Location : The M4 eastbound between junctions J7 and J6 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The
📅 30 Apr 2026, 12:43 📍 Slough, Burnham
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M42 2 related
Moderate Accident
M42 northbound within J10 | Northbound | Congestion
Location : The M42 northbound at junction J10 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 08:30 and 08:45 on 30 April 2026.
📅 30 Apr 2026, 07:43 📍 Tamworth, Atherstone
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Related segments — same incident

Moderate M42 northbound between J10 and J11 | Northbound | Accident Cleared 09:25 View →
M4
Severe Accident
M4 westbound between J16 and J17 | Westbound | Accident
Location : The M4 westbound between junctions J16 and J17 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Accident involving a vehicle that has left the carriageway. Status : C
📅 27 Apr 2026, 19:23 📍 Swindon, Royal Wootton Bassett
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M4 2 related
Severe Accident
M4 J16 westbound access | Westbound | Accident
Location : The M4 westbound entry slip at junction J16 . Reason : Accident involving a vehicle that has left the carriageway. Status : Currently Active. Time To Clear : The event is expected to cle
📅 27 Apr 2026, 16:29 📍 Swindon, Royal Wootton Bassett
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Related segments — same incident

Moderate M4 J16 westbound exit | Westbound | Congestion Cleared 20:15 View →
M48 3 related
Moderate Accident
M48 westbound between J1 and J2 | Westbound | Congestion
Location : The M48 westbound between the M4 and junction J2 . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 16:00 and 16:15 on 2
📅 27 Apr 2026, 14:59 📍 Chipping Sodbury, Lydney
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Related segments — same incident

Moderate M48 westbound between J1 and J2 | Westbound | Congestion Cleared 15:40 View → Moderate M48 westbound between J1 and J2 | Westbound | Accident Cleared 16:30 View →
M4
Severe Accident
M4 | Wiltshire | Road Closure | Long Delays 60 minutes
The M4 in Wiltshire is closed in both directions between J16 (near Swindon) and J17 (near Chippenham) following a serious collision that occurred approx. 17:40 yesterday afternoon.
📅 27 Apr 2026, 10:43 📍 Swindon, Royal Wootton Bassett
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M4 4 related
Severe Accident
M4 J13 westbound access | Westbound | Accident
Location : The M4 westbound entry slip at junction J13 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 17:45 and 18:00 on 27 Apr
📅 27 Apr 2026, 08:23 📍 Newbury, Thatcham
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Related segments — same incident

Severe M4 | Berkshire | Road Closure | Expect Delays Cleared 15:05 View → Severe M4 westbound between J13 and J14 | Westbound | Accident Cleared 15:00 View → Moderate M4 westbound between J16 and J17 | Westbound | Congestion Cleared 11:55 View →
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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.

If you were involved in an accident on a UK motorway or A-road, this archive can help you find the incident record. Our instant reports come in four tiers: 99p Micro Certificate (instant timestamp proof), £2.99 Delay Certificate (HR or insurance proof of delay), £7.99 Standard Report (full incident details with weather and road context), and £49.99 Premium Court-Ready Report (complete evidence pack with full timeline, traffic impact analysis, emergency services detection, blackspot history, and meteorological conditions). Reports generate within seconds, not months.

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

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