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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
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115 incidents found on M4
M42
Severe Accident
M42 southbound between J5 and J4 | Southbound | Accident
Location : The M42 southbound between junctions J5 and J4 . Reason : Road traffic collision. Status : Cleared.
📅 17 Mar 2026, 15:04 📍 Knowle, Dorridge
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M4
Severe Accident ↺ 1h 1m
M4 westbound between J17 and J18 | Westbound | Accident
Location : The M4 westbound between junctions J17 and J18 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 16 Mar 2026, 20:04 📍 Royal Wootton Bassett, Swindon
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M42
Severe Accident
M42 southbound between J9 and J8 | Southbound | Accident
Location : The M42 southbound between junctions J9 and J8 . Reason : Road traffic collision. Status : Cleared.
📅 16 Mar 2026, 13:57 📍 Atherstone, Coleshill
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M40
Severe Accident ↺ 1h 6m
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 :
📅 15 Mar 2026, 14:58 📍 Leamington Spa, Kenilworth
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M40
Severe Accident ↺ 2h 4m
M40 northbound between J3 and J4 | Northbound | Accident
Location : The M40 northbound between junctions J3 and J4 . Lane Closures : Lane three is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected
📅 15 Mar 2026, 13:00 📍 High Wycombe, Marlow
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M4
Severe Accident ↺ 2h 1m
M4 westbound within J12 | Westbound | Accident
Location : The M4 westbound at junction J12 . Lane Closures : Lane three is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear betwe
📅 14 Mar 2026, 07:03 📍 Theale, Pangbourne
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M4
Severe Accident ↺ 1h 7m
link road from M4 J4B eastbound to M25 J15 | Eastbound | Accident
Location : The M4 eastbound exit slip at junction J4B . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 18:00 and 18:15 on 13 Marc
📅 13 Mar 2026, 16:57 📍 Iver, Staines
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M4
Severe Accident ↺ 2h 1m
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
📅 13 Mar 2026, 14:03 📍 Theale, Reading
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M42
Severe Accident ↺ 3h 1m
M42 northbound between J1 and J2 | Northbound | Accident
Location : The M42 northbound between junctions M5 and J2 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expe
📅 12 Mar 2026, 22:03 📍 Redditch, Dorridge
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M4
Severe Accident ↺ 1h 2m
M4 eastbound between J12 and J11 | Eastbound | Accident
Location : The M4 eastbound between junctions J12 and J11 . Lane Closures : Lanes 2, 3 and 4 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is e
📅 12 Mar 2026, 11:02 📍 Theale, Reading
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M42
Severe Accident
M42 northbound between J4 and J5 | Northbound | Accident
Location : The M42 northbound between junctions J4 and J5 . Reason : Road traffic collision. Status : Cleared.
📅 11 Mar 2026, 17:02 📍 Knowle, Dorridge
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M4
Severe Accident ↺ 1h 5m
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
📅 11 Mar 2026, 14:59 📍 Feltham, Hayes
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M40
Severe Vehicle Fire ↺ 1h 0m
M40 southbound between J13 and J12 | Southbound | Vehicle Fire
Location : The M40 southbound between junctions J14 and J12 . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Vehicle fire. Status : Currently Active. Time To Clear : The ev
📅 11 Mar 2026, 14:04 📍 Banbury, Southam
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M4
Severe Accident
M4 westbound between J20 and J21 | Westbound | Accident
Location : The M4 westbound between junctions J20 and J21 . Reason : Road traffic collision. Status : Cleared.
📅 11 Mar 2026, 08:55 📍 Chipping Sodbury, Keynsham
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M4
Severe Vehicle Fire ↺ 1h 9m
M4 eastbound within J4B | Eastbound | Vehicle Fire
Location : The M4 eastbound at junction J4B . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Vehicle fire. Status : Currently Active. Time To Clear : The event is expected t
📅 10 Mar 2026, 08:55 📍 Iver, Staines
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M4 2 related
Severe Accident ↺ 4h 0m
M4 eastbound within J10 after A329(M) westbound access | Eastbound | Accident
Location : The M4 eastbound at junction J10 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expe
📅 10 Mar 2026, 07:04 📍 Reading, Woodley
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Related segments — same incident

Severe Accident link road from A329(M) eastbound to M4 J10 eastbound | Eastbound | Accident Cleared 13:05 View →
M4
Severe Accident ↺ 7h 2m
M4 eastbound between J11 and J10 | Eastbound | Accident
Location : The M4 eastbound between junctions J11 and J10 . Lane Closures : The hard shoulder, lanes 1, 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Cle
📅 9 Mar 2026, 20:03 📍 Reading, Theale
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M40 2 related
Severe Accident ↺ 3h 0m
M40 southbound between J9 and J8A | Southbound | Accident
Location : The M40 southbound between junctions J9 and J8A . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 12:45 and 13:00 on 9
📅 9 Mar 2026, 07:04 📍 Oxford, Abingdon
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Related segments — same incident

Severe Accident M40 J9 southbound access | Southbound | Accident Cleared 10:05 View →
M42
Severe Accident ↺ 2h 3m
M42 J10 northbound access | Northbound | Accident
Location : The M42 northbound entry slip at junction J10 . Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to clear between 22:00 and 22:15 on 8 Ma
📅 8 Mar 2026, 20:01 📍 Tamworth, Atherstone
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M40
Severe Accident ↺ 1h 5m
M40 northbound between J2 and J3 | Northbound | Accident
Location : The M40 northbound between junctions J2 and J4 . Lane Closures : The hard shoulder, lanes 1 and 2 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear
📅 8 Mar 2026, 00:59 📍 High Wycombe, Marlow
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M4
Severe Accident ↺ 9h 10m
M4 westbound between J8 and J10 | Westbound | Accident
Location : The M4 westbound between junctions J8 and J10 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Accident involving a vehicle that has left the carriageway. Status : Cu
📅 7 Mar 2026, 22:54 📍 Twyford, Woodley
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M4
Severe Accident ↺ 2h 8m
M4 eastbound between J16 and J15 | Eastbound | Accident
Location : The M4 eastbound between junctions J16 and J15 . Lane Closures : Lanes 2 and 3 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expe
📅 7 Mar 2026, 07:56 📍 Swindon, Royal Wootton Bassett
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M4
Severe Accident ↺ 1h 7m
M4 eastbound between J17 and J16 | Eastbound | Accident
Location : The M4 eastbound between junctions J17 and J16 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 6 Mar 2026, 23:57 📍 Swindon, Royal Wootton Bassett
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M4
Severe Vehicle Fire ↺ 1h 2m
M4 westbound between J10 and J11 | Westbound | Vehicle Fire
Location : The M4 westbound between junctions J10 and J11 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Vehicle fire. Status : Currently Active. Time To Clear : The event is
📅 6 Mar 2026, 18:02 📍 Reading, Theale
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M40
Severe Vehicle Fire ↺ 1h 9m
M40 northbound between J1A and J2 | Northbound | Vehicle Fire
Location : The M40 northbound between junctions J1A and J2 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Vehicle fire. Status : Currently Active. Time To Clear : The event i
📅 6 Mar 2026, 16:55 📍 High Wycombe, Marlow
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M40
Severe Accident ↺ 1h 12m
M40 northbound between J3 and J4 | Northbound | Accident
Location : The M40 northbound between junctions J3 and J4 . Lane Closures : The hard shoulder and lane 1 are closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : Th
📅 6 Mar 2026, 10:22 📍 High Wycombe, Marlow
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M4 2 related
Severe Accident ↺ 35m
M4 eastbound between J4 and J3 | Eastbound | Accident
Location : The M4 eastbound between junctions J4 and J3 . Lane Closures : Lane four is closed. Reason : Road traffic collision. Status : Currently Active. Time To Clear : The event is expected to
📅 5 Mar 2026, 12:34 📍 Feltham, Hayes
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Related segments — same incident

Severe Accident M4 westbound between J3 and J4 | Westbound | Accident Cleared 13:15 View →
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UK Road Accident Data — National Highways

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