This report covers 1,330 police-recorded collisions on the M4 between 6 January 2020 and 29 December 2025. The data is sourced from the Department for Transport STATS19 dataset and reflects incidents reported to police forces across England and Wales.
Of these collisions, 46 were fatal (3.5%), 200 were serious (15%), and 1,084 resulted in slight injuries. A total of 2,004 casualties were recorded across 2,866 vehicles.
The UKTU Danger Score of 98/100 is calculated from collision frequency, fatality count, severity ratio, and total casualty count.
📈 Increasing — collisions increased from 178 to 252
🌤️ Weather Conditions
🛣️ Road Surface
💡 Light Conditions
🚦 Speed Limit Zones
| Reference | Date | Time | Junction | Speed | Weather | Casualties | Vehicles |
|---|---|---|---|---|---|---|---|
| 2025541675932 | 30 Nov 2025 | 02:01 | Not at junction | 70mph | Fine no high winds | 2 | 1 |
| 2025430407273 | 10 Aug 2025 | 21:54 | Not at junction | 70mph | Fine no high winds | 1 | 1 |
| 2025547629925 | 22 Jun 2025 | 23:25 | Not at junction | 70mph | Fine no high winds | 8 | 2 |
| 2025430230402 | 11 May 2025 | 14:25 | Not at junction | 70mph | Fine no high winds | 18 | 1 |
| 2024522401098 | 26 Mar 2024 | 13:01 | Not at junction | 70mph | Fine no high winds | 5 | 2 |
| 2024631422247 | 18 Mar 2024 | 23:17 | Not at junction | 70mph | Raining no high wind | 2 | 2 |
| 2024542784424 | 09 Mar 2024 | 11:50 | Not at junction | 70mph | Fine no high winds | 4 | 1 |
| 2024610004924 | 29 Jan 2024 | 21:00 | Not at junction | 70mph | Fine no high winds | 3 | 3 |
| 2024622400101 | 26 Jan 2024 | 15:12 | Not at junction | 70mph | Fine no high winds | 1 | 4 |
| 2024430025271 | 17 Jan 2024 | 15:10 | Not at junction | 70mph | Fine no high winds | 1 | 2 |
| 2024430009724 | 07 Jan 2024 | 21:46 | Not at junction | 70mph | Fine no high winds | 1 | 9 |
| 202454T000024 | 02 Jan 2024 | 21:14 | Not at junction | 70mph | Unknown | 1 | 2 |
| 202354D067723 | 09 Dec 2023 | 18:32 | Not at junction | 70mph | Fine + high winds | 1 | 3 |
| 2023010474719 | 29 Oct 2023 | 11:35 | Not at junction | 70mph | Raining no high wind | 4 | 1 |
| 202354B149223 | 20 Oct 2023 | 09:10 | Not at junction | 70mph | Raining no high wind | 3 | 5 |
| 2023522301172 | 17 Jul 2023 | 00:05 | Not at junction | 70mph | Fine no high winds | 8 | 2 |
| 2023010454939 | 13 Jul 2023 | 08:52 | Not at junction | 50mph | Fine no high winds | 2 | 3 |
| 2023622300338 | 17 Apr 2023 | 14:28 | Not at junction | 70mph | Fine no high winds | 1 | 1 |
| 2023541868323 | 20 Feb 2023 | 00:46 | Not at junction | 70mph | Fine no high winds | 1 | 1 |
| 2022622200673 | 28 Jul 2022 | 16:48 | Not at junction | 70mph | Fine no high winds | 1 | 2 |