County council · England
Hertfordshire road collision data
Between 2021 and 2025, the police recorded 8,377 injury collisions in Hertfordshire's highway authority area, 1,755 of them fatal or serious. These are the published STATS19 figures, which also include motorways and trunk roads in the area.
- Injury collisions
- 8,377
- 2021–2025
- Casualties
- 11,456
- People injured or killed
- Fatal collisions
- 116
- 1,639 serious, 6,622 slight
- Vulnerable road users
- 53%
- of people killed or seriously injured
Collisions by year and severity
In 2025, Hertfordshire recorded 349 fatal or serious collisions, 1% below its average of 351 a year over 2021–2025.
| Year | Fatal | Serious | Slight | Total | Casualties | Fatal or serious |
|---|---|---|---|---|---|---|
| 2021 | 19 | 323 | 1,256 | 1,598 | 2,161 |
342
|
| 2022 | 24 | 339 | 1,417 | 1,780 | 2,518 |
363
|
| 2023 | 29 | 357 | 1,427 | 1,813 | 2,416 |
386
|
| 2024 | 21 | 294 | 1,333 | 1,648 | 2,267 |
315
|
| 2025 | 23 | 326 | 1,189 | 1,538 | 2,094 |
349
|
| 2021–2025 | 116 | 1,639 | 6,622 | 8,377 | 11,456 | 1,755 |
Casualties by road user
11,456 people were hurt in these collisions: 119 killed, 1,804 seriously injured and 9,533 slightly injured. Pedestrians, pedal cyclists and motorcyclists made up 53% of those killed or seriously injured.
| Road user | Casualties | Share | Killed or seriously injured | Share of KSI |
|---|---|---|---|---|
| Pedestrians | 1,190 | 10.4% | 369 | 19.2% |
| Pedal cyclists | 918 | 8.0% | 244 | 12.7% |
| Motorcyclists | 1,146 | 10.0% | 397 | 20.6% |
| All road users | 11,456 | 100% | 1,923 | 100% |
Roads with the most collisions
Classified roads in Hertfordshire, by injury collisions recorded on them in 2021–2025.
- M25 389 collisions · 58 fatal or serious
- M1 384 collisions · 60 fatal or serious
- A414 297 collisions · 64 fatal or serious
- A10 239 collisions · 45 fatal or serious
- A1(M) 215 collisions · 51 fatal or serious
- A602 210 collisions · 38 fatal or serious
- A41 188 collisions · 36 fatal or serious
- A5183 182 collisions · 43 fatal or serious
- A1000 161 collisions · 36 fatal or serious
- A505 160 collisions · 53 fatal or serious
Areas within Hertfordshire
Area pages with maps, hotspots and every collision, by collisions in 2021–2025.
How to get a formal collision extract from Hertfordshire
The council's road safety or traffic team holds the full police records for its area. A formal extract can add what the published data leaves out: contributory factors, the officer's description of each collision and the current year's provisional records. Developers, consultants and solicitors usually pay for it.
Published fee
Quote on request (cost recovery)
Hertfordshire County Council replies to each request with a quote. Its data services brochure says standard requests are delivered within 10 working days of the purchase order, or 20 working days for complex requests.
Source: Hertfordshire County Council: chargeable data service, checked 14 October 2026. Fees change, so confirm with the council before you order.
Source: Department for Transport road safety data (STATS19), 2021–2025, published under the Open Government Licence v3.0. Collisions are counted against the local highway authority area recorded by the police. Casualty severities are as recorded at the time and are not adjusted.