Cardiff road traffic accidents
Cardiff recorded 16,119 collisions in the STATS19 data between 1999 and 2025, involving 21,465 casualties. Of these collisions, 138 were fatal and 1,463 were serious. Recorded collisions in 2025 were up 16% on 2024.
Severity Breakdown
- Fatal
- 138
- Serious
- 1,463
- Casualties
- 21,465
- Fatal
- 138
- Serious
- 1,463
- Casualties
- 21,465
Collisions by Year
Areas covering Cardiff
Roads in Cardiff
Postcode districts in Cardiff
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in Cardiff
Road collision statistics for Cardiff
Collisions recorded
16,119
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
21,465
Casualties recorded across every collision in this area.
Fatal collisions
138
Collisions in which at least one person died.
Serious collisions
1,463
9.9% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in Cardiff
Collisions in Cardiff are most frequently recorded on a Friday (16.7% of the total), with 29% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
69.9% of recorded collisions in Cardiff happen on a single carriageway. Around 22% were recorded in adverse weather such as rain, snow or fog.
The collisions in Cardiff have produced 21,465 casualties. Pedestrians account for 18.6% of those casualties, a marker of the risk to people on foot here.
Collisions by day of the week
Collisions by day of the week: Sunday 1,697 collisions, Monday 2,291 collisions, Tuesday 2,397 collisions, Wednesday 2,392 collisions, Thursday 2,401 collisions, Friday 2,694 collisions, Saturday 2,247 collisions.
Light conditions
Light conditions: Daylight 11,449 collisions, Darkness 4,670 collisions.
Road type
Road type: Single carriageway 11,268 collisions, Dual carriageway 3,197 collisions, Roundabout 1,010 collisions, Unknown 286 collisions, One way street/Slip road 135 collisions, One way street 123 collisions, Slip road 100 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 716 collisions, 30 mph 13,972 collisions, 40 mph 766 collisions, 50 mph 221 collisions, 60 mph 103 collisions, 70 mph 341 collisions.
Weather at the time
Weather at the time: Fine no high winds 12,579 collisions, Raining no high winds 2,169 collisions, Unknown 610 collisions, Raining + high winds 326 collisions, Other 201 collisions.
Who was hurt
Who was hurt: Driver or rider 12,325 casualties, Passenger 5,149 casualties, Pedestrian 3,991 casualties.
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Recent Accidents
Showing 20 of 16,119 accidents
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SlightFrequently asked questions about road accidents in Cardiff
How many road accidents have there been in Cardiff?
16,119 collisions have been recorded in Cardiff in the STATS19 road safety data between 1999 and 2025, involving 21,465 casualties.
How many of the collisions in Cardiff were serious or fatal?
138 were fatal and 1,463 were serious — 9.9% of all recorded collisions in Cardiff resulted in a death or serious injury.
When do most road accidents happen in Cardiff?
Friday is the most common day for collisions in Cardiff, accounting for 16.7% of them, and 29% of all collisions here happen in darkness.
What kind of roads do collisions in Cardiff happen on?
69.9% of collisions in Cardiff are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in Cardiff?
Pedestrians make up 18.6% of the 21,465 casualties recorded in Cardiff.
Is road safety in Cardiff getting better or worse?
Recorded collisions in Cardiff rose 16% in 2025 compared with 2024. Year-on-year figures move with both genuine risk and changes in reporting, so they are best read as a trend rather than a single verdict.
Where does the road accident data for Cardiff come from?
It comes from STATS19, the official record of personal-injury road collisions reported to the police and published by the Department for Transport. The figures for Cardiff cover 1999 to 2025.