Cardiff road traffic accidents
Cardiff recorded 15,892 collisions in the STATS19 data between 1999 and 2024, involving 21,182 casualties. Of these collisions, 138 were fatal and 1,431 were serious. Recorded collisions in 2024 were down 21% on 2023.
Severity Breakdown
- Fatal
- 138
- Serious
- 1,431
- Casualties
- 21,182
- Fatal
- 138
- Serious
- 1,431
- Casualties
- 21,182
Collisions by Year
Areas covering Cardiff
Roads in Cardiff
Postcode districts in Cardiff
Accidents in Cardiff
Road collision statistics for Cardiff
Collisions recorded
15,892
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
21,182
Casualties recorded across every collision in this area.
Fatal collisions
138
Collisions in which at least one person died.
Serious collisions
1,431
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 28.9% 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 21,182 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 1,675 collisions, Monday 2,256 collisions, Tuesday 2,350 collisions, Wednesday 2,366 collisions, Thursday 2,374 collisions, Friday 2,656 collisions, Saturday 2,215 collisions.
Light conditions
Light conditions: Daylight 11,295 collisions, Darkness 4,597 collisions.
Road type
Road type: Single carriageway 11,106 collisions, Dual carriageway 3,150 collisions, Roundabout 997 collisions, Unknown 286 collisions, Other 135 collisions, One way street 119 collisions, Slip road 99 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 539 collisions, 30 mph 13,941 collisions, 40 mph 755 collisions, 50 mph 214 collisions, 60 mph 103 collisions, 70 mph 340 collisions.
Weather at the time
Weather at the time: Fine no high winds 12,392 collisions, Raining no high winds 2,135 collisions, Unknown 608 collisions, Raining + high winds 326 collisions, Other 200 collisions.
Who was hurt
Who was hurt: Driver or rider 12,134 casualties, Passenger 5,112 casualties, Pedestrian 3,936 casualties.
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Recent Accidents
Showing 20 of 15,892 accidents
Accident 2017621701400
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SlightAccident 2017621701460
SlightAccident 2017621701468
SlightAccident 2017621800743
SlightAccident 2017621701501
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SlightAccident 2017621701513
SlightAccident 2017621701347
SlightAccident 2017621701346
SlightAccident 2017621701329
SlightAccident 2017621701335
SeriousAccident 2017621701342
SlightAccident 2017621701323
SlightFrequently asked questions about road accidents in Cardiff
How many road accidents have there been in Cardiff?
15,892 collisions have been recorded in Cardiff in the STATS19 road safety data between 1999 and 2024, involving 21,182 casualties.
How many of the collisions in Cardiff were serious or fatal?
138 were fatal and 1,431 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 28.9% 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 21,182 casualties recorded in Cardiff.
Is road safety in Cardiff getting better or worse?
Recorded collisions in Cardiff fell 21% in 2024 compared with 2023, though year-on-year figures move with both genuine risk and changes in reporting.
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 2024.