Mountain Ash road traffic accidents
Mountain Ash recorded 417 collisions in the STATS19 data between 1999 and 2025, involving 576 casualties. Of these collisions, 3 were fatal and 49 were serious.
Severity Breakdown
- Fatal
- 3
- Serious
- 49
- Casualties
- 576
- Fatal
- 3
- Serious
- 49
- Casualties
- 576
Collisions by Year
Areas covering Mountain Ash
Roads in Mountain Ash
Postcode districts in Mountain Ash
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in Mountain Ash
Road collision statistics for Mountain Ash
Collisions recorded
417
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
576
Casualties recorded across every collision in this area.
Fatal collisions
3
Collisions in which at least one person died.
Serious collisions
49
12.5% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in Mountain Ash
Collisions in Mountain Ash are most frequently recorded on a Thursday (15.3% of the total), with 30.9% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
92.6% of recorded collisions in Mountain Ash happen on a single carriageway. Around 20.4% were recorded in adverse weather such as rain, snow or fog.
The collisions in Mountain Ash have produced 576 casualties. Pedestrians account for 25% 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 62 collisions, Monday 53 collisions, Tuesday 63 collisions, Wednesday 60 collisions, Thursday 64 collisions, Friday 59 collisions, Saturday 56 collisions.
Light conditions
Light conditions: Daylight 288 collisions, Darkness 129 collisions.
Road type
Road type: Single carriageway 386 collisions, One way street 10 collisions, Dual carriageway 7 collisions, Roundabout 6 collisions, Unknown 4 collisions, One way street/Slip road 3 collisions, Slip road 1 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 8 collisions, 30 mph 360 collisions, 40 mph 19 collisions, 50 mph 2 collisions, 60 mph 28 collisions.
Weather at the time
Weather at the time: Fine no high winds 327 collisions, Raining no high winds 63 collisions, Raining + high winds 12 collisions, Fine + high winds 5 collisions, Other 5 collisions.
Who was hurt
Who was hurt: Driver or rider 286 casualties, Passenger 146 casualties, Pedestrian 144 casualties.
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Recent Accidents
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SlightFrequently asked questions about road accidents in Mountain Ash
How many road accidents have there been in Mountain Ash?
417 collisions have been recorded in Mountain Ash in the STATS19 road safety data between 1999 and 2025, involving 576 casualties.
How many of the collisions in Mountain Ash were serious or fatal?
3 were fatal and 49 were serious — 12.5% of all recorded collisions in Mountain Ash resulted in a death or serious injury.
When do most road accidents happen in Mountain Ash?
Thursday is the most common day for collisions in Mountain Ash, accounting for 15.3% of them, and 30.9% of all collisions here happen in darkness.
What kind of roads do collisions in Mountain Ash happen on?
92.6% of collisions in Mountain Ash are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in Mountain Ash?
Pedestrians make up 25% of the 576 casualties recorded in Mountain Ash.
Where does the road accident data for Mountain Ash 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 Mountain Ash cover 1999 to 2025.