Diss road traffic accidents
Diss recorded 355 collisions in the STATS19 data between 1999 and 2025, involving 420 casualties. Of these collisions, 2 were fatal and 66 were serious. Recorded collisions in 2025 were down 31% on 2024.
Severity Breakdown
- Fatal
- 2
- Serious
- 66
- Casualties
- 420
- Fatal
- 2
- Serious
- 66
- Casualties
- 420
Collisions by Year
Areas covering Diss
Roads in Diss
Postcode districts in Diss
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in Diss
Road collision statistics for Diss
Collisions recorded
355
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
420
Casualties recorded across every collision in this area.
Fatal collisions
2
Collisions in which at least one person died.
Serious collisions
66
19.2% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in Diss
Collisions in Diss are most frequently recorded on a Friday (16.6% of the total), with 22.3% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
89.6% of recorded collisions in Diss happen on a single carriageway. Around 14.4% were recorded in adverse weather such as rain, snow or fog.
The collisions in Diss have produced 420 casualties. Pedestrians account for 25.7% 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 34 collisions, Monday 52 collisions, Tuesday 58 collisions, Wednesday 50 collisions, Thursday 48 collisions, Friday 59 collisions, Saturday 54 collisions.
Light conditions
Light conditions: Daylight 276 collisions, Darkness 79 collisions.
Road type
Road type: Single carriageway 318 collisions, One way street 14 collisions, Roundabout 10 collisions, One way street/Slip road 7 collisions, Unknown 6 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 12 collisions, 30 mph 337 collisions, 60 mph 6 collisions.
Weather at the time
Weather at the time: Fine no high winds 304 collisions, Raining no high winds 30 collisions, Other 9 collisions, Unknown 4 collisions, Snowing no high winds 3 collisions.
Who was hurt
Who was hurt: Driver or rider 258 casualties, Passenger 54 casualties, Pedestrian 108 casualties.
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Recent Accidents
Showing 20 of 355 accidents
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SlightFrequently asked questions about road accidents in Diss
How many road accidents have there been in Diss?
355 collisions have been recorded in Diss in the STATS19 road safety data between 1999 and 2025, involving 420 casualties.
How many of the collisions in Diss were serious or fatal?
2 were fatal and 66 were serious — 19.2% of all recorded collisions in Diss resulted in a death or serious injury.
When do most road accidents happen in Diss?
Friday is the most common day for collisions in Diss, accounting for 16.6% of them, and 22.3% of all collisions here happen in darkness.
What kind of roads do collisions in Diss happen on?
89.6% of collisions in Diss are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in Diss?
Pedestrians make up 25.7% of the 420 casualties recorded in Diss.
Is road safety in Diss getting better or worse?
Recorded collisions in Diss fell 31% in 2025 compared with 2024, though year-on-year figures move with both genuine risk and changes in reporting.
Where does the road accident data for Diss 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 Diss cover 1999 to 2025.