ST4 postcode district road traffic accidents
The ST4 postcode district recorded 5,049 collisions in the STATS19 data between 1999 and 2025, involving 6,720 casualties. Of these collisions, 52 were fatal and 363 were serious. Recorded collisions in 2025 were down 2% on 2024.
Severity Breakdown
- Fatal
- 52
- Serious
- 363
- Casualties
- 6,720
- Fatal
- 52
- Serious
- 363
- Casualties
- 6,720
Collisions by Year
Areas covering ST4
Towns in ST4
Roads in ST4
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in the ST4 postcode district
Road collision statistics for the ST4 postcode district
Collisions recorded
5,049
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
6,720
Casualties recorded across every collision in this area.
Fatal collisions
52
Collisions in which at least one person died.
Serious collisions
363
8.2% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in the ST4 postcode district
Collisions in the ST4 postcode district are most frequently recorded on a Friday (17.2% of the total), with 27.6% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
55.1% of recorded collisions in the ST4 postcode district happen on a single carriageway. Around 20.5% were recorded in adverse weather such as rain, snow or fog.
The collisions in the ST4 postcode district have produced 6,718 casualties. Pedestrians account for 11.2% 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 475 collisions, Monday 719 collisions, Tuesday 720 collisions, Wednesday 842 collisions, Thursday 769 collisions, Friday 866 collisions, Saturday 658 collisions.
Light conditions
Light conditions: Daylight 3,655 collisions, Darkness 1,394 collisions.
Road type
Road type: Single carriageway 2,784 collisions, Dual carriageway 1,321 collisions, Roundabout 568 collisions, Slip road 161 collisions, One way street 104 collisions, One way street/Slip road 74 collisions, Unknown 37 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 14 collisions, 30 mph 3,788 collisions, 40 mph 233 collisions, 50 mph 720 collisions, 60 mph 116 collisions, 70 mph 176 collisions.
Weather at the time
Weather at the time: Fine no high winds 4,012 collisions, Raining no high winds 724 collisions, Unknown 77 collisions, Other 69 collisions, Raining + high winds 68 collisions.
Who was hurt
Who was hurt: Driver or rider 4,195 casualties, Passenger 1,770 casualties, Pedestrian 753 casualties.
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Recent Accidents
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FatalFrequently asked questions about road accidents in the ST4 postcode district
How many road accidents have there been in the ST4 postcode district?
5,049 collisions have been recorded in the ST4 postcode district in the STATS19 road safety data between 1999 and 2025, involving 6,720 casualties.
How many of the collisions in the ST4 postcode district were serious or fatal?
52 were fatal and 363 were serious — 8.2% of all recorded collisions in the ST4 postcode district resulted in a death or serious injury.
When do most road accidents happen in the ST4 postcode district?
Friday is the most common day for collisions in the ST4 postcode district, accounting for 17.2% of them, and 27.6% of all collisions here happen in darkness.
What kind of roads do collisions in the ST4 postcode district happen on?
55.1% of collisions in the ST4 postcode district are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in the ST4 postcode district?
Pedestrians make up 11.2% of the 6,718 casualties recorded in the ST4 postcode district.
Is road safety in the ST4 postcode district getting better or worse?
Recorded collisions in the ST4 postcode district fell 2% 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 the ST4 postcode district 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 the ST4 postcode district cover 1999 to 2025.