SL4 postcode district road traffic accidents
The SL4 postcode district recorded 2,637 collisions in the STATS19 data between 1999 and 2024, involving 3,389 casualties. Of these collisions, 36 were fatal and 350 were serious. Recorded collisions in 2024 were down 33% on 2023.
Severity Breakdown
- Fatal
- 36
- Serious
- 350
- Casualties
- 3,389
- Fatal
- 36
- Serious
- 350
- Casualties
- 3,389
Collisions by Year
Areas covering SL4
Towns in SL4
Roads in SL4
Accidents in the SL4 postcode district
Road collision statistics for the SL4 postcode district
Collisions recorded
2,637
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
3,389
Casualties recorded across every collision in this area.
Fatal collisions
36
Collisions in which at least one person died.
Serious collisions
350
14.6% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in the SL4 postcode district
Collisions in the SL4 postcode district are most frequently recorded on a Thursday (16.5% of the total), with 25.1% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
72.8% of recorded collisions in the SL4 postcode district happen on a single carriageway. Around 15.9% were recorded in adverse weather such as rain, snow or fog.
The collisions in the SL4 postcode district have produced 3,389 casualties. Pedestrians account for 10.3% 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 301 collisions, Monday 355 collisions, Tuesday 367 collisions, Wednesday 422 collisions, Thursday 434 collisions, Friday 425 collisions, Saturday 333 collisions.
Light conditions
Light conditions: Daylight 1,974 collisions, Darkness 663 collisions.
Road type
Road type: Single carriageway 1,919 collisions, Roundabout 421 collisions, Dual carriageway 216 collisions, One way street 39 collisions, Other 27 collisions, Slip road 11 collisions, Unknown 4 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 47 collisions, 30 mph 1,500 collisions, 40 mph 355 collisions, 50 mph 149 collisions, 60 mph 472 collisions, 70 mph 114 collisions.
Weather at the time
Weather at the time: Fine no high winds 2,195 collisions, Raining no high winds 291 collisions, Other 63 collisions, Fine + high winds 22 collisions, Unknown 22 collisions.
Who was hurt
Who was hurt: Driver or rider 2,410 casualties, Passenger 631 casualties, Pedestrian 348 casualties.
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Recent Accidents
Showing 20 of 2,637 accidents
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SlightFrequently asked questions about road accidents in the SL4 postcode district
How many road accidents have there been in the SL4 postcode district?
2,637 collisions have been recorded in the SL4 postcode district in the STATS19 road safety data between 1999 and 2024, involving 3,389 casualties.
How many of the collisions in the SL4 postcode district were serious or fatal?
36 were fatal and 350 were serious — 14.6% of all recorded collisions in the SL4 postcode district resulted in a death or serious injury.
When do most road accidents happen in the SL4 postcode district?
Thursday is the most common day for collisions in the SL4 postcode district, accounting for 16.5% of them, and 25.1% of all collisions here happen in darkness.
What kind of roads do collisions in the SL4 postcode district happen on?
72.8% of collisions in the SL4 postcode district are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in the SL4 postcode district?
Pedestrians make up 10.3% of the 3,389 casualties recorded in the SL4 postcode district.
Is road safety in the SL4 postcode district getting better or worse?
Recorded collisions in the SL4 postcode district fell 33% 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 the SL4 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 SL4 postcode district cover 1999 to 2024.