NN4 postcode district road traffic accidents
The NN4 postcode district recorded 2,594 collisions in the STATS19 data between 1999 and 2025, involving 3,398 casualties. Of these collisions, 49 were fatal and 445 were serious. Recorded collisions in 2025 were up 6% on 2024.
Severity Breakdown
- Fatal
- 49
- Serious
- 445
- Casualties
- 3,398
- Fatal
- 49
- Serious
- 445
- Casualties
- 3,398
Collisions by Year
Areas covering NN4
Towns in NN4
Roads in NN4
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in the NN4 postcode district
Road collision statistics for the NN4 postcode district
Collisions recorded
2,594
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
3,398
Casualties recorded across every collision in this area.
Fatal collisions
49
Collisions in which at least one person died.
Serious collisions
445
19% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in the NN4 postcode district
Collisions in the NN4 postcode district are most frequently recorded on a Friday (17.3% of the total), with 29% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
40.3% of recorded collisions in the NN4 postcode district happen on a single carriageway. Around 18.1% were recorded in adverse weather such as rain, snow or fog.
The collisions in the NN4 postcode district have produced 3,398 casualties. Pedestrians account for 6.4% 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 279 collisions, Monday 380 collisions, Tuesday 380 collisions, Wednesday 384 collisions, Thursday 383 collisions, Friday 448 collisions, Saturday 340 collisions.
Light conditions
Light conditions: Daylight 1,841 collisions, Darkness 753 collisions.
Road type
Road type: Single carriageway 1,045 collisions, Dual carriageway 890 collisions, Roundabout 588 collisions, Slip road 58 collisions, One way street/Slip road 8 collisions, Unknown 3 collisions, One way street 2 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 27 collisions, 30 mph 972 collisions, 40 mph 452 collisions, 50 mph 110 collisions, 60 mph 374 collisions, 70 mph 659 collisions.
Weather at the time
Weather at the time: Fine no high winds 2,125 collisions, Raining no high winds 355 collisions, Other 37 collisions, Fog or mist 22 collisions, Unknown 22 collisions.
Who was hurt
Who was hurt: Driver or rider 2,307 casualties, Passenger 872 casualties, Pedestrian 219 casualties.
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Recent Accidents
Showing 20 of 445 accidents
Accident 2025340WN7292
SeriousAccident 2025340WN7572
SeriousAccident 2025340WN6912
SeriousAccident 2025340WN6612
SeriousAccident 2025340WN6432
SeriousAccident 2025340WN4842
SeriousAccident 2025340WN4582
SeriousAccident 2025340WN4502
SeriousAccident 2025340WN4472
SeriousAccident 2025340WN3282
SeriousAccident 2025340WN3002
SeriousAccident 2025340WN2092
SeriousAccident 2025340WN1412
SeriousAccident 2025340WN0972
SeriousAccident 2025340WN0882
SeriousAccident 2025340WN1022
SeriousAccident 2025340WN0502
SeriousAccident 2024340WN7222
SeriousAccident 2024340WN7272
SeriousAccident 2024340WN6322
SeriousFrequently asked questions about road accidents in the NN4 postcode district
How many road accidents have there been in the NN4 postcode district?
2,594 collisions have been recorded in the NN4 postcode district in the STATS19 road safety data between 1999 and 2025, involving 3,398 casualties.
How many of the collisions in the NN4 postcode district were serious or fatal?
49 were fatal and 445 were serious — 19% of all recorded collisions in the NN4 postcode district resulted in a death or serious injury.
When do most road accidents happen in the NN4 postcode district?
Friday is the most common day for collisions in the NN4 postcode district, accounting for 17.3% of them, and 29% of all collisions here happen in darkness.
What kind of roads do collisions in the NN4 postcode district happen on?
40.3% of collisions in the NN4 postcode district are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in the NN4 postcode district?
Pedestrians make up 6.4% of the 3,398 casualties recorded in the NN4 postcode district.
Is road safety in the NN4 postcode district getting better or worse?
Recorded collisions in the NN4 postcode district rose 6% in 2025 compared with 2024. Year-on-year figures move with both genuine risk and changes in reporting, so they are best read as a trend rather than a single verdict.
Where does the road accident data for the NN4 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 NN4 postcode district cover 1999 to 2025.