Harrow road traffic accidents
Harrow recorded 12,942 collisions in the STATS19 data between 1999 and 2025, involving 15,863 casualties. Of these collisions, 84 were fatal and 1,577 were serious. Recorded collisions in 2025 were up 5% on 2024.
Severity Breakdown
- Fatal
- 84
- Serious
- 1,577
- Casualties
- 15,863
- Fatal
- 84
- Serious
- 1,577
- Casualties
- 15,863
Collisions by Year
Areas covering Harrow
Roads in Harrow
Postcode districts in Harrow
Planning applications nearby
Data from PlanIndex, an index of UK planning registers.
Data from PlanIndex, an index of UK planning registers.
Accidents in Harrow
Road collision statistics for Harrow
Collisions recorded
12,942
Police-reported road traffic collisions captured in the STATS19 data.
People injured or killed
15,863
Casualties recorded across every collision in this area.
Fatal collisions
84
Collisions in which at least one person died.
Serious collisions
1,577
12.8% of collisions here ended in a death or serious injury.
Severity of collisions
What the data shows in Harrow
Collisions in Harrow are most frequently recorded on a Friday (16.2% of the total), with 29.8% happening in darkness rather than daylight. The most common posted speed limit at the scene is 30 mph.
80.2% of recorded collisions in Harrow happen on a single carriageway. Around 18.5% were recorded in adverse weather such as rain, snow or fog.
The collisions in Harrow have produced 15,863 casualties. Pedestrians account for 19.2% 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 1,471 collisions, Monday 1,790 collisions, Tuesday 1,890 collisions, Wednesday 1,872 collisions, Thursday 1,972 collisions, Friday 2,102 collisions, Saturday 1,845 collisions.
Light conditions
Light conditions: Daylight 9,090 collisions, Darkness 3,852 collisions.
Road type
Road type: Single carriageway 10,384 collisions, Dual carriageway 1,038 collisions, Roundabout 885 collisions, Unknown 250 collisions, One way street 196 collisions, Slip road 134 collisions, One way street/Slip road 55 collisions.
Speed limit at the scene
Speed limit at the scene: 20 mph 614 collisions, 30 mph 12,004 collisions, 40 mph 311 collisions, 50 mph 8 collisions, 60 mph 2 collisions.
Weather at the time
Weather at the time: Fine no high winds 10,480 collisions, Raining no high winds 1,598 collisions, Unknown 375 collisions, Other 289 collisions, Fine + high winds 72 collisions.
Who was hurt
Who was hurt: Driver or rider 9,423 casualties, Passenger 3,397 casualties, Pedestrian 3,043 casualties.
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Recent Accidents
Showing 20 of 12,942 accidents
Accident 199901QA00355
SlightAccident 199901QD00255
SlightAccident 199901QD00256
SlightAccident 199901QA00353
SlightAccident 199901QA00348
SlightAccident 199901QA00346
SlightAccident 199901QA00342
SlightAccident 199901QA00357
SlightAccident 199901QA00344
SlightAccident 199901QA00350
SeriousAccident 199901QA00343
SlightAccident 199901QA00345
SlightAccident 199901QA00334
SeriousAccident 199901QA00336
SeriousAccident 199901QA00337
SlightAccident 199901QD00249
SlightAccident 199901QA00341
SlightAccident 199901QA00339
SlightAccident 199901QA00332
SeriousAccident 199901QA00335
SlightFrequently asked questions about road accidents in Harrow
How many road accidents have there been in Harrow?
12,942 collisions have been recorded in Harrow in the STATS19 road safety data between 1999 and 2025, involving 15,863 casualties.
How many of the collisions in Harrow were serious or fatal?
84 were fatal and 1,577 were serious — 12.8% of all recorded collisions in Harrow resulted in a death or serious injury.
When do most road accidents happen in Harrow?
Friday is the most common day for collisions in Harrow, accounting for 16.2% of them, and 29.8% of all collisions here happen in darkness.
What kind of roads do collisions in Harrow happen on?
80.2% of collisions in Harrow are recorded on a single carriageway, most often where the limit is 30 mph.
Are pedestrians often hurt in collisions in Harrow?
Pedestrians make up 19.2% of the 15,863 casualties recorded in Harrow.
Is road safety in Harrow getting better or worse?
Recorded collisions in Harrow rose 5% 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 Harrow 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 Harrow cover 1999 to 2025.