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 199901QA00833
SeriousAccident 199901QA00824
SlightAccident 199901QA00822
SlightAccident 199901QA00826
SlightAccident 199901QA00825
SeriousAccident 199901QA00829
SlightAccident 199901QA00845
SlightAccident 199901QA00823
SlightAccident 199901QA00834
SeriousAccident 199901QA00827
SlightAccident 199901QA00839
SlightAccident 199901QA00814
SlightAccident 199901QA00813
SlightAccident 199901QA00843
SlightAccident 199901QA00815
SlightAccident 199901QA00820
SlightAccident 199901QA00821
SeriousAccident 199901QA00807
SeriousAccident 199901QA00816
SlightAccident 199901QA09261
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.