The A315: where people are seriously hurt
Over 2021–2025, 233 people were killed or seriously injured in 226 collisions on the A315, making it the 35th worst numbered road in Britain by that measure.
226
serious or fatal collisions
233
people killed or seriously injured
4
collisions that took a life
#35
of 150 numbered roads
What the record shows
The A315 carries 1,107 recorded injury collisions over the period, 226 of them serious or fatal. Serious injury concentrates in Hounslow, Hammersmith and Fulham, Kensington and Chelsea, with 1 further areas also recording collisions. Collisions here are less likely than average to be fatal (2% against 7%), typical of lower-speed urban sections. Most collisions were recorded on 20 mph sections. The worst year of the period was 2024 with 56 serious collisions, and the count is up 76% between 2021 and 2025.
Every serious and fatal collision on the A315
Blue markers are serious collisions, red crosses fatal. Click any marker for the year. Zoom in to see the specific junctions and stretches where they cluster.
Where along the route
- Hounslow113 KSI
- Hammersmith and Fulham59 KSI
- Kensington and Chelsea41 KSI
- Westminster13 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A315
2025: 51 (down 8.9% on the year before) · peak 56 in 2024 · +75.9% across the period
Axis clipped to the data range to show year-on-year movement.
About the A315
How many accidents happen on the A315?
Police recorded 1,107 injury collisions on the A315 over 2021–2025, of which 226 were fatal or serious. Those serious collisions left 233 people killed or seriously injured, including 4 fatal collisions.
Is the A315 a dangerous road?
By volume of serious injury it ranks 35 of the 150 numbered roads we analyse, and 31 among a roads. That is a count rather than a rate: longer and busier roads accumulate more collisions, so a high ranking reflects exposure as well as risk.
Where on the A315 do collisions happen?
They concentrate in Hounslow, Hammersmith and Fulham, Kensington and Chelsea. The map on this page plots every serious and fatal collision recorded on the route, so you can see the specific stretches rather than the total.
Counts include every collision the police recorded on this road number across all authority areas. They are not adjusted for traffic volume or road length, so treat them as a measure of where injury concentrates rather than a per-mile risk rating. Method. Free to reuse with attribution to this page.
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