The A308: where people are seriously hurt
Over 2021–2025, 210 people were killed or seriously injured in 203 collisions on the A308, making it the 41th worst numbered road in Britain by that measure.
203
serious or fatal collisions
210
people killed or seriously injured
5
collisions that took a life
#41
of 150 numbered roads
What the record shows
The A308 carries 966 recorded injury collisions over the period, 203 of them serious or fatal. Serious injury concentrates in Kensington and Chelsea, Spelthorne, Kingston upon Thames, with 3 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 30 mph sections. The worst year of the period was 2021 with 49 serious collisions, and the count is down 20% between 2021 and 2025.
Every serious and fatal collision on the A308
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
- Kensington and Chelsea39 KSI
- Spelthorne35 KSI
- Kingston upon Thames32 KSI
- Richmond upon Thames29 KSI
- Hammersmith and Fulham28 KSI
- Windsor and Maidenhead28 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A308
2025: 39 (up 21.9% on the year before) · peak 49 in 2021 · -20.4% across the period
Axis clipped to the data range to show year-on-year movement.
About the A308
How many accidents happen on the A308?
Police recorded 966 injury collisions on the A308 over 2021–2025, of which 203 were fatal or serious. Those serious collisions left 210 people killed or seriously injured, including 5 fatal collisions.
Is the A308 a dangerous road?
By volume of serious injury it ranks 41 of the 150 numbered roads we analyse, and 36 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 A308 do collisions happen?
They concentrate in Kensington and Chelsea, Spelthorne, Kingston upon Thames. 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.
Need this data for your own work?
Site and junction reports from £95, next working day. Free for community groups, campaigners and journalists.