The A303: where people are seriously hurt
Over 2021–2025, 169 people were killed or seriously injured in 134 collisions on the A303, making it the 80th worst numbered road in Britain by that measure.
134
serious or fatal collisions
169
people killed or seriously injured
28
collisions that took a life
#80
of 150 numbered roads
What the record shows
The A303 carries 553 recorded injury collisions over the period, 134 of them serious or fatal. Serious injury concentrates in Wiltshire, Test Valley, Somerset, with 3 further areas also recording collisions. Collisions here are more likely than average to be fatal: 21% against 7% across the numbered network, which usually points to higher speeds. Most collisions were recorded on 70 mph sections. The worst year of the period was 2025 with 36 serious collisions, and the count is up 57% between 2021 and 2025.
Every serious and fatal collision on the A303
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
- Wiltshire56 KSI
- Test Valley29 KSI
- Somerset23 KSI
- South Somerset11 KSI
- Winchester7 KSI
- East Devon4 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A303
2025: 36 (up 50% on the year before) · peak 36 in 2025 · +56.5% across the period
Axis clipped to the data range to show year-on-year movement.
About the A303
How many accidents happen on the A303?
Police recorded 553 injury collisions on the A303 over 2021–2025, of which 134 were fatal or serious. Those serious collisions left 169 people killed or seriously injured, including 28 fatal collisions.
Is the A303 a dangerous road?
By volume of serious injury it ranks 80 of the 150 numbered roads we analyse, and 74 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 A303 do collisions happen?
They concentrate in Wiltshire, Test Valley, Somerset. 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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