The A666: where people are seriously hurt
Over 2021–2025, 113 people were killed or seriously injured in 98 collisions on the A666, making it the 125th worst numbered road in Britain by that measure.
98
serious or fatal collisions
113
people killed or seriously injured
6
collisions that took a life
#125
of 150 numbered roads
What the record shows
The A666 carries 300 recorded injury collisions over the period, 98 of them serious or fatal. Serious injury concentrates in Blackburn with Darwen, Bolton, Salford, with 1 further areas also recording collisions. Its fatal share, 6%, sits close to the 7% average for the numbered network. Most collisions were recorded on 30 mph sections. The worst year of the period was 2024 with 25 serious collisions, and the count is up 18% between 2021 and 2025.
Every serious and fatal collision on the A666
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
- Blackburn with Darwen56 KSI
- Bolton28 KSI
- Salford12 KSI
- Ribble Valley2 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A666
2025: 20 (down 20% on the year before) · peak 25 in 2024 · +17.6% across the period
Axis clipped to the data range to show year-on-year movement.
About the A666
How many accidents happen on the A666?
Police recorded 300 injury collisions on the A666 over 2021–2025, of which 98 were fatal or serious. Those serious collisions left 113 people killed or seriously injured, including 6 fatal collisions.
Is the A666 a dangerous road?
By volume of serious injury it ranks 125 of the 150 numbered roads we analyse, and 115 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 A666 do collisions happen?
They concentrate in Blackburn with Darwen, Bolton, Salford. 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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