The A505: where people are seriously hurt
Over 2021–2025, 170 people were killed or seriously injured in 145 collisions on the A505, making it the 70th worst numbered road in Britain by that measure.
145
serious or fatal collisions
170
people killed or seriously injured
16
collisions that took a life
#70
of 150 numbered roads
What the record shows
The A505 carries 582 recorded injury collisions over the period, 145 of them serious or fatal. Serious injury concentrates in North Hertfordshire, Luton, South Cambridgeshire, with 1 further areas also recording collisions. Collisions here are more likely than average to be fatal: 11% against 7% across the numbered network, which usually points to higher speeds. Most collisions were recorded on 30 mph sections. The worst year of the period was 2023 with 33 serious collisions, and the count is down 12% between 2021 and 2025.
Every serious and fatal collision on the A505
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
- North Hertfordshire53 KSI
- Luton47 KSI
- South Cambridgeshire26 KSI
- Central Bedfordshire19 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A505
2025: 28 (up 40% on the year before) · peak 33 in 2023 · -12.5% across the period
Axis clipped to the data range to show year-on-year movement.
About the A505
How many accidents happen on the A505?
Police recorded 582 injury collisions on the A505 over 2021–2025, of which 145 were fatal or serious. Those serious collisions left 170 people killed or seriously injured, including 16 fatal collisions.
Is the A505 a dangerous road?
By volume of serious injury it ranks 70 of the 150 numbered roads we analyse, and 64 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 A505 do collisions happen?
They concentrate in North Hertfordshire, Luton, South Cambridgeshire. 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.