The A1000: where people are seriously hurt
Over 2021–2025, 103 people were killed or seriously injured in 94 collisions on the A1000, making it the 134th worst numbered road in Britain by that measure.
94
serious or fatal collisions
103
people killed or seriously injured
4
collisions that took a life
#134
of 150 numbered roads
What the record shows
The A1000 carries 505 recorded injury collisions over the period, 94 of them serious or fatal. Serious injury concentrates in Barnet, Welwyn Hatfield, Hertsmere. Collisions here are less likely than average to be fatal (4% 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 22 serious collisions, and the count is down 18% between 2021 and 2025.
Every serious and fatal collision on the A1000
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
- Barnet58 KSI
- Welwyn Hatfield28 KSI
- Hertsmere8 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A1000
2025: 18 (up 28.6% on the year before) · peak 22 in 2021 · -18.2% across the period
Axis clipped to the data range to show year-on-year movement.
About the A1000
How many accidents happen on the A1000?
Police recorded 505 injury collisions on the A1000 over 2021–2025, of which 94 were fatal or serious. Those serious collisions left 103 people killed or seriously injured, including 4 fatal collisions.
Is the A1000 a dangerous road?
By volume of serious injury it ranks 134 of the 150 numbered roads we analyse, and 124 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 A1000 do collisions happen?
They concentrate in Barnet, Welwyn Hatfield, Hertsmere. 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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