The A503: where people are seriously hurt
Over 2021–2025, 182 people were killed or seriously injured in 175 collisions on the A503, making it the 52th worst numbered road in Britain by that measure.
175
serious or fatal collisions
182
people killed or seriously injured
4
collisions that took a life
#52
of 150 numbered roads
What the record shows
The A503 carries 989 recorded injury collisions over the period, 175 of them serious or fatal. Serious injury concentrates in Islington, Haringey, Camden, with 2 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 20 mph sections. The worst year of the period was 2022 with 44 serious collisions, and the count is down 15% between 2021 and 2025.
Every serious and fatal collision on the A503
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
- Islington57 KSI
- Haringey38 KSI
- Camden34 KSI
- Waltham Forest24 KSI
- Hackney22 KSI
Local authority areas with the most serious collisions on this road.
The trend
Serious and fatal collisions on the A503
2025: 33 (down 0% on the year before) · peak 44 in 2022 · -15.4% across the period
Axis clipped to the data range to show year-on-year movement.
About the A503
How many accidents happen on the A503?
Police recorded 989 injury collisions on the A503 over 2021–2025, of which 175 were fatal or serious. Those serious collisions left 182 people killed or seriously injured, including 4 fatal collisions.
Is the A503 a dangerous road?
By volume of serious injury it ranks 52 of the 150 numbered roads we analyse, and 46 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 A503 do collisions happen?
They concentrate in Islington, Haringey, Camden. 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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