Road
Crashes on the A400
3,855 recorded collisions since 2000.
3,855
All crashes
20
Fatal
585
Serious
3,250
Slight
Since 2000 the A400 has seen 3,855 collisions, 20 of them fatal and 585 serious. That ranks it 92nd of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 5.2 per 1,000 collisions, and 16% caused death or serious injury. Collisions have fallen by about 60% since 2000, from 255 to 102 in 2024. The heaviest local concentrations are in Camden, Westminster and Islington.
Worst local authorities on the A400
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Crashes by year
2000–20244002000
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.