Road
Crashes on the A405
774 recorded collisions since 2000.
774
All crashes
7
Fatal
98
Serious
669
Slight
Since 2000 the A405 has seen 774 collisions, 7 of them fatal and 98 serious. That ranks it 637th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 9 per 1,000 collisions, and 14% caused death or serious injury. Collisions have fallen by about 67% since 2000, from 45 to 15 in 2024. The heaviest local concentrations are in St Albans, Watford and Three Rivers.
Worst local authorities on the A405
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Crashes by year
2000–20246040200
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.