Road
Crashes on the A411
1,712 recorded collisions since 2000.
1,712
All crashes
11
Fatal
241
Serious
1,460
Slight
Since 2000 the A411 has seen 1,712 collisions, 11 of them fatal and 241 serious. That ranks it 266th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 6.4 per 1,000 collisions, and 15% caused death or serious injury. Collisions have fallen by about 58% since 2000, from 114 to 48 in 2024. The heaviest local concentrations are in Watford, Hertsmere and Barnet.
Worst local authorities on the A411
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Crashes by year
2000–2024150100500
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.