Road
Crashes on the A409
1,072 recorded collisions since 2000.
1,072
All crashes
7
Fatal
133
Serious
932
Slight
Since 2000 the A409 has seen 1,072 collisions, 7 of them fatal and 133 serious. That ranks it 469th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 6.5 per 1,000 collisions, and 13% caused death or serious injury. Collisions have fallen by about 47% since 2000, from 55 to 29 in 2024. The heaviest local concentrations are in Harrow, Hertsmere and Brent.
Worst local authorities on the A409
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Crashes by year
2000–2024100500
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.