Road
Crashes on the A4251
737 recorded collisions since 2000.
737
All crashes
11
Fatal
128
Serious
598
Slight
Since 2000 the A4251 has seen 737 collisions, 11 of them fatal and 128 serious. That ranks it 664th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 14.9 per 1,000 collisions, and 19% caused death or serious injury. Collisions have fallen by about 66% since 2000, from 56 to 19 in 2024. The heaviest local concentrations are in Dacorum, Hertsmere and North Hertfordshire.
Worst local authorities on the A4251
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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.