Road
Crashes on the B156
546 recorded collisions since 2000.
546
All crashes
2
Fatal
80
Serious
464
Slight
Since 2000 the B156 has seen 546 collisions, 2 of them fatal and 80 serious. That ranks it 882nd of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 3.7 per 1,000 collisions, and 15% caused death or serious injury. Collisions have fallen by about 56% since 2000, from 39 to 17 in 2024. The heaviest local concentrations are in Broxbourne, Welwyn Hatfield and Hertsmere.
Worst local authorities on the B156
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Crashes by year
2000–202440200
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.