Road
Crashes on the B656
550 recorded collisions since 2000.
550
All crashes
9
Fatal
96
Serious
445
Slight
Since 2000 the B656 has seen 550 collisions, 9 of them fatal and 96 serious. That ranks it 873rd of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 16.4 per 1,000 collisions, and 19% caused death or serious injury. Collisions have fallen by about 17% since 2000, from 18 to 15 in 2024. The heaviest local concentrations are in North Hertfordshire and Welwyn Hatfield.
Worst local authorities on the B656
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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.