Road
Crashes on the A4178
240 recorded collisions since 2000.
240
All crashes
3
Fatal
31
Serious
206
Slight
Since 2000 the A4178 has seen 240 collisions, 3 of them fatal and 31 serious. That ranks it 1815th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 12.5 per 1,000 collisions, and 14% caused death or serious injury. Collisions have fallen by about 57% since 2000, from 14 to 6 in 2024. The heaviest local concentrations are in Watford and Three Rivers.
Worst local authorities on the A4178
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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.