Crashes on the A355

1,455 recorded collisions since 2000.

Since 2000 the A355 has seen 1,455 collisions, 25 of them fatal and 181 serious. That ranks it 326th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 17.2 per 1,000 collisions, and 14% caused death or serious injury. Collisions have fallen by about 60% since 2000, from 80 to 32 in 2024. The heaviest local concentrations are in Slough, Buckinghamshire and Windsor and Maidenhead.

Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.