Road
Crashes on the A4
20,002 recorded collisions since 2000.
20,002
All crashes
233
Fatal
2,722
Serious
17,047
Slight
Since 2000 the A4 has seen 20,002 collisions, 233 of them fatal and 2,722 serious. That ranks it 6th of 6,754 numbered A, B and M roads by total recorded collisions. Its fatal rate is 11.6 per 1,000 collisions, and 15% caused death or serious injury. Collisions have fallen by about 64% since 2000, from 1,304 to 474 in 2024. The heaviest local concentrations are in Westminster, Hounslow and Slough.
Worst local authorities on the A4
Select a local authority for its full profile.
- Westminster3,792 crashes · 17 fatal
- Hounslow3,129 crashes · 39 fatal
- Slough2,139 crashes · 15 fatal
- Bristol, City of1,883 crashes · 28 fatal
- Kensington and Chelsea1,620 crashes · 16 fatal
- West Berkshire1,362 crashes · 31 fatal
- Wiltshire1,291 crashes · 38 fatal
- Bath and North East Somerset993 crashes · 8 fatal
- Reading951 crashes · 7 fatal
- Hammersmith and Fulham679 crashes · 15 fatal
Crashes by year
2000–20241,5001,0005000
200020052010201520202024
Figures cover collisions reported to police (STATS19) from 2000 onward. Source: DfT STATS19, Open Government Licence v3.0.