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CrashStats

A404 accidents: crash map and statistics

Police recorded 19,634 collisions on the A404 from 1979 to 2025, with 24,292 casualties. Of those crashes, 220 were fatal and 3,208 serious, and 233 people were killed.

In 2025 there were 247 collisions on the A404, up 3% from 240 in 2024, with 289 casualties.

Live A404 closures, incidents and roadworks are checked every 5 minutes.

Collisions since 1979
19,634
34th highest of 4,923 roads
Casualties
24,292
1.24 per collision
Fatal collisions
220
233 people killed
Serious collisions
3,208
3,572 seriously injured
Collisions in 2025
247
Up 3% on 2024
Casualties in 2025
289
Up 2% on 2024

Crash severity on the A404

On the A404, 1.1% of collisions were fatal and 16% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal2201.1%
  • Serious3,20816%
  • Slight16,20683%

Where the A404 ranks among 4,923 roads

Most collisions
34th
Most casualties
41st
Most fatal collisions
76th
Most serious collisions
36th

A404 accidents by year

Collisions on the A404 peaked at 665 in 1982 and were down to 247 in 2025.

Collisions and casualties on the A404, 1979 to 2025

  • Collisions
  • Collisions in 2025: 247
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025247289
2024240282
2023255296
2022307361
2021240274
2020250287
2019284330
2018294376
2017286365
2016314381
2015322407
2014317387
2013276338
2012296369
2011268346
2010289354
2009307371
2008287357
2007306376
2006342433
2005341442
2004443531
2003443568
2002480602
2001494623
2000546709
1999510647
1998483609
1997514647
1996503631
1995461590
1994549685
1993515651
1992460586
1991470586
1990506608
1989525645
1988527655
1987544641
1986559691
1985536660
1984584750
1983616736
1982665842
1981553675
1980540632
1979540671

When crashes happen on the A404

Friday has the most collisions on the A404 (3,340), and 3pm to 6pm is the busiest time of day (4,396).

Collisions by day of the week

  • Monday2,724 (14%)
  • Tuesday2,909 (15%)
  • Wednesday2,934 (15%)
  • Thursday2,942 (15%)
  • Friday3,340 (17%)
  • Saturday2,672 (14%)
  • Sunday2,113 (11%)

Collisions by time of day

  • Midnight to 3am795 (4%)
  • 3am to 6am380 (1.9%)
  • 6am to 9am2,365 (12%)
  • 9am to noon2,818 (14%)
  • Noon to 3pm3,301 (17%)
  • 3pm to 6pm4,396 (22%)
  • 6pm to 9pm3,291 (17%)
  • 9pm to midnight2,288 (12%)

Collisions by month

  • January1,536 (7.8%)
  • February1,363 (6.9%)
  • March1,587 (8.1%)
  • April1,515 (7.7%)
  • May1,614 (8.2%)
  • June1,628 (8.3%)
  • July1,750 (8.9%)
  • August1,610 (8.2%)
  • September1,748 (8.9%)
  • October1,874 (9.5%)
  • November1,828 (9.3%)
  • December1,581 (8.1%)

Light conditions at the time

  • Daylight13,462 (69%)
  • Dark, street lights lit5,590 (28%)
  • Dark, no street lighting357 (1.8%)
  • Dark, lighting unknown141 (0.7%)
  • Dark, street lights unlit84 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A404 crashes

On the A404, 80% of collisions happened where the speed limit was 30 mph and 73% on a dry road surface.

Speed limit at the scene

  • 20 mph450 (2.3%)
  • 30 mph15,731 (80%)
  • 40 mph1,631 (8.3%)
  • 50 mph154 (0.8%)
  • 60 mph911 (4.6%)
  • 70 mph756 (3.9%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds14,932 (76%)
  • Raining, no high winds2,576 (13%)
  • Fine with high winds160 (0.8%)
  • Raining with high winds126 (0.6%)
  • Other1,531 (7.8%)
  • Not recorded309 (1.6%)

Road surface

  • Dry14,343 (73%)
  • Wet or damp4,909 (25%)
  • Frost or ice153 (0.8%)
  • Snow76 (0.4%)
  • Other19 (0.1%)
  • Not recorded134 (0.7%)

Type of road

  • Single carriageway13,778 (70%)
  • Dual carriageway2,858 (15%)
  • Roundabout1,305 (6.6%)
  • One way street or slip road776 (4%)
  • Not recorded917 (4.7%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A404 crashes

Car occupants make up 50% of the people killed or injured on the A404, followed by pedestrians (19%).

Casualties by road user

  • Car occupant12,097 (50%)
  • Pedestrian4,548 (19%)
  • Motorcyclist3,770 (16%)
  • Cyclist1,903 (7.8%)
  • Bus or coach occupant1,049 (4.3%)
  • Van occupant492 (2%)
  • Other419 (1.7%)
  • Not recorded14 (0.1%)

Vehicles involved

  • Car24,682 (70%)
  • Motorcycle4,096 (12%)
  • Pedal cycle1,962 (5.6%)
  • Van or goods vehicle up to 3.5 tonnes1,783 (5.1%)
  • Bus or coach1,305 (3.7%)
  • Goods vehicle over 3.5 tonnes679 (1.9%)
  • Other679 (1.9%)
  • Not recorded28 (0.1%)

Casualties by age

  • 0 to 5401 (1.7%)
  • 6 to 10620 (2.6%)
  • 11 to 151,006 (4.1%)
  • 16 to 203,231 (13%)
  • 21 to 253,529 (15%)
  • 26 to 355,319 (22%)
  • 36 to 453,454 (14%)
  • 46 to 552,395 (9.9%)
  • 56 to 651,519 (6.3%)
  • 66 to 75947 (3.9%)
  • Over 75686 (2.8%)
  • Not recorded1,185 (4.9%)

Drivers, passengers and pedestrians

  • Driver or rider14,343 (59%)
  • Passenger5,401 (22%)
  • Pedestrian4,548 (19%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A404

Map of the 25 most recent crashes on the A404

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 25 crashes
  • Serious
  • Slight

A404 crashes by council area

Collisions on the A404 were recorded in 9 council areas. Brent has the most, with 8,214, followed by Westminster (3,326) and Buckinghamshire (3,075).

Collisions on the A404 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBrent8,2149,792711,237
2ndWestminster3,3263,82031593
3rdBuckinghamshire3,0754,23365516
4thHarrow2,3512,84316355
5thThree Rivers1,0641,54715194
6thHillingdon8861,1278182
7thWindsor and Maidenhead4556111076
8thKensington and Chelsea219268447
9thHammersmith and Fulham303106

A404 crashes by town

Collisions on the A404 were recorded in 12 towns and built-up areas, led by Brent (7,115) and City of Westminster (2,887).

Recent crashes on the A404

These are the 25 most recent collisions on the A404, from 13 November to 17 December 2025.

Severity