Skip to main content
CrashStats

HA4 road accidents: crash map and statistics

Police recorded 6,229 road traffic collisions in the HA4 postcode district, Hillingdon, from 1981 to 2025, and 7,693 people were killed or injured in them. Of those collisions, 55 were fatal and 941 were serious.

In 2025 police recorded 87 collisions, down 8% on 2024 (95).

Collisions since 1981
6,229
289th highest of 2,813 postcode districts
Casualties
7,693
1.24 per collision
Fatal collisions
55
60 people killed
Serious collisions
941
1,038 seriously injured
Collisions in 2025
87
Down 8% on 2024
Casualties in 2025
119
Up 10% on 2024

Road collision statistics for HA4

Collisions by severity, 1981 to 2025

  • Fatal550.9%
  • Serious94115%
  • Slight5,23384%

What the data shows

  • HA4 had 874 collisions from 2016 to 2025, 12% fewer than the 997 from 2006 to 2015.
  • 16% of collisions in HA4 were fatal or serious, against 20% across Great Britain.
  • 824 children under 16 were killed or injured in HA4, 11% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 26% of collisions in HA4.

Where HA4 ranks among 2,813 postcode districts

Most collisions
289th
Most casualties
353rd
Most fatal collisions
1,050th
Most serious collisions
477th

Collisions by day of the week

  • Monday912 (15%)
  • Tuesday930 (15%)
  • Wednesday946 (15%)
  • Thursday924 (15%)
  • Friday979 (16%)
  • Saturday851 (14%)
  • Sunday687 (11%)

Light conditions

  • Daylight4,285 (69%)
  • Dark, street lights lit1,831 (29%)
  • Dark, lighting unknown66 (1.1%)
  • Dark, street lights unlit29 (0.5%)
  • Dark, no street lighting18 (0.3%)

Type of road

  • Single carriageway4,997 (80%)
  • Dual carriageway608 (9.8%)
  • Roundabout479 (7.7%)
  • One way street or slip road79 (1.3%)
  • Not recorded66 (1.1%)

Speed limit at the scene

  • 20 mph59 (0.9%)
  • 30 mph5,612 (90%)
  • 40 mph241 (3.9%)
  • 50 mph89 (1.4%)
  • 60 mph50 (0.8%)
  • 70 mph178 (2.9%)

Weather at the time

  • Fine, no high winds5,123 (82%)
  • Raining, no high winds808 (13%)
  • Fine with high winds47 (0.8%)
  • Raining with high winds29 (0.5%)
  • Fog or mist27 (0.4%)
  • Snowing, no high winds20 (0.3%)
  • Snowing with high winds4 (0.1%)
  • Other95 (1.5%)
  • Not recorded76 (1.2%)

Who was hurt

  • Car occupant4,500 (58%)
  • Pedestrian1,132 (15%)
  • Motorcyclist1,036 (13%)
  • Cyclist612 (8%)
  • Van occupant198 (2.6%)
  • Bus or coach occupant107 (1.4%)
  • Goods vehicle occupant (over 3.5 tonnes)37 (0.5%)
  • Taxi or private hire car occupant33 (0.4%)
  • Other vehicle occupant26 (0.3%)
  • Minibus occupant6 (0.1%)
  • Other3 (under 0.1%)
  • Not recorded3 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

HA4 road accidents by year

Collisions and casualties in HA4, 1981 to 2025

Collisions in HA4 peaked at 223 in 1982; 2025 had 87.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202587119
202495108
20237690
202293103
20217290
20207688
201984111
201896117
2017103125
201692114
201583102
201484106
20136985
2012105132
2011100123
2010131164
2009102140
2008104122
2007106138
2006113133
2005162206
2004151181
2003155192
2002163199
2001171226
2000160203
1999139165
1998180237
1997186221
1996179205
1995205256
1994176218
1993195232
1992151176
1991184228
1990186234
1989217265
1988185253
1987210258
1986193228
1985187232
1984210264
1983189227
1982223276
198111

Map of recent crashes in HA4

Map of the 24 most recent crashes in HA4

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in HA4

The 24 most recent collisions in HA4 happened between 17 September and 24 December 2025.

Severity

Crashes by road in HA4

The A4180 has the most collisions in HA4, 1,202 of 6,229 (19%), followed by the B466 (651).

Collisions in HA4 on each road, 1981 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA41801,2021,4849159
2ndB466651809585
3rdA405317101277
4thB455417504379

Council areas covering HA4

Collisions in HA4 were recorded in 3 council areas. Hillingdon has 6,213 of 6,229 (99.7%).

Collisions in HA4 by council area, 1981 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stHillingdon6,2137,67754935
2ndHarrow9913
3rdEaling4401

Town in HA4

Of the 6,229 collisions in HA4, 5,311 (85%) were in Hillingdon.