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CrashStats

UB4 road accidents: crash map and statistics

Police recorded 5,208 road traffic collisions in the UB4 postcode district, Hillingdon, from 1979 to 2025, and 6,453 people were killed or injured in them. Of those collisions, 45 were fatal and 732 were serious.

In 2025 police recorded 88 collisions, down 4% on 2024 (92).

Collisions since 1979
5,208
501st highest of 2,813 postcode districts
Casualties
6,453
1.24 per collision
Fatal collisions
45
46 people killed
Serious collisions
732
797 seriously injured
Collisions in 2025
88
Down 4% on 2024
Casualties in 2025
92
Down 16% on 2024

Road collision statistics for UB4

Collisions by severity, 1979 to 2025

  • Fatal450.9%
  • Serious73214%
  • Slight4,43185%

What the data shows

  • UB4 had 876 collisions from 2016 to 2025, 16% fewer than the 1,042 from 2006 to 2015.
  • 15% of collisions in UB4 were fatal or serious, against 20% across Great Britain.
  • 851 children under 16 were killed or injured in UB4, 14% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 25% of collisions in UB4.

Where UB4 ranks among 2,813 postcode districts

Most collisions
501st
Most casualties
599th
Most fatal collisions
1,348th
Most serious collisions
885th

Collisions by day of the week

  • Monday775 (15%)
  • Tuesday747 (14%)
  • Wednesday698 (13%)
  • Thursday759 (15%)
  • Friday881 (17%)
  • Saturday744 (14%)
  • Sunday604 (12%)

Light conditions

  • Daylight3,662 (70%)
  • Dark, street lights lit1,474 (28%)
  • Dark, lighting unknown49 (0.9%)
  • Dark, street lights unlit13 (0.2%)
  • Dark, no street lighting10 (0.2%)

Type of road

  • Single carriageway2,807 (54%)
  • Dual carriageway1,734 (33%)
  • Roundabout473 (9.1%)
  • One way street or slip road135 (2.6%)
  • Not recorded59 (1.1%)

Speed limit at the scene

  • 20 mph82 (1.6%)
  • 30 mph3,183 (61%)
  • 40 mph1,775 (34%)
  • 50 mph162 (3.1%)
  • 60 mph5 (0.1%)
  • 70 mph1 (under 0.1%)

Weather at the time

  • Fine, no high winds4,328 (83%)
  • Raining, no high winds615 (12%)
  • Fine with high winds39 (0.7%)
  • Raining with high winds32 (0.6%)
  • Snowing, no high winds19 (0.4%)
  • Fog or mist18 (0.3%)
  • Snowing with high winds3 (0.1%)
  • Other85 (1.6%)
  • Not recorded69 (1.3%)

Who was hurt

  • Car occupant3,787 (59%)
  • Pedestrian1,060 (16%)
  • Motorcyclist635 (9.8%)
  • Cyclist507 (7.9%)
  • Bus or coach occupant228 (3.5%)
  • Van occupant148 (2.3%)
  • Taxi or private hire car occupant51 (0.8%)
  • Other vehicle occupant13 (0.2%)
  • Goods vehicle occupant (over 3.5 tonnes)12 (0.2%)
  • E-scooter or powered transporter user2 (under 0.1%)
  • Other2 (under 0.1%)
  • Not recorded8 (0.1%)

Source: Department for Transport, STATS19 road safety data

UB4 road accidents by year

Collisions and casualties in UB4, 1979 to 2025

Collisions in UB4 peaked at 176 in 1984; 2025 had 88.

  • Collisions
  • Collisions in 2025: 88
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20258892
202492109
202382100
2022106134
20215869
20207393
201979101
201897123
2017118161
201683103
2015116163
201496122
201382112
2012112147
2011126152
2010126159
200997119
20088099
2007106143
2006101121
200596132
2004143173
2003129171
2002144187
2001143179
2000123154
1999125157
1998136157
1997131151
1996130156
1995140165
1994134175
1993126155
1992115141
1991139150
1990139177
1989135158
1988144175
1987149187
1986137168
1985167205
1984176215
1983153177
1982135165
198100
198000
197911

Map of recent crashes in UB4

Map of the 24 most recent crashes in UB4

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in UB4

The 24 most recent collisions in UB4 happened between 1 October and 24 December 2025.

Severity

Crashes by road in UB4

The A4020 has the most collisions in UB4, 1,999 of 5,208 (38%), followed by the A312 (919).

Collisions in UB4 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA40201,9992,48722304
2ndA3129191,178899

Council areas covering UB4

Collisions in UB4 were recorded in 2 council areas. Hillingdon has 5,155 of 5,208 (99%).

Collisions in UB4 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stHillingdon5,1556,39045725
2ndEaling516107

Towns in UB4

Collisions in UB4 were recorded in 2 towns, led by Hillingdon (4,315) and Ealing (7).