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CrashStats

SL0 road accidents: crash map and statistics

Police recorded 3,773 road traffic collisions in the SL0 postcode district, Buckinghamshire, from 1979 to 2025, and 5,593 people were killed or injured in them. Of those collisions, 72 were fatal and 534 were serious.

In 2025 police recorded 39 collisions, up 63% on 2024 (24).

Collisions since 1979
3,773
965th highest of 2,813 postcode districts
Casualties
5,593
1.48 per collision
Fatal collisions
72
87 people killed
Serious collisions
534
696 seriously injured
Collisions in 2025
39
Up 63% on 2024
Casualties in 2025
50
Up 67% on 2024

Road collision statistics for SL0

Collisions by severity, 1979 to 2025

  • Fatal721.9%
  • Serious53414%
  • Slight3,16784%

What the data shows

  • SL0 had 371 collisions from 2016 to 2025, 58% fewer than the 888 from 2006 to 2015.
  • 16% of collisions in SL0 were fatal or serious, against 20% across Great Britain.
  • 383 children under 16 were killed or injured in SL0, 7% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 33% of collisions in SL0.

Where SL0 ranks among 2,813 postcode districts

Most collisions
965th
Most casualties
808th
Most fatal collisions
639th
Most serious collisions
1,398th

Collisions by day of the week

  • Monday511 (14%)
  • Tuesday503 (13%)
  • Wednesday529 (14%)
  • Thursday537 (14%)
  • Friday707 (19%)
  • Saturday488 (13%)
  • Sunday498 (13%)

Light conditions

  • Daylight2,669 (71%)
  • Dark, street lights lit795 (21%)
  • Dark, no street lighting221 (5.9%)
  • Dark, lighting unknown65 (1.7%)
  • Dark, street lights unlit20 (0.5%)
  • Not recorded3 (0.1%)

Type of road

  • Dual carriageway1,867 (49%)
  • Single carriageway1,492 (40%)
  • Roundabout213 (5.6%)
  • One way street or slip road181 (4.8%)
  • Not recorded20 (0.5%)

Speed limit at the scene

  • 30 mph749 (20%)
  • 40 mph319 (8.5%)
  • 50 mph94 (2.5%)
  • 60 mph613 (16%)
  • 70 mph1,996 (53%)
  • Not recorded2 (0.1%)

Weather at the time

  • Fine, no high winds3,008 (80%)
  • Raining, no high winds475 (13%)
  • Fine with high winds47 (1.2%)
  • Raining with high winds45 (1.2%)
  • Fog or mist35 (0.9%)
  • Snowing, no high winds13 (0.3%)
  • Snowing with high winds2 (0.1%)
  • Other95 (2.5%)
  • Not recorded53 (1.4%)

Who was hurt

  • Car occupant4,120 (74%)
  • Motorcyclist434 (7.8%)
  • Van occupant236 (4.2%)
  • Pedestrian218 (3.9%)
  • Goods vehicle occupant (over 3.5 tonnes)176 (3.1%)
  • Cyclist165 (3%)
  • Bus or coach occupant143 (2.6%)
  • Minibus occupant42 (0.8%)
  • Taxi or private hire car occupant39 (0.7%)
  • Other vehicle occupant18 (0.3%)
  • Other2 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

SL0 road accidents by year

Collisions and casualties in SL0, 1979 to 2025

Collisions in SL0 peaked at 131 in 1997; 2025 had 39.

  • Collisions
  • Collisions in 2025: 39
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253950
20242430
20233347
20223843
20212227
20202331
20194365
20185167
20173851
201660101
201561108
201487148
201381117
201283139
201183128
201099142
200993145
200894147
2007117246
200690129
2005122165
200494133
2003106145
2002129213
2001126189
2000122171
1999120155
199895134
1997131206
1996100140
199579105
1994111166
1993115184
199291133
199180112
199097155
198993138
1988100138
198794150
198668102
198577106
198476105
198376110
19825474
19816088
19804452
19795463

Map of recent crashes in SL0

Map of the 24 most recent crashes in SL0

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SL0

The 24 most recent collisions in SL0 happened between 3 June and 16 December 2025.

Severity

Crashes by road in SL0

The M25 has the most collisions in SL0, 1,208 of 3,773 (32%), followed by the M4 (649).

Collisions in SL0 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stM251,2081,84714126
2ndM46491,152948
3rdA412461635997
4thB470325430871
5thA4007201261634
6thM40105139312

Council areas covering SL0

Collisions in SL0 were recorded in 4 council areas. Buckinghamshire has 3,200 of 3,773 (85%).

Collisions in SL0 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stBuckinghamshire3,2004,63768486
2ndSlough550927441
3rdHillingdon202505
4thHavering3402

Towns in SL0

Collisions in SL0 were recorded in 4 towns, led by Iver Heath (525) and Iver (345).