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CrashStats

SL7 road accidents: crash map and statistics

Police recorded 3,147 road traffic collisions in the SL7 postcode district, Buckinghamshire, from 1979 to 2025, and 4,212 people were killed or injured in them. Of those collisions, 71 were fatal and 514 were serious.

In 2025 police recorded 22 collisions, level with 2024.

Collisions since 1979
3,147
1,243rd highest of 2,813 postcode districts
Casualties
4,212
1.34 per collision
Fatal collisions
71
73 people killed
Serious collisions
514
618 seriously injured
Collisions in 2025
22
Level with 2024
Casualties in 2025
23
Down 4% on 2024

Road collision statistics for SL7

Collisions by severity, 1979 to 2025

  • Fatal712.3%
  • Serious51416%
  • Slight2,56281%

What the data shows

  • SL7 had 257 collisions from 2016 to 2025, 56% fewer than the 578 from 2006 to 2015.
  • 19% of collisions in SL7 were fatal or serious, against 20% across Great Britain.
  • 410 children under 16 were killed or injured in SL7, 9.9% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 34% of collisions in SL7.

Where SL7 ranks among 2,813 postcode districts

Most collisions
1,243rd
Most casualties
1,242nd
Most fatal collisions
656th
Most serious collisions
1,446th

Collisions by day of the week

  • Monday449 (14%)
  • Tuesday474 (15%)
  • Wednesday455 (14%)
  • Thursday482 (15%)
  • Friday522 (17%)
  • Saturday410 (13%)
  • Sunday355 (11%)

Light conditions

  • Daylight2,244 (71%)
  • Dark, no street lighting443 (14%)
  • Dark, street lights lit412 (13%)
  • Dark, lighting unknown34 (1.1%)
  • Dark, street lights unlit13 (0.4%)
  • Not recorded1 (under 0.1%)

Type of road

  • Single carriageway2,195 (70%)
  • Dual carriageway562 (18%)
  • Roundabout360 (11%)
  • One way street or slip road20 (0.6%)
  • Not recorded10 (0.3%)

Speed limit at the scene

  • 30 mph1,392 (44%)
  • 40 mph104 (3.3%)
  • 50 mph38 (1.2%)
  • 60 mph1,017 (32%)
  • 70 mph596 (19%)

Weather at the time

  • Fine, no high winds2,541 (81%)
  • Raining, no high winds377 (12%)
  • Raining with high winds39 (1.2%)
  • Fine with high winds34 (1.1%)
  • Fog or mist29 (0.9%)
  • Snowing, no high winds13 (0.4%)
  • Other93 (3%)
  • Not recorded21 (0.7%)

Who was hurt

  • Car occupant2,753 (65%)
  • Motorcyclist459 (11%)
  • Pedestrian415 (9.9%)
  • Cyclist373 (8.9%)
  • Van occupant119 (2.8%)
  • Goods vehicle occupant (over 3.5 tonnes)35 (0.8%)
  • Bus or coach occupant20 (0.5%)
  • Taxi or private hire car occupant20 (0.5%)
  • Minibus occupant14 (0.3%)
  • Other vehicle occupant3 (0.1%)
  • Other1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

SL7 road accidents by year

Collisions and casualties in SL7, 1979 to 2025

Collisions in SL7 peaked at 109 in 1990; 2025 had 22.

  • Collisions
  • Collisions in 2025: 22
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252223
20242224
20232936
20222627
20211820
20201621
20192535
20183546
20172733
20163744
20155779
20144864
20134257
20125977
20115674
20105476
20095475
200881108
20075772
20067098
20056892
20047492
200375102
200279106
200194127
200071101
199988125
199898141
199796117
199696150
199594135
19946787
19937395
199298135
199189118
1990109148
198997133
198892118
19877093
1986100142
1985101123
198495139
198376101
1982106141
19816886
19805361
197985115

Map of recent crashes in SL7

Map of the 24 most recent crashes in SL7

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SL7

The 24 most recent collisions in SL7 happened between 29 November 2024 and 5 December 2025.

Severity

Crashes by road in SL7

The A4155 has the most collisions in SL7, 889 of 3,147 (28%), followed by the A404 (657).

Collisions in SL7 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA41558891,14611151
2ndA40465792627104
3rdB4823004361152
4thA3084965111
5thM40265401
6thA404(M)5600

Council areas covering SL7

Collisions in SL7 were recorded in 2 council areas. Buckinghamshire has 2,702 of 3,147 (86%).

Collisions in SL7 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stBuckinghamshire2,7023,62658435
2ndWindsor and Maidenhead4455861379

Towns in SL7

Collisions in SL7 were recorded in 2 towns, led by Marlow (1,236) and Cookham (6).