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CrashStats

SL6 road accidents: crash map and statistics

Police recorded 11,736 road traffic collisions in the SL6 postcode district, Windsor and Maidenhead, from 1979 to 2025, and 15,272 people were killed or injured in them. Of those collisions, 180 were fatal and 1,847 were serious.

In 2025 police recorded 88 collisions, up 22% on 2024 (72).

Collisions since 1979
11,736
25th highest of 2,813 postcode districts
Casualties
15,272
1.30 per collision
Fatal collisions
180
207 people killed
Serious collisions
1,847
2,132 seriously injured
Collisions in 2025
88
Up 22% on 2024
Casualties in 2025
108
Up 23% on 2024

Road collision statistics for SL6

Collisions by severity, 1979 to 2025

  • Fatal1801.5%
  • Serious1,84716%
  • Slight9,70983%

What the data shows

  • SL6 had 1,074 collisions from 2016 to 2025, 48% fewer than the 2,079 from 2006 to 2015.
  • 17% of collisions in SL6 were fatal or serious, against 20% across Great Britain.
  • 1,448 children under 16 were killed or injured in SL6, 9.8% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 33% of collisions in SL6.

Where SL6 ranks among 2,813 postcode districts

Most collisions
25th
Most casualties
22nd
Most fatal collisions
28th
Most serious collisions
31st

Collisions by day of the week

  • Monday1,711 (15%)
  • Tuesday1,739 (15%)
  • Wednesday1,769 (15%)
  • Thursday1,720 (15%)
  • Friday2,027 (17%)
  • Saturday1,504 (13%)
  • Sunday1,266 (11%)

Light conditions

  • Daylight8,257 (70%)
  • Dark, street lights lit2,284 (19%)
  • Dark, no street lighting1,029 (8.8%)
  • Dark, lighting unknown121 (1%)
  • Dark, street lights unlit42 (0.4%)
  • Not recorded3 (under 0.1%)

Type of road

  • Single carriageway8,127 (69%)
  • Dual carriageway1,972 (17%)
  • Roundabout1,325 (11%)
  • One way street or slip road302 (2.6%)
  • Not recorded10 (0.1%)

Speed limit at the scene

  • 20 mph49 (0.4%)
  • 30 mph5,598 (48%)
  • 40 mph1,836 (16%)
  • 50 mph554 (4.7%)
  • 60 mph1,965 (17%)
  • 70 mph1,732 (15%)
  • Not recorded2 (under 0.1%)

Weather at the time

  • Fine, no high winds9,457 (81%)
  • Raining, no high winds1,390 (12%)
  • Raining with high winds151 (1.3%)
  • Fine with high winds146 (1.2%)
  • Fog or mist106 (0.9%)
  • Snowing, no high winds42 (0.4%)
  • Snowing with high winds6 (0.1%)
  • Other342 (2.9%)
  • Not recorded96 (0.8%)

Who was hurt

  • Car occupant9,481 (62%)
  • Motorcyclist2,172 (14%)
  • Cyclist1,537 (10%)
  • Pedestrian1,343 (8.8%)
  • Van occupant390 (2.6%)
  • Goods vehicle occupant (over 3.5 tonnes)115 (0.8%)
  • Taxi or private hire car occupant81 (0.5%)
  • Other vehicle occupant51 (0.3%)
  • Bus or coach occupant50 (0.3%)
  • Minibus occupant43 (0.3%)
  • Other8 (0.1%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

SL6 road accidents by year

Collisions and casualties in SL6, 1979 to 2025

Collisions in SL6 peaked at 409 in 1986; 2025 had 88.

  • Collisions
  • Collisions in 2025: 88
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202588108
20247288
20237783
2022104122
202196121
20207488
2019119133
2018118159
2017146189
2016180214
2015186230
2014187242
2013181240
2012206264
2011202273
2010185243
2009198272
2008237309
2007238335
2006259315
2005197257
2004258338
2003257335
2002265335
2001314422
2000288357
1999324411
1998329451
1997313440
1996306419
1995311396
1994307410
1993267348
1992289388
1991292385
1990307408
1989341441
1988339452
1987337433
1986409540
1985393490
1984387505
1983369479
1982372472
1981355460
1980320416
1979337456

Map of recent crashes in SL6

Map of the 24 most recent crashes in SL6

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SL6

The 24 most recent collisions in SL6 happened between 13 September and 19 December 2025.

Severity

Crashes by road in SL6

The A4 has the most collisions in SL6, 2,253 of 11,736 (19%), followed by the A308 (1,390).

Collisions in SL6 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA42,2532,81020344
2ndA3081,3901,79022218
3rdM41,2061,81435152
4thB44475717101297
5thA330441632778
6thA4094240330437
7thA308(M)223272214
8thA4232173591461
9thB3024208278144
10thA404(M)205298523
11thA4130184255232
12thA404167240229
13thB3028145171323
14thB30237286114
15thA423(M)597626
16thB30265384412
17thM404600
18thA40493301

Council areas covering SL6

Collisions in SL6 were recorded in 4 council areas. Windsor and Maidenhead has 10,311 of 11,736 (88%).

Collisions in SL6 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead10,31113,3421661,598
2ndBuckinghamshire1,2731,72412228
3rdSlough147201221
4thWest Berkshire3300

Towns in SL6

Collisions in SL6 were recorded in 4 towns, led by Maidenhead (5,780) and Slough (359).