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CrashStats

SL1 road accidents: crash map and statistics

Police recorded 12,756 road traffic collisions in the SL1 postcode district, Slough, from 1979 to 2025, and 16,405 people were killed or injured in them. Of those collisions, 130 were fatal and 1,732 were serious.

In 2025 police recorded 141 collisions, up 12% on 2024 (126).

Collisions since 1979
12,756
15th highest of 2,813 postcode districts
Casualties
16,405
1.29 per collision
Fatal collisions
130
134 people killed
Serious collisions
1,732
1,920 seriously injured
Collisions in 2025
141
Up 12% on 2024
Casualties in 2025
180
Up 29% on 2024

Road collision statistics for SL1

Collisions by severity, 1979 to 2025

  • Fatal1301%
  • Serious1,73214%
  • Slight10,89485%

What the data shows

  • SL1 had 1,567 collisions from 2016 to 2025, 40% fewer than the 2,607 from 2006 to 2015.
  • 15% of collisions in SL1 were fatal or serious, against 20% across Great Britain.
  • 1,847 children under 16 were killed or injured in SL1, 12% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 29% of collisions in SL1.

Where SL1 ranks among 2,813 postcode districts

Most collisions
15th
Most casualties
15th
Most fatal collisions
124th
Most serious collisions
48th

Collisions by day of the week

  • Monday1,780 (14%)
  • Tuesday1,943 (15%)
  • Wednesday1,906 (15%)
  • Thursday1,958 (15%)
  • Friday2,226 (17%)
  • Saturday1,705 (13%)
  • Sunday1,238 (9.7%)

Light conditions

  • Daylight8,944 (70%)
  • Dark, street lights lit3,467 (27%)
  • Dark, no street lighting187 (1.5%)
  • Dark, lighting unknown100 (0.8%)
  • Dark, street lights unlit55 (0.4%)
  • Not recorded3 (under 0.1%)

Type of road

  • Single carriageway7,752 (61%)
  • Dual carriageway3,482 (27%)
  • Roundabout1,138 (8.9%)
  • One way street or slip road376 (2.9%)
  • Not recorded8 (0.1%)

Speed limit at the scene

  • 20 mph85 (0.7%)
  • 30 mph9,018 (71%)
  • 40 mph1,542 (12%)
  • 50 mph53 (0.4%)
  • 60 mph751 (5.9%)
  • 70 mph1,305 (10%)
  • Not recorded2 (under 0.1%)

Weather at the time

  • Fine, no high winds10,480 (82%)
  • Raining, no high winds1,478 (12%)
  • Fine with high winds149 (1.2%)
  • Raining with high winds136 (1.1%)
  • Fog or mist39 (0.3%)
  • Snowing, no high winds33 (0.3%)
  • Snowing with high winds6 (under 0.1%)
  • Other316 (2.5%)
  • Not recorded119 (0.9%)

Who was hurt

  • Car occupant9,783 (60%)
  • Pedestrian2,362 (14%)
  • Motorcyclist1,827 (11%)
  • Cyclist1,637 (10%)
  • Van occupant276 (1.7%)
  • Bus or coach occupant163 (1%)
  • Taxi or private hire car occupant144 (0.9%)
  • Goods vehicle occupant (over 3.5 tonnes)87 (0.5%)
  • Minibus occupant57 (0.3%)
  • Other vehicle occupant45 (0.3%)
  • Other6 (under 0.1%)
  • Not recorded18 (0.1%)

Source: Department for Transport, STATS19 road safety data

SL1 road accidents by year

Collisions and casualties in SL1, 1979 to 2025

Collisions in SL1 peaked at 364 in 1987; 2025 had 141.

  • Collisions
  • Collisions in 2025: 141
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025141180
2024126139
2023146167
2022137181
2021145166
2020119151
2019159191
2018156207
2017208274
2016230295
2015240306
2014243321
2013246343
2012250323
2011260336
2010263366
2009258340
2008288357
2007268352
2006291413
2005307374
2004280357
2003325443
2002345439
2001329436
2000343428
1999291377
1998321396
1997333438
1996300383
1995319418
1994311386
1993277349
1992282371
1991302392
1990310425
1989361464
1988328422
1987364462
1986309394
1985346431
1984362465
1983338418
1982303383
1981314381
1980286368
1979296397

Map of recent crashes in SL1

Map of the 24 most recent crashes in SL1

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SL1

The 24 most recent collisions in SL1 happened between 9 November and 30 December 2025.

Severity

Crashes by road in SL1

The A4 has the most collisions in SL1, 3,213 of 12,756 (25%), followed by the A355 (1,513).

Collisions in SL1 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA43,2134,18429433
2ndA3551,5131,93513178
3rdM41,1431,71027141
4thA332427555364
5thA412230288128
6thB3027154188020
7thB416739105
8thB3763142010
9thA322243008
10thA3355701
11thB30223400

Council areas covering SL1

Collisions in SL1 were recorded in 3 council areas. Slough has 11,586 of 12,756 (91%).

Collisions in SL1 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stSlough11,58614,8261041,514
2ndBuckinghamshire1,1271,51926214
3rdWindsor and Maidenhead425804

Towns in SL1

Collisions in SL1 were recorded in 2 towns, led by Slough (10,518) and Eton (6).