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CrashStats

South Bucks road accidents in 2021: crash map and statistics

Police recorded 151 road traffic collisions in South Bucks in 2021, and 200 people were killed or injured in them. Of those collisions, 5 were fatal and 19 were serious.

Collisions were up 24% on 2020 (122), and casualties rose from 152.

Across all years from 1979 to 2025, police recorded 15,877 collisions in South Bucks.

District council until April 2020, now part of Buckinghamshire. Figures follow the old district boundary.

Collisions in 2021
151
Up 24% on 2020
Casualties in 2021
200
Up 32% on 2020
Fatal collisions
5
3.3% of collisions
Serious collisions
19
13% of collisions

Crash severity in South Bucks in 2021

3.3% of collisions in South Bucks in 2021 were fatal and 13% serious, against 2.1% and 17% in South Bucks from 1979 to 2025.

Collisions by worst injury

  • Fatal53.3%
  • Serious1913%
  • Slight12784%

People hurt, by injury

  • Fatal73.5%
  • Serious2312%
  • Slight17085%

South Bucks road accidents by year

Collisions and casualties in South Bucks, 1979 to 2025

Collisions peaked at 492 in 1997. 2021 is highlighted, with 151, up 24% on 2020.

  • Collisions
  • Collisions in 2021: 151
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025157208
2024114144
2023106132
2022148197
2021151200
2020122152
2019175240
2018201271
2017177244
2016215292
2015228312
2014249352
2013271377
2012286425
2011309431
2010318452
2009308440
2008355500
2007375669
2006411587
2005390572
2004392565
2003407549
2002425610
2001444642
2000489697
1999490707
1998458647
1997492704
1996457654
1995370497
1994459645
1993437624
1992416594
1991425604
1990416593
1989463670
1988443621
1987408631
1986379555
1985403578
1984425557
1983385521
1982354483
1981353484
1980246315
1979375519

When and where crashes happen in South Bucks in 2021

Collisions by day of the week

  • Monday28 (19%)
  • Tuesday24 (16%)
  • Wednesday20 (13%)
  • Thursday20 (13%)
  • Friday25 (17%)
  • Saturday19 (13%)
  • Sunday15 (9.9%)

Collisions by time of day

  • 00:00 to 02:592 (1.3%)
  • 03:00 to 05:591 (0.7%)
  • 06:00 to 08:5924 (16%)
  • 09:00 to 11:5921 (14%)
  • 12:00 to 14:5933 (22%)
  • 15:00 to 17:5942 (28%)
  • 18:00 to 20:5915 (9.9%)
  • 21:00 to 23:5913 (8.6%)

Collisions by month

  • January6 (4%)
  • February9 (6%)
  • March8 (5.3%)
  • April15 (9.9%)
  • May12 (7.9%)
  • June12 (7.9%)
  • July13 (8.6%)
  • August14 (9.3%)
  • September20 (13%)
  • October10 (6.6%)
  • November17 (11%)
  • December15 (9.9%)

Light conditions

  • Daylight114 (75%)
  • Dark, street lights lit25 (17%)
  • Dark, no street lighting6 (4%)
  • Dark, lighting unknown5 (3.3%)
  • Dark, street lights unlit1 (0.7%)

Weather at the time

  • Fine, no high winds121 (80%)
  • Raining, no high winds21 (14%)
  • Fog or mist1 (0.7%)
  • Other7 (4.6%)
  • Not recorded1 (0.7%)

Road surface

  • Dry105 (70%)
  • Wet or damp45 (30%)
  • Frost or ice1 (0.7%)

Speed limit at the scene

  • 30 mph43 (28%)
  • 40 mph32 (21%)
  • 50 mph11 (7.3%)
  • 60 mph19 (13%)
  • 70 mph46 (30%)

Type of road

  • Single carriageway77 (51%)
  • Dual carriageway54 (36%)
  • Roundabout18 (12%)
  • One way street or slip road2 (1.3%)

Source: Department for Transport, STATS19 road safety data

Who was hurt in road crashes in South Bucks in 2021

Casualties by road user

  • Car occupant144 (72%)
  • Motorcyclist18 (9%)
  • Pedestrian18 (9%)
  • Cyclist9 (4.5%)
  • Van occupant5 (2.5%)
  • Taxi or private hire car occupant2 (1%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (0.5%)
  • Horse rider1 (0.5%)
  • Not recorded2 (1%)

Casualties by age

  • 0 to 51 (0.5%)
  • 6 to 104 (2%)
  • 11 to 152 (1%)
  • 16 to 2013 (6.5%)
  • 21 to 2530 (15%)
  • 26 to 3544 (22%)
  • 36 to 4532 (16%)
  • 46 to 5531 (16%)
  • 56 to 6518 (9%)
  • 66 to 7519 (9.5%)
  • Over 754 (2%)
  • Not recorded2 (1%)

Drivers, passengers and pedestrians

  • Driver or rider139 (70%)
  • Passenger43 (22%)
  • Pedestrian18 (9%)

Vehicles involved

  • Car229 (74%)
  • Van or goods vehicle up to 3.5 tonnes22 (7.1%)
  • Motorcycle18 (5.8%)
  • Goods vehicle over 3.5 tonnes14 (4.5%)
  • Goods vehicle, weight unknown10 (3.2%)
  • Pedal cycle9 (2.9%)
  • Taxi or private hire car4 (1.3%)
  • Personal powered transporter (e-scooter or similar)2 (0.6%)
  • Ridden horse1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Crash map for South Bucks in 2021

Map of the last 24 crashes of 2021 and the 10 busiest accident hotspots in South Bucks

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

  • 24 crashes
  • Fatal
  • Slight

Accident hotspots (10)

Accident hotspots in South Bucks in 2021

Gerrards Cross & Denham, Buckinghamshire, SL9 7FL area was the busiest accident hotspot in South Bucks in 2021, with 12 collisions.

Roads in South Bucks with the most crashes in 2021

The M25 had the most collisions in South Bucks in 2021: 27, including 3 serious.

Roads ranked by collisions in South Bucks, 2021
RankRoadCollisionsCasualtiesFatalSerious
1stM25273603
2ndA40202312
3rdA412162206
4thM40132413
5thA355111700
6thA481110
7thB41681010
8thA4133311
9thB4703400
10thM43400
11thB4742200
12thA40201100
13thB30261201

Towns in South Bucks: crashes in 2021

Slough had the most collisions of any town in South Bucks in 2021: 12.

Postcode districts in South Bucks: crashes in 2021

SL9 had the most collisions of any postcode district in South Bucks in 2021: 32.

Buckinghamshire and its former districts in 2021

Buckinghamshire recorded 637 collisions in 2021, and 24% of them were in the old South Bucks district.

Other former districts in Buckinghamshire

Latest crashes in South Bucks in 2021

Of the last 24 crashes in South Bucks in 2021, 1 was fatal and none were serious. The last was on 27 December 2021.

Severity

South Bucks road accidents in other years