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CrashStats

Chiltern road accidents: crash map and statistics

Police recorded 10,784 road traffic collisions in Chiltern from 1979 to 2025, and 14,569 people were killed or injured in them. Of those collisions, 189 were fatal and 2,209 were serious.

In 2025 police recorded 74 collisions, up 1% on 2024 (73), and casualties fell from 92 to 81.

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

Collisions, 1979 to 2025
10,784
Casualties
14,569
1.35 per collision
Fatal collisions
189
1.8% of collisions
Collisions in 2025
74
Up 1% on 2024

Crash severity in Chiltern

1.8% of collisions in Chiltern from 1979 to 2025 were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by worst injury

  • Fatal1891.8%
  • Serious2,20920%
  • Slight8,38678%

People hurt, by injury

  • Fatal2101.4%
  • Serious2,63218%
  • Slight11,72780%

Chiltern road accidents by year

Collisions and casualties in Chiltern, 1979 to 2025

Collisions peaked at 400 in 1984. In 2025 there were 74, up 1% on 2024.

  • Collisions
  • Collisions in 2025: 74
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20257481
20247392
20238397
202284105
20217789
20207796
2019106134
2018113152
2017112144
2016119161
2015120156
2014139188
2013137199
2012159213
2011144189
2010159239
2009200278
2008190259
2007206273
2006240348
2005251362
2004245334
2003242315
2002256347
2001286392
2000298425
1999295392
1998314433
1997306409
1996303401
1995262380
1994284383
1993296409
1992319417
1991262365
1990304428
1989318431
1988354486
1987303397
1986359476
1985350502
1984400524
1983331430
1982363471
1981351476
1980195248
1979325443

When and where crashes happen in Chiltern

Collisions by day of the week

  • Monday1,497 (14%)
  • Tuesday1,494 (14%)
  • Wednesday1,650 (15%)
  • Thursday1,724 (16%)
  • Friday1,818 (17%)
  • Saturday1,488 (14%)
  • Sunday1,113 (10%)

Collisions by time of day

  • 00:00 to 02:59420 (3.9%)
  • 03:00 to 05:59147 (1.4%)
  • 06:00 to 08:591,696 (16%)
  • 09:00 to 11:591,558 (14%)
  • 12:00 to 14:591,656 (15%)
  • 15:00 to 17:592,476 (23%)
  • 18:00 to 20:591,734 (16%)
  • 21:00 to 23:591,097 (10%)

Collisions by month

  • January898 (8.3%)
  • February768 (7.1%)
  • March867 (8%)
  • April745 (6.9%)
  • May928 (8.6%)
  • June902 (8.4%)
  • July923 (8.6%)
  • August768 (7.1%)
  • September938 (8.7%)
  • October990 (9.2%)
  • November1,091 (10%)
  • December966 (9%)

Light conditions

  • Daylight7,603 (71%)
  • Dark, street lights lit1,574 (15%)
  • Dark, no street lighting1,345 (12%)
  • Dark, lighting unknown197 (1.8%)
  • Dark, street lights unlit60 (0.6%)
  • Not recorded5 (under 0.1%)

Weather at the time

  • Fine, no high winds8,476 (79%)
  • Raining, no high winds1,409 (13%)
  • Raining with high winds136 (1.3%)
  • Fine with high winds130 (1.2%)
  • Fog or mist101 (0.9%)
  • Snowing, no high winds52 (0.5%)
  • Snowing with high winds13 (0.1%)
  • Other350 (3.2%)
  • Not recorded117 (1.1%)

Road surface

  • Dry6,511 (60%)
  • Wet or damp3,750 (35%)
  • Frost or ice368 (3.4%)
  • Snow66 (0.6%)
  • Flood over 3cm deep29 (0.3%)
  • Oil or diesel4 (under 0.1%)
  • Mud3 (under 0.1%)
  • Not recorded53 (0.5%)

Speed limit at the scene

  • 20 mph6 (0.1%)
  • 30 mph5,423 (50%)
  • 40 mph925 (8.6%)
  • 50 mph550 (5.1%)
  • 60 mph3,599 (33%)
  • 70 mph274 (2.5%)
  • Not recorded7 (0.1%)

Type of road

  • Single carriageway9,463 (88%)
  • Roundabout722 (6.7%)
  • Dual carriageway439 (4.1%)
  • One way street or slip road126 (1.2%)
  • Not recorded34 (0.3%)

Source: Department for Transport, STATS19 road safety data

Who is hurt in road crashes in Chiltern

Casualties by road user

  • Car occupant9,410 (65%)
  • Motorcyclist1,804 (12%)
  • Pedestrian1,637 (11%)
  • Cyclist997 (6.8%)
  • Van occupant385 (2.6%)
  • Goods vehicle occupant (over 3.5 tonnes)89 (0.6%)
  • Bus or coach occupant80 (0.5%)
  • Taxi or private hire car occupant58 (0.4%)
  • Other vehicle occupant47 (0.3%)
  • Minibus occupant42 (0.3%)
  • Other19 (0.1%)
  • Not recorded1 (under 0.1%)

Casualties by age

  • 0 to 5255 (1.8%)
  • 6 to 10444 (3%)
  • 11 to 15769 (5.3%)
  • 16 to 203,212 (22%)
  • 21 to 251,958 (13%)
  • 26 to 352,344 (16%)
  • 36 to 451,924 (13%)
  • 46 to 551,344 (9.2%)
  • 56 to 65909 (6.2%)
  • 66 to 75566 (3.9%)
  • Over 75537 (3.7%)
  • Not recorded307 (2.1%)

Drivers, passengers and pedestrians

  • Driver or rider9,713 (67%)
  • Passenger3,219 (22%)
  • Pedestrian1,637 (11%)

Vehicles involved

  • Car15,568 (76%)
  • Motorcycle1,829 (8.9%)
  • Pedal cycle1,041 (5.1%)
  • Van or goods vehicle up to 3.5 tonnes1,016 (4.9%)
  • Goods vehicle over 3.5 tonnes484 (2.4%)
  • Bus or coach183 (0.9%)
  • Other vehicle154 (0.7%)
  • Taxi or private hire car100 (0.5%)
  • Minibus50 (0.2%)
  • Agricultural vehicle19 (0.1%)
  • Other32 (0.2%)
  • Not recorded77 (0.4%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes and hotspots in Chiltern

Map of the 24 most recent crashes and the 10 busiest accident hotspots in Chiltern

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Accident hotspots (10)

Accident hotspots in Chiltern

Chesham South, Buckinghamshire, HP5 2HE area is the busiest accident hotspot in Chiltern, with 357 collisions from 2001 to 2025, 1 of them fatal.

Roads in Chiltern with the most crashes

The A413 had the most collisions in Chiltern from 1979 to 2025: 1,503, including 44 fatal and 342 serious.

Roads ranked by collisions in Chiltern, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA4131,5032,23244342
2ndA4161,3431,61515279
3rdA4041,0471,48731228
4thA4128304411879
5thA355265378751
6thB474256375558
7thB4852042831052
8thB4442190263433
9thB4505169219437
10thM25136221015
11thA40115165327
12thA4154111152120
13thB416617907
14thB4441343507
15thA4121101
16thA41461100
17thA5071201
18thA51401100
19thB44431100
20thB4891201

Towns in Chiltern

Amersham had the most collisions of any town in Chiltern from 1979 to 2025: 1,694.

Postcode districts in Chiltern

HP5 had the most collisions of any postcode district in Chiltern from 1979 to 2025: 2,852.

Buckinghamshire and its former districts

Buckinghamshire recorded 72,942 collisions from 1979 to 2025, and 15% of them were in the old Chiltern district.

Other former districts in Buckinghamshire

Latest crashes in Chiltern

Of the latest 24 crashes in Chiltern, 2 were fatal and 6 were serious. The most recent was on 25 December 2025.

Severity