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CrashStats

WD3 road accidents: crash map and statistics

Police recorded 7,026 road traffic collisions in the WD3 postcode district, Three Rivers, from 1979 to 2025, and 9,988 people were killed or injured in them. Of those collisions, 84 were fatal and 1,316 were serious.

In 2025 police recorded 55 collisions, up 2% on 2024 (54).

Collisions since 1979
7,026
183rd highest of 2,813 postcode districts
Casualties
9,988
1.42 per collision
Fatal collisions
84
89 people killed
Serious collisions
1,316
1,551 seriously injured
Collisions in 2025
55
Up 2% on 2024
Casualties in 2025
78
Up 8% on 2024

Road collision statistics for WD3

Collisions by severity, 1979 to 2025

  • Fatal841.2%
  • Serious1,31619%
  • Slight5,62680%

What the data shows

  • WD3 had 686 collisions from 2016 to 2025, 42% fewer than the 1,182 from 2006 to 2015.
  • 20% of collisions in WD3 were fatal or serious, against 20% across Great Britain.
  • 926 children under 16 were killed or injured in WD3, 9.3% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 38% of collisions in WD3.

Where WD3 ranks among 2,813 postcode districts

Most collisions
183rd
Most casualties
136th
Most fatal collisions
453rd
Most serious collisions
152nd

Collisions by day of the week

  • Monday979 (14%)
  • Tuesday1,060 (15%)
  • Wednesday988 (14%)
  • Thursday1,067 (15%)
  • Friday1,234 (18%)
  • Saturday896 (13%)
  • Sunday802 (11%)

Light conditions

  • Daylight5,076 (72%)
  • Dark, street lights lit1,295 (18%)
  • Dark, no street lighting580 (8.3%)
  • Dark, lighting unknown46 (0.7%)
  • Dark, street lights unlit29 (0.4%)

Type of road

  • Single carriageway4,383 (62%)
  • Dual carriageway2,136 (30%)
  • Roundabout281 (4%)
  • One way street or slip road206 (2.9%)
  • Not recorded20 (0.3%)

Speed limit at the scene

  • 20 mph38 (0.5%)
  • 30 mph3,115 (44%)
  • 40 mph953 (14%)
  • 50 mph72 (1%)
  • 60 mph1,034 (15%)
  • 70 mph1,813 (26%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds5,534 (79%)
  • Raining, no high winds991 (14%)
  • Fine with high winds86 (1.2%)
  • Raining with high winds76 (1.1%)
  • Fog or mist56 (0.8%)
  • Snowing, no high winds33 (0.5%)
  • Snowing with high winds4 (0.1%)
  • Other159 (2.3%)
  • Not recorded87 (1.2%)

Who was hurt

  • Car occupant7,058 (71%)
  • Motorcyclist910 (9.1%)
  • Pedestrian710 (7.1%)
  • Cyclist545 (5.5%)
  • Van occupant353 (3.5%)
  • Goods vehicle occupant (over 3.5 tonnes)165 (1.7%)
  • Bus or coach occupant91 (0.9%)
  • Other vehicle occupant51 (0.5%)
  • Minibus occupant45 (0.5%)
  • Taxi or private hire car occupant40 (0.4%)
  • Other18 (0.2%)
  • Not recorded2 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

WD3 road accidents by year

Collisions and casualties in WD3, 1979 to 2025

Collisions in WD3 peaked at 271 in 1997; 2025 had 55.

  • Collisions
  • Collisions in 2025: 55
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20255578
20245472
20237093
20226892
20214965
20205566
201971103
201886122
201798141
201680119
2015104154
2014108165
20137295
201288117
2011124167
2010113152
2009128181
2008132191
2007163263
2006150224
2005180270
2004170271
2003190263
2002192278
2001225331
2000209302
1999232334
1998234351
1997271376
1996228345
1995221352
1994184290
1993211293
1992155225
1991136199
1990157218
1989209267
1988194263
1987180254
1986195270
1985178235
1984204274
1983168217
1982175247
1981160213
1980145200
1979155190

Map of recent crashes in WD3

Map of the 24 most recent crashes in WD3

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in WD3

The 24 most recent collisions in WD3 happened between 6 September and 19 December 2025.

Severity

Crashes by road in WD3

The M25 has the most collisions in WD3, 1,674 of 7,026 (24%), followed by the A412 (1,498).

Collisions in WD3 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stM251,6742,63018206
2ndA4121,4981,98816315
3rdA4041,1511,67617218
4thA405100150426
5thA414581117018

Council areas covering WD3

Collisions in WD3 were recorded in 8 council areas. Three Rivers has 6,695 of 7,026 (95%).

Collisions in WD3 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stThree Rivers6,6959,491821,247
2ndBuckinghamshire228347247
3rdHillingdon5167012
4thWatford254107
5thHavering6802
6thWelwyn Hatfield61200
7thDacorum3401
8thNorth Hertfordshire3600

Towns in WD3

Collisions in WD3 were recorded in 6 towns, led by Rickmansworth (2,110) and Chorleywood (1,166).