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CrashStats

HP3 road accidents: crash map and statistics

Police recorded 3,943 road traffic collisions in the HP3 postcode district, Dacorum, from 1979 to 2025, and 5,395 people were killed or injured in them. Of those collisions, 45 were fatal and 802 were serious.

In 2025 police recorded 23 collisions, down 4% on 2024 (24).

Collisions since 1979
3,943
910th highest of 2,813 postcode districts
Casualties
5,395
1.37 per collision
Fatal collisions
45
49 people killed
Serious collisions
802
905 seriously injured
Collisions in 2025
23
Down 4% on 2024
Casualties in 2025
30
Up 11% on 2024

Road collision statistics for HP3

Collisions by severity, 1979 to 2025

  • Fatal451.1%
  • Serious80220%
  • Slight3,09679%

What the data shows

  • HP3 had 364 collisions from 2016 to 2025, 43% fewer than the 639 from 2006 to 2015.
  • 21% of collisions in HP3 were fatal or serious, against 20% across Great Britain.
  • 645 children under 16 were killed or injured in HP3, 12% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 40% of collisions in HP3.

Where HP3 ranks among 2,813 postcode districts

Most collisions
910th
Most casualties
867th
Most fatal collisions
1,348th
Most serious collisions
734th

Collisions by day of the week

  • Monday536 (14%)
  • Tuesday563 (14%)
  • Wednesday592 (15%)
  • Thursday587 (15%)
  • Friday661 (17%)
  • Saturday574 (15%)
  • Sunday430 (11%)

Light conditions

  • Daylight2,814 (71%)
  • Dark, street lights lit821 (21%)
  • Dark, no street lighting238 (6%)
  • Dark, lighting unknown48 (1.2%)
  • Dark, street lights unlit22 (0.6%)

Type of road

  • Single carriageway3,429 (87%)
  • Dual carriageway270 (6.8%)
  • Roundabout162 (4.1%)
  • One way street or slip road69 (1.7%)
  • Not recorded13 (0.3%)

Speed limit at the scene

  • 10 mph1 (under 0.1%)
  • 20 mph7 (0.2%)
  • 30 mph2,900 (74%)
  • 40 mph296 (7.5%)
  • 50 mph17 (0.4%)
  • 60 mph568 (14%)
  • 70 mph154 (3.9%)

Weather at the time

  • Fine, no high winds3,106 (79%)
  • Raining, no high winds560 (14%)
  • Fine with high winds54 (1.4%)
  • Raining with high winds46 (1.2%)
  • Fog or mist33 (0.8%)
  • Snowing, no high winds24 (0.6%)
  • Snowing with high winds7 (0.2%)
  • Other79 (2%)
  • Not recorded34 (0.9%)

Who was hurt

  • Car occupant3,363 (62%)
  • Motorcyclist710 (13%)
  • Pedestrian659 (12%)
  • Cyclist354 (6.6%)
  • Van occupant138 (2.6%)
  • Bus or coach occupant62 (1.1%)
  • Goods vehicle occupant (over 3.5 tonnes)30 (0.6%)
  • Taxi or private hire car occupant28 (0.5%)
  • Minibus occupant24 (0.4%)
  • Other vehicle occupant17 (0.3%)
  • Other9 (0.2%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

HP3 road accidents by year

Collisions and casualties in HP3, 1979 to 2025

Collisions in HP3 peaked at 146 in 1980; 2025 had 23.

  • Collisions
  • Collisions in 2025: 23
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252330
20242427
20233352
20224364
20213038
20202737
20193135
20184456
20175169
20165883
20155060
20145576
20135061
20125874
20117294
20106388
20095679
20086688
200790124
20067998
200573104
20047397
200390127
200292135
2001105143
2000103151
1999112177
1998127184
1997114155
199680141
1995114160
199494120
199396126
1992113158
1991107136
1990126165
1989109146
1988113144
1987119156
1986137185
1985108146
1984108159
1983102140
1982135171
1981115176
1980146198
1979129162

Map of recent crashes in HP3

Map of the 24 most recent crashes in HP3

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in HP3

The 24 most recent collisions in HP3 happened between 13 December 2024 and 12 December 2025.

Severity

Crashes by road in HP3

The A41 has the most collisions in HP3, 510 of 3,943 (13%), followed by the A4251 (347).

Collisions in HP3 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA415106866107
2ndA4251347501165
3rdA414313416358
4thB4505311472679
5thA4147195305542
6thA41465680113
7thM1224307
8thA41253601
9thA63300

Council areas covering HP3

Collisions in HP3 were recorded in 7 council areas. Dacorum has 3,627 of 3,943 (92%).

Collisions in HP3 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stDacorum3,6274,91134722
2ndSt Albans143232733
3rdThree Rivers132204437
4thLuton121302
5thBedford101103
6thBuckinghamshire81104
7thCentral Bedfordshire6800

Towns in HP3

Collisions in HP3 were recorded in 3 towns, led by Hemel Hempstead (2,312) and Bovingdon (290).