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CrashStats

HP23 road accidents: crash map and statistics

Police recorded 2,131 road traffic collisions in the HP23 postcode district, Dacorum, from 1979 to 2025, and 3,069 people were killed or injured in them. Of those collisions, 44 were fatal and 524 were serious.

In 2025 police recorded 22 collisions, up from 16 in 2024.

Collisions since 1979
2,131
1,690th of 2,813 postcode districts, highest first
Casualties
3,069
1.44 per collision
Fatal collisions
44
47 people killed
Serious collisions
524
631 seriously injured
Collisions in 2025
22
16 in 2024
Casualties in 2025
28
Up 33% on 2024

Road collision statistics for HP23

Collisions by severity, 1979 to 2025

  • Fatal442.1%
  • Serious52425%
  • Slight1,56373%

What the data shows

  • HP23 had 192 collisions from 2016 to 2025, 46% fewer than the 354 from 2006 to 2015.
  • 27% of collisions in HP23 were fatal or serious, against 20% across Great Britain.
  • 319 children under 16 were killed or injured in HP23, 10% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 42% of collisions in HP23.

Where HP23 ranks among 2,813 postcode districts

Most collisions
1,690th
Most casualties
1,638th
Most fatal collisions
1,376th
Most serious collisions
1,421st

Collisions by day of the week

  • Monday311 (15%)
  • Tuesday274 (13%)
  • Wednesday325 (15%)
  • Thursday310 (15%)
  • Friday357 (17%)
  • Saturday318 (15%)
  • Sunday236 (11%)

Light conditions

  • Daylight1,522 (71%)
  • Dark, no street lighting318 (15%)
  • Dark, street lights lit253 (12%)
  • Dark, street lights unlit20 (0.9%)
  • Dark, lighting unknown17 (0.8%)
  • Not recorded1 (under 0.1%)

Type of road

  • Single carriageway1,812 (85%)
  • Dual carriageway178 (8.4%)
  • Roundabout120 (5.6%)
  • One way street or slip road20 (0.9%)
  • Not recorded1 (under 0.1%)

Speed limit at the scene

  • 20 mph8 (0.4%)
  • 30 mph842 (40%)
  • 40 mph89 (4.2%)
  • 50 mph18 (0.8%)
  • 60 mph991 (47%)
  • 70 mph183 (8.6%)

Weather at the time

  • Fine, no high winds1,657 (78%)
  • Raining, no high winds313 (15%)
  • Fine with high winds30 (1.4%)
  • Fog or mist30 (1.4%)
  • Raining with high winds20 (0.9%)
  • Snowing, no high winds12 (0.6%)
  • Snowing with high winds5 (0.2%)
  • Other49 (2.3%)
  • Not recorded15 (0.7%)

Who was hurt

  • Car occupant2,059 (67%)
  • Motorcyclist333 (11%)
  • Pedestrian238 (7.8%)
  • Cyclist230 (7.5%)
  • Van occupant103 (3.4%)
  • Bus or coach occupant37 (1.2%)
  • Goods vehicle occupant (over 3.5 tonnes)34 (1.1%)
  • Other vehicle occupant14 (0.5%)
  • Taxi or private hire car occupant13 (0.4%)
  • Horse rider3 (0.1%)
  • Other5 (0.2%)

Source: Department for Transport, STATS19 road safety data

HP23 road accidents by year

Collisions and casualties in HP23, 1979 to 2025

Collisions in HP23 peaked at 78 in 1989; 2025 had 22.

  • Collisions
  • Collisions in 2025: 22
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252228
20241621
20231620
20221623
20211519
20201220
20192230
20182529
20172531
20162331
20152531
20142937
20133142
20123747
20113342
20103244
20092541
20084567
20075379
20064460
20053967
20044062
20035075
20025279
20015390
200069102
19996483
199872108
199775109
19966798
19955892
19945676
19935793
19925569
19916193
199064102
198978111
19885894
19875374
19866696
19855979
19846599
19834856
19826082
19816894
19804868
19795076

Map of recent crashes in HP23

Map of the 24 most recent crashes in HP23

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in HP23

The 24 most recent collisions in HP23 happened between 19 October 2024 and 30 December 2025.

Severity

Crashes by road in HP23

The A41 has the most collisions in HP23, 332 of 2,131 (16%), followed by the A4251 (240).

Collisions in HP23 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA413325221182
2ndA4251240351755
3rdB488216346151
4thB489149220143
5thB4635127164223
6thB486100121022
7thB45063557014
8thB40096800

Council areas covering HP23

Collisions in HP23 were recorded in 2 council areas. Dacorum has 1,901 of 2,131 (89%).

Collisions in HP23 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stDacorum1,9012,71938473
2ndBuckinghamshire227345650

Town in HP23

Of the 2,131 collisions in HP23, 597 (28%) were in Tring.