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CrashStats

Dacorum road accidents: crash map and statistics

Police recorded 20,193 road traffic collisions in Dacorum from 1979 to 2025, and 28,575 people were killed or injured in them. Of those collisions, 270 were fatal and 4,136 were serious.

In 2025 police recorded 161 collisions, up 1% on 2024 (160), and casualties rose from 205 to 207.

Collisions, 1979 to 2025
20,193
165th highest of 351 areas
Casualties
28,575
1.42 per collision
Fatal collisions
270
1.3% of collisions
Collisions in 2025
161
Up 1% on 2024

Crash severity in Dacorum

1.3% of collisions in Dacorum from 1979 to 2025 were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by worst injury

  • Fatal2701.3%
  • Serious4,13620%
  • Slight15,78778%

People hurt, by injury

  • Fatal2931%
  • Serious4,83617%
  • Slight23,44682%

Dacorum road accidents by year

Collisions and casualties in Dacorum, 1979 to 2025

Collisions peaked at 670 in 2000. In 2025 there were 161, up 1% on 2024.

  • Collisions
  • Collisions in 2025: 161
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025161207
2024160205
2023193273
2022187262
2021171227
2020143189
2019201267
2018194259
2017238327
2016234325
2015233323
2014239344
2013238307
2012285382
2011329437
2010325445
2009308454
2008363507
2007403586
2006431622
2005434638
2004459712
2003475725
2002515776
2001591890
2000670999
1999592866
1998610907
1997611887
1996587944
1995561835
1994540719
1993555817
1992543769
1991500678
1990610860
1989611827
1988590816
1987592810
1986622826
1985527732
1984544773
1983519679
1982546760
1981564757
1980621845
1979568780

When and where crashes happen in Dacorum

Collisions by day of the week

  • Monday2,792 (14%)
  • Tuesday2,820 (14%)
  • Wednesday3,017 (15%)
  • Thursday3,009 (15%)
  • Friday3,312 (16%)
  • Saturday2,947 (15%)
  • Sunday2,296 (11%)

Collisions by time of day

  • 00:00 to 02:59667 (3.3%)
  • 03:00 to 05:59291 (1.4%)
  • 06:00 to 08:592,929 (15%)
  • 09:00 to 11:592,880 (14%)
  • 12:00 to 14:593,404 (17%)
  • 15:00 to 17:594,705 (23%)
  • 18:00 to 20:593,333 (17%)
  • 21:00 to 23:591,984 (9.8%)

Collisions by month

  • January1,623 (8%)
  • February1,490 (7.4%)
  • March1,599 (7.9%)
  • April1,568 (7.8%)
  • May1,705 (8.4%)
  • June1,636 (8.1%)
  • July1,718 (8.5%)
  • August1,582 (7.8%)
  • September1,658 (8.2%)
  • October1,899 (9.4%)
  • November1,959 (9.7%)
  • December1,756 (8.7%)

Light conditions

  • Daylight14,403 (71%)
  • Dark, street lights lit4,292 (21%)
  • Dark, no street lighting1,193 (5.9%)
  • Dark, lighting unknown179 (0.9%)
  • Dark, street lights unlit126 (0.6%)

Weather at the time

  • Fine, no high winds15,744 (78%)
  • Raining, no high winds3,039 (15%)
  • Fine with high winds251 (1.2%)
  • Fog or mist223 (1.1%)
  • Raining with high winds220 (1.1%)
  • Snowing, no high winds109 (0.5%)
  • Snowing with high winds31 (0.2%)
  • Other391 (1.9%)
  • Not recorded185 (0.9%)

Road surface

  • Dry12,203 (60%)
  • Wet or damp7,296 (36%)
  • Frost or ice485 (2.4%)
  • Snow117 (0.6%)
  • Flood over 3cm deep27 (0.1%)
  • Oil or diesel9 (under 0.1%)
  • Mud5 (under 0.1%)
  • Not recorded51 (0.3%)

Speed limit at the scene

  • 10 mph2 (under 0.1%)
  • 20 mph89 (0.4%)
  • 30 mph11,881 (59%)
  • 40 mph1,490 (7.4%)
  • 50 mph439 (2.2%)
  • 60 mph3,667 (18%)
  • 70 mph2,625 (13%)

Type of road

  • Single carriageway15,447 (76%)
  • Dual carriageway3,227 (16%)
  • Roundabout1,168 (5.8%)
  • One way street or slip road297 (1.5%)
  • Not recorded54 (0.3%)

Source: Department for Transport, STATS19 road safety data

Who is hurt in road crashes in Dacorum

Casualties by road user

  • Car occupant18,703 (65%)
  • Motorcyclist3,343 (12%)
  • Pedestrian3,097 (11%)
  • Cyclist1,574 (5.5%)
  • Van occupant814 (2.8%)
  • Goods vehicle occupant (over 3.5 tonnes)332 (1.2%)
  • Bus or coach occupant317 (1.1%)
  • Taxi or private hire car occupant156 (0.5%)
  • Minibus occupant119 (0.4%)
  • Other vehicle occupant80 (0.3%)
  • Other35 (0.1%)
  • Not recorded5 (under 0.1%)

Casualties by age

  • 0 to 5532 (1.9%)
  • 6 to 101,071 (3.7%)
  • 11 to 151,621 (5.7%)
  • 16 to 205,558 (19%)
  • 21 to 254,049 (14%)
  • 26 to 355,586 (20%)
  • 36 to 453,867 (14%)
  • 46 to 552,729 (9.6%)
  • 56 to 651,727 (6%)
  • 66 to 751,040 (3.6%)
  • Over 75696 (2.4%)
  • Not recorded99 (0.3%)

Drivers, passengers and pedestrians

  • Driver or rider18,082 (63%)
  • Passenger7,396 (26%)
  • Pedestrian3,097 (11%)

Vehicles involved

  • Car29,989 (76%)
  • Motorcycle3,390 (8.6%)
  • Van or goods vehicle up to 3.5 tonnes1,922 (4.9%)
  • Pedal cycle1,609 (4.1%)
  • Goods vehicle over 3.5 tonnes1,532 (3.9%)
  • Bus or coach406 (1%)
  • Other vehicle240 (0.6%)
  • Taxi or private hire car225 (0.6%)
  • Minibus112 (0.3%)
  • Goods vehicle, weight unknown58 (0.1%)
  • Other47 (0.1%)
  • Not recorded17 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes and hotspots in Dacorum

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

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Accident hotspots (10)

How Dacorum ranks among 351 areas

Of the 351 areas in England, Scotland and Wales, Dacorum had the 165th most road collisions from 1979 to 2025.

Collisions
165th
highest of 351 areas
Casualties
156th
highest of 351 areas
Fatal collisions
108th
lowest of 351 areas
Serious collisions
Joint 156th
highest of 351 areas
Areas ranked by collisions, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
162ndCanterbury20,51527,2143543,817
163rdBassetlaw20,36429,1894924,801
164thSlough20,31326,1802172,708
165thDacorum (this area)20,19328,5752704,136
166thKing's Lynn and West Norfolk20,17429,8026155,013
167thHertsmere20,10427,8562883,202
168thChichester20,06027,8744524,350

Accident hotspots in Dacorum

Apsley and Corner Hall, Dacorum, HP3 9YT area is the busiest accident hotspot in Dacorum, with 595 collisions from 2001 to 2025, 2 of them fatal.

Roads in Dacorum with the most crashes

The A41 had the most collisions in Dacorum from 1979 to 2025: 2,273, including 44 fatal and 532 serious.

Roads ranked by collisions in Dacorum, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA412,2733,24444532
2ndM11,5542,96422209
3rdA42511,2191,73417237
4thA41461,0751,58527236
5thA4141,0521,44215177
6thA41479331,2518167
7thA56071,05618175
8thB48756579310106
9thB4505343517685
10thB488203324150
11thB4506187300459
12thA416166231641
13thB4635127164223
14thB489115167031
15thB486100121022
16thM2583111110
17thA518377117021
18thB45403657114
19thB440253819
20thA108181320

Towns in Dacorum

Hemel Hempstead had the most collisions of any town in Dacorum from 1979 to 2025: 8,645.

Postcode districts in Dacorum

HP2 had the most collisions of any postcode district in Dacorum from 1979 to 2025: 4,362.

Latest crashes in Dacorum

Of the latest 24 crashes in Dacorum, 2 were fatal and 6 were serious. The most recent was on 31 December 2025.

Severity