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CrashStats

Hemel Hempstead road accidents: crash map and statistics

Police recorded 8,726 road traffic collisions in Hemel Hempstead, Dacorum, from 1979 to 2025, and 11,277 people were killed or injured in them. Of those collisions, 71 were fatal and 1,639 were serious.

In 2025 police recorded 63 collisions, down 14% on 2024 (73).

Collisions since 1979
8,726
135th highest of 2,851 towns
Casualties
11,277
1.29 per collision
Fatal collisions
71
74 people killed
Serious collisions
1,639
1,808 seriously injured
Collisions in 2025
63
Down 14% on 2024
Casualties in 2025
78
Down 12% on 2024

Road collision statistics for Hemel Hempstead

Collisions by severity, 1979 to 2025

  • Fatal710.8%
  • Serious1,63919%
  • Slight7,01680%

What the data shows

  • Hemel Hempstead had 889 collisions from 2016 to 2025, 32% fewer than the 1,305 from 2006 to 2015.
  • 20% of collisions in Hemel Hempstead were fatal or serious, against 20% across Great Britain.
  • 1,709 children under 16 were killed or injured in Hemel Hempstead, 15% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 37% of collisions in Hemel Hempstead.

Where Hemel Hempstead ranks among 2,851 towns

Most collisions
135th
Most casualties
133rd
Most fatal collisions
148th
Most serious collisions
117th

Collisions by day of the week

  • Monday1,255 (14%)
  • Tuesday1,270 (15%)
  • Wednesday1,352 (15%)
  • Thursday1,363 (16%)
  • Friday1,442 (17%)
  • Saturday1,230 (14%)
  • Sunday814 (9.3%)

Light conditions

  • Daylight6,213 (71%)
  • Dark, street lights lit2,286 (26%)
  • Dark, lighting unknown101 (1.2%)
  • Dark, street lights unlit75 (0.9%)
  • Dark, no street lighting51 (0.6%)

Type of road

  • Single carriageway7,238 (83%)
  • Dual carriageway688 (7.9%)
  • Roundabout684 (7.8%)
  • One way street or slip road82 (0.9%)
  • Not recorded34 (0.4%)

Speed limit at the scene

  • 10 mph1 (under 0.1%)
  • 20 mph33 (0.4%)
  • 30 mph7,409 (85%)
  • 40 mph928 (11%)
  • 50 mph64 (0.7%)
  • 60 mph178 (2%)
  • 70 mph113 (1.3%)

Weather at the time

  • Fine, no high winds6,863 (79%)
  • Raining, no high winds1,274 (15%)
  • Fine with high winds94 (1.1%)
  • Raining with high winds94 (1.1%)
  • Fog or mist59 (0.7%)
  • Snowing, no high winds46 (0.5%)
  • Snowing with high winds16 (0.2%)
  • Other183 (2.1%)
  • Not recorded97 (1.1%)

Who was hurt

  • Car occupant6,294 (56%)
  • Pedestrian2,014 (18%)
  • Motorcyclist1,587 (14%)
  • Cyclist851 (7.5%)
  • Van occupant189 (1.7%)
  • Bus or coach occupant140 (1.2%)
  • Taxi or private hire car occupant79 (0.7%)
  • Goods vehicle occupant (over 3.5 tonnes)57 (0.5%)
  • Other vehicle occupant27 (0.2%)
  • Minibus occupant22 (0.2%)
  • Other13 (0.1%)
  • Not recorded4 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Hemel Hempstead road accidents by year

Collisions and casualties in Hemel Hempstead, 1979 to 2025

Collisions in Hemel Hempstead peaked at 292 in 1986; 2025 had 63.

  • Collisions
  • Collisions in 2025: 63
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20256378
20247389
202392122
202288130
202188109
20207699
201988108
201895124
2017112142
2016114149
2015126168
2014106132
201389110
2012126164
2011143175
2010129159
2009136194
2008141178
2007149196
2006160216
2005178230
2004174238
2003192256
2002217290
2001254341
2000253350
1999250335
1998254348
1997252331
1996255360
1995239300
1994233291
1993248331
1992249337
1991227290
1990248304
1989240310
1988243302
1987264321
1986292349
1985242301
1984250324
1983243295
1982245315
1981252317
1980273346
1979265323

Map of recent crashes in Hemel Hempstead

Map of the 24 most recent crashes in Hemel Hempstead

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in Hemel Hempstead

The 24 most recent collisions in Hemel Hempstead happened between 21 July and 31 December 2025.

Severity

Crashes by road in Hemel Hempstead

The A4147 has the most collisions in Hemel Hempstead, 842 of 8,726 (9.6%), followed by the A414 (741).

Collisions in Hemel Hempstead on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA41478421,0977145
2ndA4147411,03510133
3rdB4875417551098
4thA4251284399154
5thA4146277356454
6thA41261332174
7thB45057294116
8thA41253601

Council areas covering Hemel Hempstead

Collisions in Hemel Hempstead were recorded in 6 council areas. Dacorum has 8,645 of 8,726 (99%).

Collisions in Hemel Hempstead by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stDacorum8,64511,177691,624
2ndThree Rivers4052110
3rdLuton131412
4thSt Albans101301
5thNorth Hertfordshire7701
6thBedford3300

Postcode districts in Hemel Hempstead

Collisions in Hemel Hempstead were recorded in 4 postcode districts, led by HP2 (3,976) and HP1 (2,423).