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CrashStats

Hertsmere road accidents: crash map and statistics

Police recorded 20,104 road traffic collisions in Hertsmere from 1979 to 2025, and 27,856 people were killed or injured in them. Of those collisions, 288 were fatal and 3,202 were serious.

In 2025 police recorded 223 collisions, down 10% on 2024 (249), and casualties fell from 349 to 317.

Collisions, 1979 to 2025
20,104
167th highest of 351 areas
Casualties
27,856
1.39 per collision
Fatal collisions
288
1.4% of collisions
Collisions in 2025
223
Down 10% on 2024

Crash severity in Hertsmere

1.4% of collisions in Hertsmere from 1979 to 2025 were fatal and 16% serious, against 1.6% and 18% across Great Britain.

Collisions by worst injury

  • Fatal2881.4%
  • Serious3,20216%
  • Slight16,61483%

People hurt, by injury

  • Fatal3171.1%
  • Serious3,79214%
  • Slight23,74785%

Hertsmere road accidents by year

Collisions and casualties in Hertsmere, 1979 to 2025

Collisions peaked at 646 in 1979. In 2025 there were 223, down 10% on 2024.

  • Collisions
  • Collisions in 2025: 223
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025223317
2024249349
2023234316
2022263381
2021215295
2020189278
2019231298
2018272394
2017308422
2016349517
2015364510
2014337577
2013308438
2012310449
2011342487
2010355509
2009348494
2008340484
2007396619
2006429621
2005429622
2004468681
2003459700
2002505778
2001499771
2000506747
1999539719
1998502684
1997531703
1996520656
1995568750
1994502645
1993480661
1992497688
1991479644
1990586777
1989569731
1988510690
1987540716
1986544683
1985528671
1984565717
1983452586
1982496668
1981540711
1980582799
1979646903

When and where crashes happen in Hertsmere

Collisions by day of the week

  • Monday2,920 (15%)
  • Tuesday2,964 (15%)
  • Wednesday2,913 (14%)
  • Thursday3,079 (15%)
  • Friday3,423 (17%)
  • Saturday2,660 (13%)
  • Sunday2,145 (11%)

Collisions by time of day

  • 00:00 to 02:59675 (3.4%)
  • 03:00 to 05:59395 (2%)
  • 06:00 to 08:592,942 (15%)
  • 09:00 to 11:592,907 (14%)
  • 12:00 to 14:593,417 (17%)
  • 15:00 to 17:594,601 (23%)
  • 18:00 to 20:593,327 (17%)
  • 21:00 to 23:591,840 (9.2%)

Collisions by month

  • January1,712 (8.5%)
  • February1,464 (7.3%)
  • March1,613 (8%)
  • April1,521 (7.6%)
  • May1,614 (8%)
  • June1,718 (8.5%)
  • July1,665 (8.3%)
  • August1,541 (7.7%)
  • September1,661 (8.3%)
  • October1,879 (9.3%)
  • November1,867 (9.3%)
  • December1,849 (9.2%)

Light conditions

  • Daylight14,298 (71%)
  • Dark, street lights lit4,789 (24%)
  • Dark, no street lighting760 (3.8%)
  • Dark, lighting unknown146 (0.7%)
  • Dark, street lights unlit111 (0.6%)

Weather at the time

  • Fine, no high winds14,550 (72%)
  • Raining, no high winds2,981 (15%)
  • Raining with high winds206 (1%)
  • Fine with high winds191 (1%)
  • Fog or mist167 (0.8%)
  • Snowing, no high winds132 (0.7%)
  • Snowing with high winds16 (0.1%)
  • Other1,745 (8.7%)
  • Not recorded116 (0.6%)

Road surface

  • Dry12,886 (64%)
  • Wet or damp6,463 (32%)
  • Frost or ice377 (1.9%)
  • Snow211 (1%)
  • Flood over 3cm deep74 (0.4%)
  • Oil or diesel7 (under 0.1%)
  • Not recorded86 (0.4%)

Speed limit at the scene

  • 20 mph63 (0.3%)
  • 30 mph11,015 (55%)
  • 40 mph961 (4.8%)
  • 50 mph285 (1.4%)
  • 60 mph3,012 (15%)
  • 70 mph4,768 (24%)

Type of road

  • Single carriageway12,145 (60%)
  • Dual carriageway4,608 (23%)
  • Roundabout1,471 (7.3%)
  • One way street or slip road759 (3.8%)
  • Not recorded1,121 (5.6%)

Source: Department for Transport, STATS19 road safety data

Who is hurt in road crashes in Hertsmere

Casualties by road user

  • Car occupant19,183 (69%)
  • Motorcyclist2,854 (10%)
  • Pedestrian2,331 (8.4%)
  • Cyclist1,289 (4.6%)
  • Van occupant1,020 (3.7%)
  • Bus or coach occupant495 (1.8%)
  • Goods vehicle occupant (over 3.5 tonnes)386 (1.4%)
  • Taxi or private hire car occupant107 (0.4%)
  • Minibus occupant87 (0.3%)
  • Other vehicle occupant75 (0.3%)
  • Other15 (0.1%)
  • Not recorded14 (0.1%)

Casualties by age

  • 0 to 5458 (1.6%)
  • 6 to 10775 (2.8%)
  • 11 to 151,227 (4.4%)
  • 16 to 204,361 (16%)
  • 21 to 253,951 (14%)
  • 26 to 355,742 (21%)
  • 36 to 454,056 (15%)
  • 46 to 552,905 (10%)
  • 56 to 651,737 (6.2%)
  • 66 to 751,039 (3.7%)
  • Over 75669 (2.4%)
  • Not recorded936 (3.4%)

Drivers, passengers and pedestrians

  • Driver or rider18,373 (66%)
  • Passenger7,152 (26%)
  • Pedestrian2,331 (8.4%)

Vehicles involved

  • Car29,062 (76%)
  • Motorcycle2,879 (7.5%)
  • Van or goods vehicle up to 3.5 tonnes2,251 (5.9%)
  • Goods vehicle over 3.5 tonnes1,674 (4.4%)
  • Pedal cycle1,317 (3.4%)
  • Bus or coach447 (1.2%)
  • Other vehicle249 (0.7%)
  • Taxi or private hire car183 (0.5%)
  • Goods vehicle, weight unknown99 (0.3%)
  • Minibus84 (0.2%)
  • Other35 (0.1%)
  • Not recorded23 (0.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes and hotspots in Hertsmere

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

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 Hertsmere ranks among 351 areas

Of the 351 areas in England, Scotland and Wales, Hertsmere had the 167th most road collisions from 1979 to 2025.

Collisions
167th
highest of 351 areas
Casualties
163rd
highest of 351 areas
Fatal collisions
Joint 127th
lowest of 351 areas
Serious collisions
131st
lowest of 351 areas
Areas ranked by collisions, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
164thSlough20,31326,1802172,708
165thDacorum20,19328,5752704,136
166thKing's Lynn and West Norfolk20,17429,8026155,013
167thHertsmere (this area)20,10427,8562883,202
168thChichester20,06027,8744524,350
169thTonbridge and Malling19,98326,8903743,701
170thThanet19,90125,6372543,560

Accident hotspots in Hertsmere

Bushey North, Hertsmere, WD25 8HL area is the busiest accident hotspot in Hertsmere, with 685 collisions from 2001 to 2025, 6 of them fatal.

Roads in Hertsmere with the most crashes

The M25 had the most collisions in Hertsmere from 1979 to 2025: 2,434, including 30 fatal and 286 serious.

Roads ranked by collisions in Hertsmere, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stM252,4343,71930286
2ndA4111,3451,81516255
3rdA411,2131,71217177
4thM11,0061,64929147
5thA18411,34815106
6thA51838221,09317126
7thA10008171,12818154
8thB53787861,05817131
9thB5566959816143
10thB462649904695
11thA5135638776493
12thA1115617331297
13thA4008518716576
14thA10813796751075
15thA1(M)307459551
16thA4140289365344
17thA61522281227
18thA5122169026
19thB15694139112
20thA409698408

Towns in Hertsmere

Borehamwood had the most collisions of any town in Hertsmere from 1979 to 2025: 2,864.

Postcode districts in Hertsmere

EN6 had the most collisions of any postcode district in Hertsmere from 1979 to 2025: 5,103.

Latest crashes in Hertsmere

Of the latest 24 crashes in Hertsmere, 1 was fatal and 8 were serious. The most recent was on 30 December 2025.

Severity