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CrashStats

Hertsmere road accidents in 2020: crash map and statistics

Police recorded 189 road traffic collisions in Hertsmere in 2020, and 278 people were killed or injured in them. Of those collisions, 2 were fatal and 33 were serious.

Collisions were down 18% on 2019 (231), and casualties fell from 298.

Across all years from 1979 to 2025, police recorded 20,104 collisions in Hertsmere.

Collisions in 2020
189
Down 18% on 2019
Casualties in 2020
278
Down 7% on 2019
Fatal collisions
2
1.1% of collisions
Serious collisions
33
17% of collisions

Crash severity in Hertsmere in 2020

1.1% of collisions in Hertsmere in 2020 were fatal and 17% serious, against 1.4% and 16% in Hertsmere from 1979 to 2025.

Collisions by worst injury

  • Fatal21.1%
  • Serious3317%
  • Slight15481%

People hurt, by injury

  • Fatal20.7%
  • Serious3613%
  • Slight24086%

Hertsmere road accidents by year

Collisions and casualties in Hertsmere, 1979 to 2025

Collisions peaked at 646 in 1979. 2020 is highlighted, with 189, down 18% on 2019.

  • Collisions
  • Collisions in 2020: 189
  • 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 in 2020

Collisions by day of the week

  • Monday27 (14%)
  • Tuesday36 (19%)
  • Wednesday26 (14%)
  • Thursday20 (11%)
  • Friday30 (16%)
  • Saturday31 (16%)
  • Sunday19 (10%)

Collisions by time of day

  • 00:00 to 02:598 (4.2%)
  • 03:00 to 05:593 (1.6%)
  • 06:00 to 08:5924 (13%)
  • 09:00 to 11:5936 (19%)
  • 12:00 to 14:5933 (17%)
  • 15:00 to 17:5938 (20%)
  • 18:00 to 20:5932 (17%)
  • 21:00 to 23:5915 (7.9%)

Collisions by month

  • January20 (11%)
  • February21 (11%)
  • March15 (7.9%)
  • April8 (4.2%)
  • May11 (5.8%)
  • June17 (9%)
  • July19 (10%)
  • August17 (9%)
  • September14 (7.4%)
  • October15 (7.9%)
  • November13 (6.9%)
  • December19 (10%)

Light conditions

  • Daylight137 (72%)
  • Dark, street lights lit36 (19%)
  • Dark, no street lighting8 (4.2%)
  • Dark, lighting unknown6 (3.2%)
  • Dark, street lights unlit2 (1.1%)

Weather at the time

  • Fine, no high winds140 (74%)
  • Raining, no high winds31 (16%)
  • Fine with high winds3 (1.6%)
  • Fog or mist1 (0.5%)
  • Raining with high winds1 (0.5%)
  • Snowing with high winds1 (0.5%)
  • Other9 (4.8%)
  • Not recorded3 (1.6%)

Road surface

  • Dry116 (61%)
  • Wet or damp68 (36%)
  • Frost or ice3 (1.6%)
  • Not recorded2 (1.1%)

Speed limit at the scene

  • 20 mph1 (0.5%)
  • 30 mph113 (60%)
  • 40 mph10 (5.3%)
  • 50 mph2 (1.1%)
  • 60 mph25 (13%)
  • 70 mph38 (20%)

Type of road

  • Single carriageway119 (63%)
  • Dual carriageway50 (26%)
  • Roundabout14 (7.4%)
  • One way street or slip road6 (3.2%)

Source: Department for Transport, STATS19 road safety data

Who was hurt in road crashes in Hertsmere in 2020

Casualties by road user

  • Car occupant193 (69%)
  • Pedestrian31 (11%)
  • Motorcyclist26 (9.4%)
  • Cyclist18 (6.5%)
  • Van occupant5 (1.8%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (0.4%)
  • Mobility scooter rider1 (0.4%)
  • Taxi or private hire car occupant1 (0.4%)
  • Not recorded2 (0.7%)

Casualties by age

  • 0 to 54 (1.4%)
  • 6 to 105 (1.8%)
  • 11 to 157 (2.5%)
  • 16 to 2023 (8.3%)
  • 21 to 2534 (12%)
  • 26 to 3565 (23%)
  • 36 to 4552 (19%)
  • 46 to 5541 (15%)
  • 56 to 6515 (5.4%)
  • 66 to 7513 (4.7%)
  • Over 7510 (3.6%)
  • Not recorded9 (3.2%)

Drivers, passengers and pedestrians

  • Driver or rider184 (66%)
  • Passenger63 (23%)
  • Pedestrian31 (11%)

Vehicles involved

  • Car284 (77%)
  • Motorcycle27 (7.3%)
  • Van or goods vehicle up to 3.5 tonnes21 (5.7%)
  • Pedal cycle19 (5.1%)
  • Goods vehicle over 3.5 tonnes10 (2.7%)
  • Other vehicle3 (0.8%)
  • Goods vehicle, weight unknown2 (0.5%)
  • Mobility scooter1 (0.3%)
  • Personal powered transporter (e-scooter or similar)1 (0.3%)
  • Taxi or private hire car1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Crash map for Hertsmere in 2020

Map of the last 24 crashes of 2020 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
  • Serious
  • Slight

Accident hotspots (10)

How Hertsmere ranked among 350 areas in 2020

Of the 350 areas in England, Scotland and Wales, Hertsmere had the 174th most road collisions in 2020.

Collisions
174th
highest of 350 areas
Casualties
149th
highest of 350 areas
Fatal collisions
206th
of 350 areas, highest first
Serious collisions
234th
of 350 areas, highest first

Accident hotspots in Hertsmere in 2020

Borehamwood Brookmeadow, Hertsmere, WD6 1AW area was the busiest accident hotspot in Hertsmere in 2020, with 24 collisions, 7 of them serious.

Roads in Hertsmere with the most crashes in 2020

The M25 had the most collisions in Hertsmere in 2020: 17, including 2 serious.

Roads ranked by collisions in Hertsmere, 2020
RankRoadCollisionsCasualtiesFatalSerious
1stM25173202
2ndB5378161611
3rdA411121803
4thA41111604
5thA100092102
6thA17810
7thM171702
8thA40086701
9thB4626700
10thA1(M)5601
11thA10815800
12thA51835602
13thB5565700
14thA41402300
15thA51352300

Towns in Hertsmere: crashes in 2020

Borehamwood had the most collisions of any town in Hertsmere in 2020: 45.

Postcode districts in Hertsmere: crashes in 2020

WD6 had the most collisions of any postcode district in Hertsmere in 2020: 70.

Latest crashes in Hertsmere in 2020

Of the last 24 crashes in Hertsmere in 2020, none were fatal and 4 were serious. The last was on 30 December 2020.

Severity

Hertsmere road accidents in other years