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CrashStats

WD7 road accidents: crash map and statistics

Police recorded 1,726 road traffic collisions in the WD7 postcode district, Hertsmere, from 1979 to 2025, and 2,402 people were killed or injured in them. Of those collisions, 39 were fatal and 303 were serious.

In 2025 police recorded 13 collisions, down 38% on 2024 (21).

Collisions since 1979
1,726
1,883rd of 2,813 postcode districts, highest first
Casualties
2,402
1.39 per collision
Fatal collisions
39
42 people killed
Serious collisions
303
391 seriously injured
Collisions in 2025
13
Down 38% on 2024
Casualties in 2025
16
Down 36% on 2024

Road collision statistics for WD7

Collisions by severity, 1979 to 2025

  • Fatal392.3%
  • Serious30318%
  • Slight1,38480%

What the data shows

  • WD7 had 232 collisions from 2016 to 2025, 24% fewer than the 307 from 2006 to 2015.
  • 20% of collisions in WD7 were fatal or serious, against 20% across Great Britain.
  • 202 children under 16 were killed or injured in WD7, 8.7% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 41% of collisions in WD7.

Where WD7 ranks among 2,813 postcode districts

Most collisions
1,883rd
Most casualties
1,880th
Most fatal collisions
1,538th
Most serious collisions
1,997th

Collisions by day of the week

  • Monday250 (14%)
  • Tuesday257 (15%)
  • Wednesday258 (15%)
  • Thursday287 (17%)
  • Friday276 (16%)
  • Saturday238 (14%)
  • Sunday160 (9.3%)

Light conditions

  • Daylight1,248 (72%)
  • Dark, street lights lit325 (19%)
  • Dark, no street lighting126 (7.3%)
  • Dark, lighting unknown17 (1%)
  • Dark, street lights unlit10 (0.6%)

Type of road

  • Single carriageway1,462 (85%)
  • Dual carriageway177 (10%)
  • Roundabout48 (2.8%)
  • One way street or slip road29 (1.7%)
  • Not recorded10 (0.6%)

Speed limit at the scene

  • 10 mph1 (0.1%)
  • 20 mph9 (0.5%)
  • 30 mph998 (58%)
  • 40 mph164 (9.5%)
  • 50 mph15 (0.9%)
  • 60 mph360 (21%)
  • 70 mph179 (10%)

Weather at the time

  • Fine, no high winds1,329 (77%)
  • Raining, no high winds267 (15%)
  • Fog or mist23 (1.3%)
  • Raining with high winds22 (1.3%)
  • Fine with high winds14 (0.8%)
  • Snowing, no high winds8 (0.5%)
  • Snowing with high winds1 (0.1%)
  • Other49 (2.8%)
  • Not recorded13 (0.8%)

Who was hurt

  • Car occupant1,688 (70%)
  • Pedestrian228 (9.5%)
  • Motorcyclist224 (9.3%)
  • Van occupant102 (4.2%)
  • Cyclist91 (3.8%)
  • Goods vehicle occupant (over 3.5 tonnes)25 (1%)
  • Bus or coach occupant15 (0.6%)
  • Taxi or private hire car occupant11 (0.5%)
  • Minibus occupant9 (0.4%)
  • Other vehicle occupant8 (0.3%)
  • Other1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

WD7 road accidents by year

Collisions and casualties in WD7, 1979 to 2025

Collisions in WD7 peaked at 72 in 1982; 2025 had 13.

  • Collisions
  • Collisions in 2025: 13
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251316
20242125
20232227
20222530
20211821
20201415
20192943
20183043
20172749
20163354
20153345
20143142
20132130
20122530
20111826
20103957
20093750
20083464
20073346
20063652
20053446
20043548
20034261
20024660
20014265
20003964
19995370
19984254
19974251
19965272
19954977
19944457
19936085
19924563
19914964
19905780
19895168
19884955
19875886
19864966
19854352
19846575
19835072
198272107
198138
1980717
1979914

Map of recent crashes in WD7

Map of the 24 most recent crashes in WD7

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in WD7

The 24 most recent collisions in WD7 happened between 8 June 2024 and 13 December 2025.

Severity

Crashes by road in WD7

The A5183 has the most collisions in WD7, 466 of 1,726 (27%), followed by the B5378 (233).

Collisions in WD7 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA5183466596969
2ndB5378233352956
3rdB462167212126
4thB556159249433
5thM25158267026
6thA681121
7thA53300

Council areas covering WD7

Collisions in WD7 were recorded in 4 council areas. Hertsmere has 1,500 of 1,726 (87%).

Collisions in WD7 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stHertsmere1,5002,04935257
2ndSt Albans195309438
3rdBarnet192505
4thWatford3300

Towns in WD7

Collisions in WD7 were recorded in 4 towns, led by Radlett (724) and Shenley (139).