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CrashStats

AL6 road accidents: crash map and statistics

Police recorded 2,149 road traffic collisions in the AL6 postcode district, Welwyn Hatfield, from 1979 to 2025, and 3,175 people were killed or injured in them. Of those collisions, 33 were fatal and 389 were serious.

In 2025 police recorded 11 collisions, down 52% on 2024 (23).

Collisions since 1979
2,149
1,680th of 2,813 postcode districts, highest first
Casualties
3,175
1.48 per collision
Fatal collisions
33
36 people killed
Serious collisions
389
480 seriously injured
Collisions in 2025
11
Down 52% on 2024
Casualties in 2025
17
Down 51% on 2024

Road collision statistics for AL6

Collisions by severity, 1979 to 2025

  • Fatal331.5%
  • Serious38918%
  • Slight1,72780%

What the data shows

  • AL6 had 247 collisions from 2016 to 2025, 43% fewer than the 435 from 2006 to 2015.
  • 20% of collisions in AL6 were fatal or serious, against 20% across Great Britain.
  • 239 children under 16 were killed or injured in AL6, 7.6% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 40% of collisions in AL6.

Where AL6 ranks among 2,813 postcode districts

Most collisions
1,680th
Most casualties
1,594th
Most fatal collisions
1,756th
Most serious collisions
1,785th

Collisions by day of the week

  • Monday269 (13%)
  • Tuesday310 (14%)
  • Wednesday332 (15%)
  • Thursday344 (16%)
  • Friday395 (18%)
  • Saturday264 (12%)
  • Sunday235 (11%)

Light conditions

  • Daylight1,525 (71%)
  • Dark, no street lighting342 (16%)
  • Dark, street lights lit253 (12%)
  • Dark, lighting unknown16 (0.7%)
  • Dark, street lights unlit13 (0.6%)

Type of road

  • Single carriageway1,087 (51%)
  • Dual carriageway834 (39%)
  • Roundabout145 (6.7%)
  • One way street or slip road78 (3.6%)
  • Not recorded5 (0.2%)

Speed limit at the scene

  • 20 mph3 (0.1%)
  • 30 mph401 (19%)
  • 40 mph247 (11%)
  • 50 mph5 (0.2%)
  • 60 mph640 (30%)
  • 70 mph853 (40%)

Weather at the time

  • Fine, no high winds1,670 (78%)
  • Raining, no high winds316 (15%)
  • Fine with high winds31 (1.4%)
  • Raining with high winds30 (1.4%)
  • Fog or mist22 (1%)
  • Snowing, no high winds14 (0.7%)
  • Snowing with high winds3 (0.1%)
  • Other40 (1.9%)
  • Not recorded23 (1.1%)

Who was hurt

  • Car occupant2,325 (73%)
  • Motorcyclist337 (11%)
  • Cyclist148 (4.7%)
  • Van occupant138 (4.3%)
  • Pedestrian125 (3.9%)
  • Goods vehicle occupant (over 3.5 tonnes)37 (1.2%)
  • Minibus occupant25 (0.8%)
  • Taxi or private hire car occupant13 (0.4%)
  • Bus or coach occupant12 (0.4%)
  • Other vehicle occupant12 (0.4%)
  • Other3 (0.1%)

Source: Department for Transport, STATS19 road safety data

AL6 road accidents by year

Collisions and casualties in AL6, 1979 to 2025

Collisions in AL6 peaked at 76 in 2000; 2025 had 11.

  • Collisions
  • Collisions in 2025: 11
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251117
20242335
20232126
20221623
20212228
20201627
20193363
20183163
20173047
20164470
20154069
20144051
20134865
20123754
20113853
20103455
20094978
20084562
20075167
20065388
20056295
20047399
200371109
200273105
20016291
200076112
199963101
19984470
19976087
199668106
19955387
19945377
19935387
19924762
19912831
19905175
19895882
19884163
19875064
19865271
19856897
19844152
19835371
19824255
19813551
19804467
19794667

Map of recent crashes in AL6

Map of the 24 most recent crashes in AL6

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in AL6

The 24 most recent collisions in AL6 happened between 10 June 2024 and 28 November 2025.

Severity

Crashes by road in AL6

The A1(M) has the most collisions in AL6, 629 of 2,149 (29%), followed by the B197 (380).

Collisions in AL6 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA1(M)6291,02717102
2ndB197380581791
3rdA1000279362144
4thA1135204014
5thB656116159019
6thB100092148023

Council areas covering AL6

Collisions in AL6 were recorded in 4 council areas. Welwyn Hatfield has 1,826 of 2,149 (85%).

Collisions in AL6 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stWelwyn Hatfield1,8262,70429327
2ndNorth Hertfordshire173268329
3rdEast Hertfordshire125167127
4thSt Albans213105

Towns in AL6

Collisions in AL6 were recorded in 3 towns, led by Woolmer Green (309) and Welwyn (280).