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CrashStats

B652 accidents: crash map and statistics

Police recorded 317 collisions on the B652 from 1979 to 2025, with 384 casualties. Of those crashes, 3 were fatal and 68 serious, and 3 people were killed.

In 2025 there was 1 collision on the B652, down 75% from 4 in 2024, with 1 casualty.

Collisions since 1979
317
2,616th highest of 4,923 roads
Casualties
384
1.21 per collision
Fatal collisions
3
3 people killed
Serious collisions
68
74 seriously injured
Collisions in 2025
1
Down 75% on 2024
Casualties in 2025
1
Down 83% on 2024

Crash severity on the B652

On the B652, 0.9% of collisions were fatal and 21% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal30.9%
  • Serious6821%
  • Slight24678%

Where the B652 ranks among 4,923 roads

Most collisions
2,616th
Most casualties
2,787th
Most fatal collisions
3,114th
Most serious collisions
2,523rd

B652 accidents by year

Collisions on the B652 peaked at 14 in 1982 and were down to 1 in 2025.

Collisions and casualties on the B652, 1979 to 2025

  • Collisions
  • Collisions in 2025: 1
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202511
202446
202311
202234
202111
202022
201900
201800
201733
201645
201533
201445
201378
201277
201167
201057
200955
200833
20071216
2006912
20051010
200456
200355
2002910
200188
200068
19991213
1998918
1997812
19961114
19951113
199455
199379
1992812
1991911
199099
198999
1988911
198768
1986912
19851012
19841111
1983811
19821416
198168
19801213
19791114

When crashes happen on the B652

Friday has the most collisions on the B652 (58), and 3pm to 6pm is the busiest time of day (77).

Collisions by day of the week

  • Monday45 (14%)
  • Tuesday50 (16%)
  • Wednesday49 (15%)
  • Thursday48 (15%)
  • Friday58 (18%)
  • Saturday50 (16%)
  • Sunday17 (5.4%)

Collisions by time of day

  • Midnight to 3am6 (1.9%)
  • 3am to 6am6 (1.9%)
  • 6am to 9am53 (17%)
  • 9am to noon48 (15%)
  • Noon to 3pm49 (15%)
  • 3pm to 6pm77 (24%)
  • 6pm to 9pm45 (14%)
  • 9pm to midnight33 (10%)

Collisions by month

  • January21 (6.6%)
  • February22 (6.9%)
  • March28 (8.8%)
  • April20 (6.3%)
  • May25 (7.9%)
  • June27 (8.5%)
  • July33 (10%)
  • August14 (4.4%)
  • September36 (11%)
  • October23 (7.3%)
  • November36 (11%)
  • December32 (10%)

Light conditions at the time

  • Daylight233 (74%)
  • Dark, street lights lit77 (24%)
  • Dark, no street lighting5 (1.6%)
  • Dark, lighting unknown1 (0.3%)
  • Dark, street lights unlit1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B652 crashes

On the B652, 87% of collisions happened where the speed limit was 30 mph and 55% on a dry road surface.

Speed limit at the scene

  • 30 mph276 (87%)
  • 60 mph41 (13%)

Weather at the time

  • Fine, no high winds249 (79%)
  • Raining, no high winds42 (13%)
  • Fog or mist5 (1.6%)
  • Raining with high winds3 (0.9%)
  • Other14 (4.4%)
  • Not recorded4 (1.3%)

Road surface

  • Dry174 (55%)
  • Wet or damp132 (42%)
  • Frost or ice6 (1.9%)
  • Snow3 (0.9%)
  • Flood over 3cm deep1 (0.3%)
  • Not recorded1 (0.3%)

Type of road

  • Single carriageway315 (99%)
  • Roundabout1 (0.3%)
  • Not recorded1 (0.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B652 crashes

Car occupants make up 47% of the people killed or injured on the B652, followed by cyclists (18%).

Casualties by road user

  • Car occupant181 (47%)
  • Cyclist69 (18%)
  • Pedestrian64 (17%)
  • Motorcyclist56 (15%)
  • Goods vehicle occupant (over 3.5 tonnes)4 (1%)
  • Bus or coach occupant3 (0.8%)
  • Van occupant3 (0.8%)
  • Other4 (1%)

Vehicles involved

  • Car397 (70%)
  • Pedal cycle69 (12%)
  • Motorcycle59 (10%)
  • Van or goods vehicle up to 3.5 tonnes16 (2.8%)
  • Goods vehicle over 3.5 tonnes13 (2.3%)
  • Other vehicle5 (0.9%)
  • Bus or coach4 (0.7%)
  • Other6 (1.1%)

Casualties by age

  • 0 to 54 (1%)
  • 6 to 109 (2.3%)
  • 11 to 1546 (12%)
  • 16 to 2095 (25%)
  • 21 to 2537 (9.6%)
  • 26 to 3563 (16%)
  • 36 to 4541 (11%)
  • 46 to 5533 (8.6%)
  • 56 to 6529 (7.6%)
  • 66 to 7513 (3.4%)
  • Over 7514 (3.6%)

Drivers, passengers and pedestrians

  • Driver or rider266 (69%)
  • Pedestrian64 (17%)
  • Passenger54 (14%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B652

Map of the 25 most recent crashes on the B652

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

  • 25 crashes
  • Serious
  • Slight

B652 crashes by council area

Collisions on the B652 were recorded in 2 council areas. St Albans has the most, with 261, followed by North Hertfordshire (56).

Collisions on the B652 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSt Albans261312256
2ndNorth Hertfordshire5672112

B652 crashes by town

Of the 317 collisions on the B652, 219 were in the built-up area of Harpenden.

Recent crashes on the B652

These are the 25 most recent collisions on the B652, from 11 June 2014 to 23 November 2025.

Severity