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CrashStats

B406 accidents: crash map and statistics

Police recorded 452 collisions on the B406 from 1979 to 2025, with 515 casualties. Of those crashes, 4 were fatal and 44 serious, and 5 people were killed.

In 2025 there were 4 collisions on the B406, down 67% from 12 in 2024, with 5 casualties.

Collisions since 1979
452
2,121st highest of 4,923 roads
Casualties
515
1.14 per collision
Fatal collisions
4
5 people killed
Serious collisions
44
48 seriously injured
Collisions in 2025
4
Down 67% on 2024
Casualties in 2025
5
Down 64% on 2024

Crash severity on the B406

On the B406, 0.9% of collisions were fatal and 9.7% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal40.9%
  • Serious449.7%
  • Slight40489%

Where the B406 ranks among 4,923 roads

Most collisions
2,121st
Most casualties
2,370th
Most fatal collisions
2,815th
Most serious collisions
3,144th

B406 accidents by year

Collisions on the B406 peaked at 35 in 1982 and were down to 4 in 2025.

Collisions and casualties on the B406, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202545
20241214
202399
202255
202122
202056
201988
201855
201777
2016910
201555
20141114
201355
20121010
2011910
201089
2009814
2008913
200768
200644
2005810
200488
20031414
2002910
200177
20001013
1999910
199888
19971415
19961719
19951414
199478
1993710
199222
199188
199077
198999
19881317
19871213
19861313
19851414
19841822
1983513
19823541
19811719
19801314
19791314

When crashes happen on the B406

Thursday has the most collisions on the B406 (88), and noon to 3pm is the busiest time of day (118).

Collisions by day of the week

  • Monday75 (17%)
  • Tuesday62 (14%)
  • Wednesday64 (14%)
  • Thursday88 (19%)
  • Friday72 (16%)
  • Saturday52 (12%)
  • Sunday39 (8.6%)

Collisions by time of day

  • Midnight to 3am22 (4.9%)
  • 3am to 6am12 (2.7%)
  • 6am to 9am22 (4.9%)
  • 9am to noon76 (17%)
  • Noon to 3pm118 (26%)
  • 3pm to 6pm112 (25%)
  • 6pm to 9pm59 (13%)
  • 9pm to midnight31 (6.9%)

Collisions by month

  • January24 (5.3%)
  • February32 (7.1%)
  • March42 (9.3%)
  • April42 (9.3%)
  • May33 (7.3%)
  • June39 (8.6%)
  • July53 (12%)
  • August29 (6.4%)
  • September35 (7.7%)
  • October46 (10%)
  • November41 (9.1%)
  • December36 (8%)

Light conditions at the time

  • Daylight346 (77%)
  • Dark, street lights lit103 (23%)
  • Dark, lighting unknown1 (0.2%)
  • Dark, no street lighting1 (0.2%)
  • Dark, street lights unlit1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B406 crashes

On the B406, 91% of collisions happened where the speed limit was 30 mph and 81% on a dry road surface.

Speed limit at the scene

  • 20 mph31 (6.9%)
  • 30 mph412 (91%)
  • 40 mph8 (1.8%)
  • 60 mph1 (0.2%)

Weather at the time

  • Fine, no high winds348 (77%)
  • Raining, no high winds41 (9.1%)
  • Snowing, no high winds4 (0.9%)
  • Fine with high winds3 (0.7%)
  • Other50 (11%)
  • Not recorded6 (1.3%)

Road surface

  • Dry366 (81%)
  • Wet or damp81 (18%)
  • Frost or ice1 (0.2%)
  • Snow1 (0.2%)
  • Not recorded3 (0.7%)

Type of road

  • Single carriageway240 (53%)
  • One way street or slip road178 (39%)
  • Dual carriageway17 (3.8%)
  • Roundabout2 (0.4%)
  • Not recorded15 (3.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B406 crashes

Pedestrians make up 41% of the people killed or injured on the B406, followed by motorcyclists (20%).

Casualties by road user

  • Pedestrian213 (41%)
  • Motorcyclist101 (20%)
  • Car occupant83 (16%)
  • Cyclist48 (9.3%)
  • Taxi or private hire car occupant48 (9.3%)
  • Bus or coach occupant13 (2.5%)
  • Other8 (1.6%)
  • Not recorded1 (0.2%)

Vehicles involved

  • Car285 (41%)
  • Motorcycle130 (19%)
  • Taxi or private hire car124 (18%)
  • Van or goods vehicle up to 3.5 tonnes63 (9.1%)
  • Pedal cycle57 (8.2%)
  • Bus or coach20 (2.9%)
  • Goods vehicle over 3.5 tonnes10 (1.4%)
  • Other7 (1%)

Casualties by age

  • 0 to 52 (0.4%)
  • 6 to 104 (0.8%)
  • 11 to 157 (1.4%)
  • 16 to 2035 (6.8%)
  • 21 to 2567 (13%)
  • 26 to 35136 (26%)
  • 36 to 4586 (17%)
  • 46 to 5571 (14%)
  • 56 to 6529 (5.6%)
  • 66 to 7519 (3.7%)
  • Over 7513 (2.5%)
  • Not recorded46 (8.9%)

Drivers, passengers and pedestrians

  • Driver or rider233 (45%)
  • Pedestrian213 (41%)
  • Passenger69 (13%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B406

Map of the 25 most recent crashes on the B406

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

  • 25 crashes
  • Serious
  • Slight

B406 crashes by council area

Collisions on the B406 were recorded in 2 council areas. Westminster has the most, with 430, followed by Enfield (16).

Collisions on the B406 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWestminster430491241
2ndEnfield161612

B406 crashes by town

Collisions on the B406 were recorded in 2 towns and built-up areas, led by City of Westminster (392) and Enfield (13).

Recent crashes on the B406

These are the 25 most recent collisions on the B406, from 15 April 2023 to 22 December 2025.

Severity