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CrashStats

B309 accidents: crash map and statistics

Police recorded 136 collisions on the B309 from 1979 to 2025, with 153 casualties. Of those crashes, none were fatal and 10 were serious.

In 2025 there were 3 collisions on the B309, up from none in 2024, with 3 casualties.

Collisions since 1979
136
3,708th highest of 4,923 roads
Casualties
153
1.13 per collision
Fatal collisions
0
No one killed
Serious collisions
10
10 seriously injured
Collisions in 2025
3
Up from none in 2024
Casualties in 2025
3
Up from none in 2024

Crash severity on the B309

None of the 136 collisions on the B309 were fatal, and 7.4% were serious (18% across Great Britain).

Collisions by severity, 1979 to 2025

  • Fatal00%
  • Serious107.4%
  • Slight12693%

Where the B309 ranks among 4,923 roads

Most collisions
3,708th
Most casualties
3,907th
Most fatal collisions
4,444th
Most serious collisions
4,617th

B309 accidents by year

Collisions on the B309 peaked at 16 in 1989 and were down to 3 in 2025.

Collisions and casualties on the B309, 1979 to 2025

  • Collisions
  • Collisions in 2025: 3
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202533
202400
202300
202211
202100
202000
201911
201829
201700
201600
201500
201422
201300
201200
201100
201000
200900
200800
200700
200622
200500
200400
200311
200200
200100
200000
199935
199811
199700
199600
199500
199400
199300
199211
199100
19901212
19891618
19881314
19871112
19861013
19851212
198477
198399
198200
198122
19801112
19791616

When crashes happen on the B309

Tuesday has the most collisions on the B309 (29), and 3pm to 6pm is the busiest time of day (47).

Collisions by day of the week

  • Monday18 (13%)
  • Tuesday29 (21%)
  • Wednesday17 (13%)
  • Thursday22 (16%)
  • Friday24 (18%)
  • Saturday20 (15%)
  • Sunday6 (4.4%)

Collisions by time of day

  • Midnight to 3am8 (5.9%)
  • 3am to 6am1 (0.7%)
  • 6am to 9am7 (5.1%)
  • 9am to noon26 (19%)
  • Noon to 3pm22 (16%)
  • 3pm to 6pm47 (35%)
  • 6pm to 9pm12 (8.8%)
  • 9pm to midnight13 (9.6%)

Collisions by month

  • January12 (8.8%)
  • February8 (5.9%)
  • March11 (8.1%)
  • April14 (10%)
  • May15 (11%)
  • June5 (3.7%)
  • July12 (8.8%)
  • August19 (14%)
  • September11 (8.1%)
  • October14 (10%)
  • November9 (6.6%)
  • December6 (4.4%)

Light conditions at the time

  • Daylight100 (74%)
  • Dark, street lights lit34 (25%)
  • Dark, lighting unknown1 (0.7%)
  • Dark, street lights unlit1 (0.7%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B309 crashes

On the B309, 93% of collisions happened where the speed limit was 30 mph and 74% on a dry road surface.

Speed limit at the scene

  • 20 mph5 (3.7%)
  • 30 mph127 (93%)
  • 40 mph4 (2.9%)

Weather at the time

  • Fine, no high winds88 (65%)
  • Raining, no high winds23 (17%)
  • Raining with high winds1 (0.7%)
  • Snowing, no high winds1 (0.7%)
  • Other19 (14%)
  • Not recorded4 (2.9%)

Road surface

  • Dry100 (74%)
  • Wet or damp34 (25%)
  • Snow1 (0.7%)
  • Not recorded1 (0.7%)

Type of road

  • One way street or slip road97 (71%)
  • Single carriageway26 (19%)
  • Dual carriageway5 (3.7%)
  • Not recorded8 (5.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B309 crashes

Motorcyclists make up 34% of the people killed or injured on the B309, followed by pedestrians (28%).

Casualties by road user

  • Motorcyclist52 (34%)
  • Pedestrian43 (28%)
  • Car occupant27 (18%)
  • Taxi or private hire car occupant16 (10%)
  • Cyclist13 (8.5%)
  • Bus or coach occupant1 (0.7%)
  • Other vehicle occupant1 (0.7%)

Vehicles involved

  • Car98 (44%)
  • Motorcycle61 (27%)
  • Taxi or private hire car23 (10%)
  • Pedal cycle14 (6.3%)
  • Van or goods vehicle up to 3.5 tonnes14 (6.3%)
  • Goods vehicle over 3.5 tonnes4 (1.8%)
  • Other vehicle4 (1.8%)
  • Other4 (1.8%)

Casualties by age

  • 0 to 51 (0.7%)
  • 11 to 151 (0.7%)
  • 16 to 2017 (11%)
  • 21 to 2531 (20%)
  • 26 to 3541 (27%)
  • 36 to 4520 (13%)
  • 46 to 5513 (8.5%)
  • 56 to 6511 (7.2%)
  • 66 to 755 (3.3%)
  • Over 752 (1.3%)
  • Not recorded11 (7.2%)

Drivers, passengers and pedestrians

  • Driver or rider86 (56%)
  • Pedestrian43 (28%)
  • Passenger24 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B309

Map of the 25 most recent crashes on the B309

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

  • 25 crashes
  • Serious
  • Slight

B309 crashes by council area

Collisions on the B309 were recorded in 2 council areas. Westminster has the most, with 129, followed by Dorset (3).

Collisions on the B309 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWestminster129142010
2ndDorset3500

B309 crashes by town

Of the 136 collisions on the B309, 100 were in the built-up area of City of Westminster.

Recent crashes on the B309

These are the 25 most recent collisions on the B309, from 5 May 1990 to 15 September 2025.

Severity