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CrashStats

B409 accidents: crash map and statistics

Police recorded 437 collisions on the B409 from 1979 to 2025, with 503 casualties. Of those crashes, 7 were fatal and 88 serious, and 7 people were killed.

In 2025 there were 4 collisions on the B409, level with 2024, with 5 casualties.

Collisions since 1979
437
2,162nd highest of 4,923 roads
Casualties
503
1.15 per collision
Fatal collisions
7
7 people killed
Serious collisions
88
98 seriously injured
Collisions in 2025
4
Level with 2024
Casualties in 2025
5
Down 17% on 2024

Crash severity on the B409

On the B409, 1.6% of collisions were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal71.6%
  • Serious8820%
  • Slight34278%

Where the B409 ranks among 4,923 roads

Most collisions
2,162nd
Most casualties
2,406th
Most fatal collisions
2,103rd
Most serious collisions
2,122nd

B409 accidents by year

Collisions on the B409 peaked at 19 in 1980 and were down to 4 in 2025.

Collisions and casualties on the B409, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202545
202446
202344
2022612
202179
202034
201999
20181315
20171213
20161112
201577
201468
201378
20121010
201189
201067
200956
200822
200766
200633
200544
200489
200356
200277
20011415
200079
199944
19981011
19971516
1996811
1995610
19941621
19931616
1992910
19911213
19901516
19891518
19881216
19871213
19861319
198567
19841617
19831414
19821214
19811313
19801922
19791617

When crashes happen on the B409

Monday has the most collisions on the B409 (73), and 6pm to 9pm is the busiest time of day (105).

Collisions by day of the week

  • Monday73 (17%)
  • Tuesday62 (14%)
  • Wednesday68 (16%)
  • Thursday69 (16%)
  • Friday63 (14%)
  • Saturday62 (14%)
  • Sunday40 (9.2%)

Collisions by time of day

  • Midnight to 3am14 (3.2%)
  • 3am to 6am5 (1.1%)
  • 6am to 9am58 (13%)
  • 9am to noon59 (14%)
  • Noon to 3pm61 (14%)
  • 3pm to 6pm98 (22%)
  • 6pm to 9pm105 (24%)
  • 9pm to midnight37 (8.5%)

Collisions by month

  • January30 (6.9%)
  • February42 (9.6%)
  • March45 (10%)
  • April32 (7.3%)
  • May45 (10%)
  • June36 (8.2%)
  • July24 (5.5%)
  • August23 (5.3%)
  • September39 (8.9%)
  • October30 (6.9%)
  • November46 (11%)
  • December45 (10%)

Light conditions at the time

  • Daylight297 (68%)
  • Dark, street lights lit130 (30%)
  • Dark, lighting unknown6 (1.4%)
  • Dark, no street lighting2 (0.5%)
  • Dark, street lights unlit2 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B409 crashes

On the B409, 91% of collisions happened where the speed limit was 30 mph and 64% on a dry road surface.

Speed limit at the scene

  • 20 mph37 (8.5%)
  • 30 mph398 (91%)
  • 40 mph2 (0.5%)

Weather at the time

  • Fine, no high winds285 (65%)
  • Raining, no high winds87 (20%)
  • Raining with high winds5 (1.1%)
  • Fine with high winds3 (0.7%)
  • Other48 (11%)
  • Not recorded9 (2.1%)

Road surface

  • Dry278 (64%)
  • Wet or damp149 (34%)
  • Snow5 (1.1%)
  • Frost or ice1 (0.2%)
  • Not recorded4 (0.9%)

Type of road

  • Single carriageway364 (83%)
  • Roundabout18 (4.1%)
  • Dual carriageway13 (3%)
  • One way street or slip road5 (1.1%)
  • Not recorded37 (8.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B409 crashes

Car occupants make up 34% of the people killed or injured on the B409, followed by pedestrians (24%).

Casualties by road user

  • Car occupant173 (34%)
  • Pedestrian121 (24%)
  • Motorcyclist110 (22%)
  • Cyclist63 (13%)
  • Bus or coach occupant14 (2.8%)
  • Van occupant13 (2.6%)
  • Other6 (1.2%)
  • Not recorded3 (0.6%)

Vehicles involved

  • Car470 (63%)
  • Motorcycle108 (15%)
  • Pedal cycle66 (8.9%)
  • Van or goods vehicle up to 3.5 tonnes46 (6.2%)
  • Bus or coach23 (3.1%)
  • Taxi or private hire car16 (2.2%)
  • Goods vehicle over 3.5 tonnes4 (0.5%)
  • Other8 (1.1%)

Casualties by age

  • 0 to 511 (2.2%)
  • 6 to 1012 (2.4%)
  • 11 to 1516 (3.2%)
  • 16 to 2044 (8.7%)
  • 21 to 2565 (13%)
  • 26 to 35133 (26%)
  • 36 to 4577 (15%)
  • 46 to 5548 (9.5%)
  • 56 to 6534 (6.8%)
  • 66 to 7514 (2.8%)
  • Over 7516 (3.2%)
  • Not recorded33 (6.6%)

Drivers, passengers and pedestrians

  • Driver or rider299 (59%)
  • Pedestrian121 (24%)
  • Passenger83 (17%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B409

Map of the 25 most recent crashes on the B409

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

  • 25 crashes
  • Serious
  • Slight

B409 crashes by council area

Collisions on the B409 were recorded in 3 council areas. Hounslow has the most, with 184, followed by Ealing (160) and Hammersmith and Fulham (92).

Collisions on the B409 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHounslow184209428
2ndEaling160183339
3rdHammersmith and Fulham92110021

B409 crashes by town

Collisions on the B409 were recorded in 3 towns and built-up areas, led by Hounslow (90) and Ealing (81).

Recent crashes on the B409

These are the 25 most recent collisions on the B409, from 2 March 2021 to 21 June 2025.

Severity