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CrashStats

A437 accidents: crash map and statistics

Police recorded 2,185 collisions on the A437 from 1979 to 2025, with 2,734 casualties. Of those crashes, 25 were fatal and 327 serious, and 25 people were killed.

In 2025 there were 45 collisions on the A437, up 18% from 38 in 2024, with 53 casualties.

Collisions since 1979
2,185
535th highest of 4,923 roads
Casualties
2,734
1.25 per collision
Fatal collisions
25
25 people killed
Serious collisions
327
362 seriously injured
Collisions in 2025
45
Up 18% on 2024
Casualties in 2025
53
Up 20% on 2024

Crash severity on the A437

On the A437, 1.1% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal251.1%
  • Serious32715%
  • Slight1,83384%

Where the A437 ranks among 4,923 roads

Most collisions
535th
Most casualties
579th
Most fatal collisions
800th
Most serious collisions
653rd

A437 accidents by year

Collisions on the A437 peaked at 92 in 1995 and were down to 45 in 2025.

Collisions and casualties on the A437, 1979 to 2025

  • Collisions
  • Collisions in 2025: 45
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20254553
20243844
20233346
20224653
20212427
20202229
20194147
20184557
20173953
20164361
20154762
20145475
20133444
20124970
20114350
20105062
20094665
20084967
20075562
20064351
20054153
20045262
20036375
20025669
20016884
20005263
19997598
19987385
19977291
19967588
199592130
199477101
19936585
19925370
19916675
19903645
19892331
19881719
19872930
19862529
19853642
19842627
19833337
19825163
19812734
19802633
19793037

When crashes happen on the A437

Friday has the most collisions on the A437 (377), and 3pm to 6pm is the busiest time of day (492).

Collisions by day of the week

  • Monday320 (15%)
  • Tuesday322 (15%)
  • Wednesday327 (15%)
  • Thursday350 (16%)
  • Friday377 (17%)
  • Saturday296 (14%)
  • Sunday193 (8.8%)

Collisions by time of day

  • Midnight to 3am70 (3.2%)
  • 3am to 6am46 (2.1%)
  • 6am to 9am328 (15%)
  • 9am to noon278 (13%)
  • Noon to 3pm380 (17%)
  • 3pm to 6pm492 (23%)
  • 6pm to 9pm377 (17%)
  • 9pm to midnight214 (9.8%)

Collisions by month

  • January194 (8.9%)
  • February152 (7%)
  • March176 (8.1%)
  • April169 (7.7%)
  • May190 (8.7%)
  • June194 (8.9%)
  • July158 (7.2%)
  • August157 (7.2%)
  • September186 (8.5%)
  • October194 (8.9%)
  • November196 (9%)
  • December219 (10%)

Light conditions at the time

  • Daylight1,517 (69%)
  • Dark, street lights lit633 (29%)
  • Dark, lighting unknown20 (0.9%)
  • Dark, street lights unlit10 (0.5%)
  • Dark, no street lighting5 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A437 crashes

On the A437, 93% of collisions happened where the speed limit was 30 mph and 75% on a dry road surface.

Speed limit at the scene

  • 20 mph15 (0.7%)
  • 30 mph2,035 (93%)
  • 40 mph122 (5.6%)
  • 50 mph7 (0.3%)
  • 60 mph4 (0.2%)
  • 70 mph2 (0.1%)

Weather at the time

  • Fine, no high winds1,738 (80%)
  • Raining, no high winds267 (12%)
  • Raining with high winds17 (0.8%)
  • Snowing, no high winds12 (0.5%)
  • Other127 (5.8%)
  • Not recorded24 (1.1%)

Road surface

  • Dry1,648 (75%)
  • Wet or damp490 (22%)
  • Frost or ice29 (1.3%)
  • Snow9 (0.4%)
  • Not recorded9 (0.4%)

Type of road

  • Single carriageway1,673 (77%)
  • Dual carriageway270 (12%)
  • Roundabout154 (7%)
  • One way street or slip road30 (1.4%)
  • Not recorded58 (2.7%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A437 crashes

Car occupants make up 58% of the people killed or injured on the A437, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant1,583 (58%)
  • Motorcyclist374 (14%)
  • Pedestrian368 (13%)
  • Cyclist222 (8.1%)
  • Bus or coach occupant87 (3.2%)
  • Van occupant61 (2.2%)
  • Other37 (1.4%)
  • Not recorded2 (0.1%)

Vehicles involved

  • Car2,952 (74%)
  • Motorcycle385 (9.6%)
  • Pedal cycle225 (5.6%)
  • Van or goods vehicle up to 3.5 tonnes214 (5.4%)
  • Bus or coach107 (2.7%)
  • Goods vehicle over 3.5 tonnes41 (1%)
  • Taxi or private hire car38 (1%)
  • Other30 (0.8%)

Casualties by age

  • 0 to 543 (1.6%)
  • 6 to 1082 (3%)
  • 11 to 15150 (5.5%)
  • 16 to 20340 (12%)
  • 21 to 25365 (13%)
  • 26 to 35580 (21%)
  • 36 to 45431 (16%)
  • 46 to 55280 (10%)
  • 56 to 65156 (5.7%)
  • 66 to 7576 (2.8%)
  • Over 7559 (2.2%)
  • Not recorded172 (6.3%)

Drivers, passengers and pedestrians

  • Driver or rider1,798 (66%)
  • Passenger568 (21%)
  • Pedestrian368 (13%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A437

Map of the 25 most recent crashes on the A437

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

  • 25 crashes
  • Serious
  • Slight

A437 crashes by council area

Of the 2,185 collisions on the A437, 2,179 were in Hillingdon.

Collisions on the A437 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHillingdon2,1792,72724326

A437 crashes by town

Of the 2,185 collisions on the A437, 2,002 were in the built-up area of Hillingdon.

Recent crashes on the A437

These are the 25 most recent collisions on the A437, from 3 June to 26 December 2025.

Severity