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CrashStats

B466 accidents: crash map and statistics

Police recorded 1,777 collisions on the B466 from 1979 to 2025, with 2,177 casualties. Of those crashes, 15 were fatal and 282 serious, and 15 people were killed.

In 2025 there were 15 collisions on the B466, level with 2024, with 16 casualties.

Collisions since 1979
1,777
651st highest of 4,923 roads
Casualties
2,177
1.23 per collision
Fatal collisions
15
15 people killed
Serious collisions
282
320 seriously injured
Collisions in 2025
15
Level with 2024
Casualties in 2025
16
Down 6% on 2024

Crash severity on the B466

On the B466, 0.8% of collisions were fatal and 16% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal150.8%
  • Serious28216%
  • Slight1,48083%

Where the B466 ranks among 4,923 roads

Most collisions
651st
Most casualties
701st
Most fatal collisions
1,258th
Most serious collisions
765th

B466 accidents by year

Collisions on the B466 peaked at 73 in 1988 and were down to 15 in 2025.

Collisions and casualties on the B466, 1979 to 2025

  • Collisions
  • Collisions in 2025: 15
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251516
20241517
20231010
20221418
20212022
20202128
20191822
20182430
20172125
20162025
20151618
20142124
20131619
20122433
20113340
20102633
20092231
20082527
20072431
20062534
20053850
20043241
20033844
20023851
20014058
20003442
19993441
19983847
19974550
19964451
19954048
19944359
19933748
19923639
19913443
19907287
19897281
19887386
19876172
19867183
19857291
19847081
19835564
19824659
19817092
19806682
19796884

When crashes happen on the B466

Friday has the most collisions on the B466 (291), and 3pm to 6pm is the busiest time of day (419).

Collisions by day of the week

  • Monday259 (15%)
  • Tuesday258 (15%)
  • Wednesday268 (15%)
  • Thursday288 (16%)
  • Friday291 (16%)
  • Saturday228 (13%)
  • Sunday185 (10%)

Collisions by time of day

  • Midnight to 3am65 (3.7%)
  • 3am to 6am20 (1.1%)
  • 6am to 9am242 (14%)
  • 9am to noon245 (14%)
  • Noon to 3pm276 (16%)
  • 3pm to 6pm419 (24%)
  • 6pm to 9pm319 (18%)
  • 9pm to midnight191 (11%)

Collisions by month

  • January159 (8.9%)
  • February119 (6.7%)
  • March150 (8.4%)
  • April134 (7.5%)
  • May137 (7.7%)
  • June125 (7%)
  • July155 (8.7%)
  • August133 (7.5%)
  • September156 (8.8%)
  • October174 (9.8%)
  • November182 (10%)
  • December153 (8.6%)

Light conditions at the time

  • Daylight1,215 (68%)
  • Dark, street lights lit547 (31%)
  • Dark, no street lighting6 (0.3%)
  • Dark, street lights unlit6 (0.3%)
  • Dark, lighting unknown3 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B466 crashes

On the B466, 97% of collisions happened where the speed limit was 30 mph and 72% on a dry road surface.

Speed limit at the scene

  • 20 mph7 (0.4%)
  • 30 mph1,724 (97%)
  • 40 mph36 (2%)
  • 50 mph2 (0.1%)
  • 60 mph2 (0.1%)
  • 70 mph6 (0.3%)

Weather at the time

  • Fine, no high winds1,310 (74%)
  • Raining, no high winds239 (13%)
  • Fine with high winds8 (0.5%)
  • Fog or mist7 (0.4%)
  • Other206 (12%)
  • Not recorded7 (0.4%)

Road surface

  • Dry1,275 (72%)
  • Wet or damp464 (26%)
  • Frost or ice23 (1.3%)
  • Snow14 (0.8%)
  • Not recorded1 (0.1%)

Type of road

  • Single carriageway1,312 (74%)
  • Roundabout203 (11%)
  • Dual carriageway133 (7.5%)
  • One way street or slip road6 (0.3%)
  • Not recorded123 (6.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B466 crashes

Car occupants make up 58% of the people killed or injured on the B466, followed by motorcyclists (15%).

Casualties by road user

  • Car occupant1,262 (58%)
  • Motorcyclist330 (15%)
  • Pedestrian256 (12%)
  • Cyclist241 (11%)
  • Van occupant35 (1.6%)
  • Bus or coach occupant22 (1%)
  • Other29 (1.3%)
  • Not recorded2 (0.1%)

Vehicles involved

  • Car2,470 (75%)
  • Motorcycle332 (10%)
  • Pedal cycle241 (7.3%)
  • Van or goods vehicle up to 3.5 tonnes154 (4.7%)
  • Goods vehicle over 3.5 tonnes33 (1%)
  • Bus or coach26 (0.8%)
  • Other vehicle16 (0.5%)
  • Other22 (0.7%)

Casualties by age

  • 0 to 522 (1%)
  • 6 to 1052 (2.4%)
  • 11 to 15143 (6.6%)
  • 16 to 20409 (19%)
  • 21 to 25260 (12%)
  • 26 to 35375 (17%)
  • 36 to 45283 (13%)
  • 46 to 55216 (9.9%)
  • 56 to 65136 (6.2%)
  • 66 to 7587 (4%)
  • Over 7570 (3.2%)
  • Not recorded124 (5.7%)

Drivers, passengers and pedestrians

  • Driver or rider1,487 (68%)
  • Passenger434 (20%)
  • Pedestrian256 (12%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B466

Map of the 25 most recent crashes on the B466

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

  • 25 crashes
  • Serious
  • Slight

B466 crashes by council area

Collisions on the B466 were recorded in 2 council areas. Hillingdon has the most, with 1,753, followed by Harrow (24).

Collisions on the B466 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHillingdon1,7532,14715279
2ndHarrow243003

B466 crashes by town

Collisions on the B466 were recorded in 2 towns and built-up areas, led by Hillingdon (1,404) and Harrow (13).

Recent crashes on the B466

These are the 25 most recent collisions on the B466, from 9 May 2024 to 6 December 2025.

Severity