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CrashStats

B4447 accidents: crash map and statistics

Police recorded 572 collisions on the B4447 from 1979 to 2025, with 712 casualties. Of those crashes, 12 were fatal and 97 serious, and 14 people were killed.

In 2025 there were 5 collisions on the B4447, up 400% from 1 in 2024, with 5 casualties.

Collisions since 1979
572
1,760th highest of 4,923 roads
Casualties
712
1.24 per collision
Fatal collisions
12
14 people killed
Serious collisions
97
116 seriously injured
Collisions in 2025
5
Up 400% on 2024
Casualties in 2025
5
Up 400% on 2024

Crash severity on the B4447

On the B4447, 2.1% of collisions were fatal and 17% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal122.1%
  • Serious9717%
  • Slight46381%

Where the B4447 ranks among 4,923 roads

Most collisions
1,760th
Most casualties
1,898th
Most fatal collisions
1,505th
Most serious collisions
1,966th

B4447 accidents by year

Collisions on the B4447 peaked at 27 in 1986 and were down to 5 in 2025.

Collisions and casualties on the B4447, 1979 to 2025

  • Collisions
  • Collisions in 2025: 5
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202555
202411
202311
202255
202189
202022
201956
201847
201711
20161113
201589
2014812
201367
201289
20111317
20101214
2009910
2008915
200759
20061114
20051416
2004911
200378
20021314
20011216
20001111
19991217
19981422
19971519
199678
19951213
19941519
19932026
19921519
19911115
19901921
19892130
19881821
19871922
19862729
19851820
19842327
19832125
19822335
19812022
19801828
19792632

When crashes happen on the B4447

Monday has the most collisions on the B4447 (97), and 3pm to 6pm is the busiest time of day (122).

Collisions by day of the week

  • Monday97 (17%)
  • Tuesday85 (15%)
  • Wednesday82 (14%)
  • Thursday91 (16%)
  • Friday90 (16%)
  • Saturday68 (12%)
  • Sunday59 (10%)

Collisions by time of day

  • Midnight to 3am18 (3.1%)
  • 3am to 6am7 (1.2%)
  • 6am to 9am93 (16%)
  • 9am to noon75 (13%)
  • Noon to 3pm98 (17%)
  • 3pm to 6pm122 (21%)
  • 6pm to 9pm100 (17%)
  • 9pm to midnight59 (10%)

Collisions by month

  • January53 (9.3%)
  • February32 (5.6%)
  • March41 (7.2%)
  • April33 (5.8%)
  • May44 (7.7%)
  • June52 (9.1%)
  • July50 (8.7%)
  • August42 (7.3%)
  • September49 (8.6%)
  • October66 (12%)
  • November55 (9.6%)
  • December55 (9.6%)

Light conditions at the time

  • Daylight392 (69%)
  • Dark, street lights lit127 (22%)
  • Dark, no street lighting44 (7.7%)
  • Dark, lighting unknown6 (1%)
  • Dark, street lights unlit3 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4447 crashes

On the B4447, 81% of collisions happened where the speed limit was 30 mph and 69% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (0.5%)
  • 30 mph465 (81%)
  • 40 mph37 (6.5%)
  • 50 mph22 (3.8%)
  • 60 mph43 (7.5%)
  • Not recorded2 (0.3%)

Weather at the time

  • Fine, no high winds471 (82%)
  • Raining, no high winds64 (11%)
  • Raining with high winds8 (1.4%)
  • Fine with high winds4 (0.7%)
  • Other22 (3.8%)
  • Not recorded3 (0.5%)

Road surface

  • Dry396 (69%)
  • Wet or damp165 (29%)
  • Frost or ice8 (1.4%)
  • Not recorded3 (0.5%)

Type of road

  • Single carriageway493 (86%)
  • Roundabout62 (11%)
  • Dual carriageway14 (2.4%)
  • One way street or slip road3 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4447 crashes

Car occupants make up 48% of the people killed or injured on the B4447, followed by cyclists (18%).

Casualties by road user

  • Car occupant342 (48%)
  • Cyclist126 (18%)
  • Pedestrian116 (16%)
  • Motorcyclist100 (14%)
  • Van occupant18 (2.5%)
  • Taxi or private hire car occupant4 (0.6%)
  • Bus or coach occupant3 (0.4%)
  • Other3 (0.4%)

Vehicles involved

  • Car730 (71%)
  • Pedal cycle125 (12%)
  • Motorcycle101 (9.8%)
  • Van or goods vehicle up to 3.5 tonnes41 (4%)
  • Taxi or private hire car9 (0.9%)
  • Goods vehicle over 3.5 tonnes7 (0.7%)
  • Other10 (1%)
  • Not recorded4 (0.4%)

Casualties by age

  • 0 to 519 (2.7%)
  • 6 to 1023 (3.2%)
  • 11 to 1547 (6.6%)
  • 16 to 20156 (22%)
  • 21 to 2587 (12%)
  • 26 to 35108 (15%)
  • 36 to 4570 (9.8%)
  • 46 to 5563 (8.8%)
  • 56 to 6553 (7.4%)
  • 66 to 7527 (3.8%)
  • Over 7528 (3.9%)
  • Not recorded31 (4.4%)

Drivers, passengers and pedestrians

  • Driver or rider462 (65%)
  • Passenger134 (19%)
  • Pedestrian116 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4447

Map of the 25 most recent crashes on the B4447

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4447 crashes by council area

Of the 572 collisions on the B4447, 571 were in Windsor and Maidenhead.

Collisions on the B4447 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead5717101297

B4447 crashes by town

Collisions on the B4447 were recorded in 2 towns and built-up areas, led by Maidenhead (384) and Cookham (103).

Recent crashes on the B4447

These are the 25 most recent collisions on the B4447, from 14 October 2019 to 11 December 2025.

Severity