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CrashStats

B3021 accidents: crash map and statistics

Police recorded 179 collisions on the B3021 from 1979 to 2025, with 237 casualties. Of those crashes, 6 were fatal and 27 serious, and 6 people were killed.

In 2025 there were 2 collisions on the B3021, down 33% from 3 in 2024, with 2 casualties.

Collisions since 1979
179
3,382nd highest of 4,923 roads
Casualties
237
1.32 per collision
Fatal collisions
6
6 people killed
Serious collisions
27
33 seriously injured
Collisions in 2025
2
Down 33% on 2024
Casualties in 2025
2
Down 50% on 2024

Crash severity on the B3021

On the B3021, 3.4% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal63.4%
  • Serious2715%
  • Slight14682%

Where the B3021 ranks among 4,923 roads

Most collisions
3,382nd
Most casualties
3,411th
Most fatal collisions
2,299th
Most serious collisions
3,732nd

B3021 accidents by year

Collisions on the B3021 peaked at 9 in 1980 and were down to 2 in 2025.

Collisions and casualties on the B3021, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202434
202311
202223
202100
202011
201946
201834
201711
2016511
201545
201412
201322
201225
201144
201045
200911
200833
200744
200645
200556
200411
200345
200245
200145
200056
199966
199833
199758
199668
1995712
199458
199336
1992711
199122
199045
198936
198822
198733
198666
198577
198478
198322
1982810
198133
1980910
1979714

When crashes happen on the B3021

Saturday has the most collisions on the B3021 (30), and 3pm to 6pm is the busiest time of day (32).

Collisions by day of the week

  • Monday21 (12%)
  • Tuesday24 (13%)
  • Wednesday27 (15%)
  • Thursday28 (16%)
  • Friday26 (15%)
  • Saturday30 (17%)
  • Sunday23 (13%)

Collisions by time of day

  • Midnight to 3am2 (1.1%)
  • 3am to 6am5 (2.8%)
  • 6am to 9am28 (16%)
  • 9am to noon30 (17%)
  • Noon to 3pm31 (17%)
  • 3pm to 6pm32 (18%)
  • 6pm to 9pm32 (18%)
  • 9pm to midnight19 (11%)

Collisions by month

  • January16 (8.9%)
  • February13 (7.3%)
  • March17 (9.5%)
  • April13 (7.3%)
  • May16 (8.9%)
  • June11 (6.1%)
  • July18 (10%)
  • August12 (6.7%)
  • September18 (10%)
  • October12 (6.7%)
  • November13 (7.3%)
  • December20 (11%)

Light conditions at the time

  • Daylight131 (73%)
  • Dark, street lights lit27 (15%)
  • Dark, no street lighting20 (11%)
  • Dark, lighting unknown1 (0.6%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B3021 crashes

On the B3021, 60% of collisions happened where the speed limit was 30 mph and 62% on a dry road surface.

Speed limit at the scene

  • 30 mph108 (60%)
  • 40 mph36 (20%)
  • 50 mph2 (1.1%)
  • 60 mph32 (18%)
  • 70 mph1 (0.6%)

Weather at the time

  • Fine, no high winds138 (77%)
  • Raining, no high winds24 (13%)
  • Fog or mist4 (2.2%)
  • Raining with high winds4 (2.2%)
  • Other8 (4.5%)
  • Not recorded1 (0.6%)

Road surface

  • Dry111 (62%)
  • Wet or damp58 (32%)
  • Frost or ice8 (4.5%)
  • Oil or diesel1 (0.6%)
  • Snow1 (0.6%)

Type of road

  • Single carriageway170 (95%)
  • Dual carriageway6 (3.4%)
  • One way street or slip road2 (1.1%)
  • Roundabout1 (0.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B3021 crashes

Car occupants make up 64% of the people killed or injured on the B3021, followed by motorcyclists (17%).

Casualties by road user

  • Car occupant152 (64%)
  • Motorcyclist41 (17%)
  • Pedestrian18 (7.6%)
  • Cyclist14 (5.9%)
  • Van occupant7 (3%)
  • Minibus occupant3 (1.3%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (0.4%)
  • Taxi or private hire car occupant1 (0.4%)

Vehicles involved

  • Car230 (72%)
  • Motorcycle44 (14%)
  • Van or goods vehicle up to 3.5 tonnes18 (5.6%)
  • Pedal cycle14 (4.4%)
  • Goods vehicle over 3.5 tonnes6 (1.9%)
  • Minibus3 (0.9%)
  • Bus or coach2 (0.6%)
  • Other3 (0.9%)

Casualties by age

  • 0 to 52 (0.8%)
  • 6 to 106 (2.5%)
  • 11 to 1514 (5.9%)
  • 16 to 2056 (24%)
  • 21 to 2521 (8.9%)
  • 26 to 3545 (19%)
  • 36 to 4531 (13%)
  • 46 to 5525 (11%)
  • 56 to 6513 (5.5%)
  • 66 to 756 (2.5%)
  • Over 757 (3%)
  • Not recorded11 (4.6%)

Drivers, passengers and pedestrians

  • Driver or rider162 (68%)
  • Passenger57 (24%)
  • Pedestrian18 (7.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B3021

Map of the 25 most recent crashes on the B3021

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B3021 crashes by council area

Of the 179 collisions on the B3021, 173 were in Windsor and Maidenhead.

Collisions on the B3021 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead173227525

B3021 crashes by town

Collisions on the B3021 were recorded in 2 towns and built-up areas, led by Old Windsor and Wraysbury (60) and Datchet (44).

Recent crashes on the B3021

These are the 25 most recent collisions on the B3021, from 10 July 2015 to 10 December 2025.

Severity