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CrashStats

B4001 accidents: crash map and statistics

Police recorded 131 collisions on the B4001 from 1979 to 2025, with 181 casualties. Of those crashes, 6 were fatal and 36 serious, and 6 people were killed.

In 2025 there were 2 collisions on the B4001, level with 2024, with 2 casualties.

Collisions since 1979
131
3,753rd highest of 4,923 roads
Casualties
181
1.38 per collision
Fatal collisions
6
6 people killed
Serious collisions
36
49 seriously injured
Collisions in 2025
2
Level with 2024
Casualties in 2025
2
Level with 2024

Crash severity on the B4001

On the B4001, 4.6% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal64.6%
  • Serious3627%
  • Slight8968%

Where the B4001 ranks among 4,923 roads

Most collisions
3,753rd
Most casualties
3,731st
Most fatal collisions
2,299th
Most serious collisions
3,408th

B4001 accidents by year

Collisions on the B4001 peaked at 6 in 2019 and were down to 2 in 2025.

Collisions and casualties on the B4001, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202422
202322
202200
202100
202022
201967
201822
201734
201600
201523
201433
201366
201245
201134
201011
200945
200833
200733
200600
200566
200434
200335
200223
200133
200022
199934
199847
199734
199622
199525
199400
199347
199236
199122
1990610
198911
198833
198734
198636
198534
198447
198334
198249
198158
198014
197957

When crashes happen on the B4001

Sunday has the most collisions on the B4001 (27), and 3pm to 6pm is the busiest time of day (30).

Collisions by day of the week

  • Monday15 (11%)
  • Tuesday15 (11%)
  • Wednesday18 (14%)
  • Thursday13 (9.9%)
  • Friday17 (13%)
  • Saturday26 (20%)
  • Sunday27 (21%)

Collisions by time of day

  • Midnight to 3am4 (3.1%)
  • 3am to 6am1 (0.8%)
  • 6am to 9am16 (12%)
  • 9am to noon22 (17%)
  • Noon to 3pm26 (20%)
  • 3pm to 6pm30 (23%)
  • 6pm to 9pm19 (15%)
  • 9pm to midnight13 (9.9%)

Collisions by month

  • January15 (11%)
  • February8 (6.1%)
  • March9 (6.9%)
  • April11 (8.4%)
  • May12 (9.2%)
  • June8 (6.1%)
  • July8 (6.1%)
  • August17 (13%)
  • September12 (9.2%)
  • October19 (15%)
  • November6 (4.6%)
  • December6 (4.6%)

Light conditions at the time

  • Daylight99 (76%)
  • Dark, no street lighting27 (21%)
  • Dark, street lights lit4 (3.1%)
  • Dark, lighting unknown1 (0.8%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4001 crashes

On the B4001, 79% of collisions happened where the speed limit was 60 mph and 66% on a dry road surface.

Speed limit at the scene

  • 20 mph1 (0.8%)
  • 30 mph21 (16%)
  • 50 mph6 (4.6%)
  • 60 mph103 (79%)

Weather at the time

  • Fine, no high winds107 (82%)
  • Raining, no high winds12 (9.2%)
  • Fine with high winds3 (2.3%)
  • Snowing, no high winds3 (2.3%)
  • Fog or mist1 (0.8%)
  • Other5 (3.8%)

Road surface

  • Dry86 (66%)
  • Wet or damp36 (27%)
  • Frost or ice6 (4.6%)
  • Snow3 (2.3%)

Type of road

  • Single carriageway128 (98%)
  • Dual carriageway3 (2.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4001 crashes

Car occupants make up 70% of the people killed or injured on the B4001, followed by motorcyclists (13%).

Casualties by road user

  • Car occupant127 (70%)
  • Motorcyclist23 (13%)
  • Cyclist12 (6.6%)
  • Pedestrian8 (4.4%)
  • Van occupant6 (3.3%)
  • Other vehicle occupant3 (1.7%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (0.6%)
  • Horse rider1 (0.6%)

Vehicles involved

  • Car144 (67%)
  • Motorcycle21 (9.7%)
  • Van or goods vehicle up to 3.5 tonnes15 (6.9%)
  • Goods vehicle over 3.5 tonnes12 (5.6%)
  • Pedal cycle12 (5.6%)
  • Other vehicle7 (3.2%)
  • Agricultural vehicle2 (0.9%)
  • Other3 (1.4%)

Casualties by age

  • 0 to 52 (1.1%)
  • 6 to 102 (1.1%)
  • 11 to 152 (1.1%)
  • 16 to 2048 (27%)
  • 21 to 2533 (18%)
  • 26 to 3531 (17%)
  • 36 to 4513 (7.2%)
  • 46 to 5518 (9.9%)
  • 56 to 6518 (9.9%)
  • 66 to 756 (3.3%)
  • Over 757 (3.9%)
  • Not recorded1 (0.6%)

Drivers, passengers and pedestrians

  • Driver or rider120 (66%)
  • Passenger53 (29%)
  • Pedestrian8 (4.4%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4001

Map of the 25 most recent crashes on the B4001

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

  • 25 crashes
  • Serious
  • Slight

B4001 crashes by council area

Collisions on the B4001 were recorded in 3 council areas. West Berkshire has the most, with 71, followed by Vale of White Horse (44) and Wiltshire (16).

Collisions on the B4001 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWest Berkshire71103422
2ndVale of White Horse4459211
3rdWiltshire161903

B4001 crashes by town

Of the 131 collisions on the B4001, 20 were in the built-up area of Lambourn.

Recent crashes on the B4001

These are the 25 most recent collisions on the B4001, from 14 November 2013 to 24 September 2025.

Severity