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CrashStats

B4000 accidents: crash map and statistics

Police recorded 578 collisions on the B4000 from 1979 to 2025, with 870 casualties. Of those crashes, 22 were fatal and 142 serious, and 24 people were killed.

In 2025 there were 12 collisions on the B4000, up 140% from 5 in 2024, with 16 casualties.

Collisions since 1979
578
1,746th highest of 4,923 roads
Casualties
870
1.51 per collision
Fatal collisions
22
24 people killed
Serious collisions
142
179 seriously injured
Collisions in 2025
12
Up 140% on 2024
Casualties in 2025
16
Up 45% on 2024

Crash severity on the B4000

On the B4000, 3.8% of collisions were fatal and 25% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal223.8%
  • Serious14225%
  • Slight41472%

Where the B4000 ranks among 4,923 roads

Most collisions
1,746th
Most casualties
1,604th
Most fatal collisions
902nd
Most serious collisions
1,437th

B4000 accidents by year

Collisions on the B4000 peaked at 23 in 1986 and were down to 12 in 2025.

Collisions and casualties on the B4000, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251216
2024511
2023916
2022814
202146
202099
201969
20181113
201756
2016916
2015912
20141416
2013911
20121315
20111321
20101724
2009814
20081217
20071414
2006912
20051219
20041219
20031931
20021219
20011317
20001933
19991320
19981224
19971921
19961731
19951219
19941727
19931628
19921623
1991912
19901219
19891830
19881427
198755
19862333
19851523
19841219
19831218
19821528
19811417
19801217
19791219

When crashes happen on the B4000

Friday has the most collisions on the B4000 (103), and noon to 3pm is the busiest time of day (109).

Collisions by day of the week

  • Monday74 (13%)
  • Tuesday77 (13%)
  • Wednesday85 (15%)
  • Thursday77 (13%)
  • Friday103 (18%)
  • Saturday92 (16%)
  • Sunday70 (12%)

Collisions by time of day

  • Midnight to 3am27 (4.7%)
  • 3am to 6am11 (1.9%)
  • 6am to 9am98 (17%)
  • 9am to noon75 (13%)
  • Noon to 3pm109 (19%)
  • 3pm to 6pm108 (19%)
  • 6pm to 9pm87 (15%)
  • 9pm to midnight63 (11%)

Collisions by month

  • January45 (7.8%)
  • February46 (8%)
  • March41 (7.1%)
  • April45 (7.8%)
  • May49 (8.5%)
  • June47 (8.1%)
  • July52 (9%)
  • August48 (8.3%)
  • September53 (9.2%)
  • October49 (8.5%)
  • November50 (8.7%)
  • December53 (9.2%)

Light conditions at the time

  • Daylight409 (71%)
  • Dark, no street lighting144 (25%)
  • Dark, street lights lit18 (3.1%)
  • Dark, lighting unknown6 (1%)
  • Not recorded1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4000 crashes

On the B4000, 68% of collisions happened where the speed limit was 60 mph and 60% on a dry road surface.

Speed limit at the scene

  • 20 mph1 (0.2%)
  • 30 mph90 (16%)
  • 40 mph29 (5%)
  • 50 mph64 (11%)
  • 60 mph391 (68%)
  • 70 mph3 (0.5%)

Weather at the time

  • Fine, no high winds453 (78%)
  • Raining, no high winds66 (11%)
  • Fog or mist15 (2.6%)
  • Fine with high winds12 (2.1%)
  • Other30 (5.2%)
  • Not recorded2 (0.3%)

Road surface

  • Dry344 (60%)
  • Wet or damp190 (33%)
  • Frost or ice38 (6.6%)
  • Flood over 3cm deep3 (0.5%)
  • Snow2 (0.3%)
  • Not recorded1 (0.2%)

Type of road

  • Single carriageway567 (98%)
  • Dual carriageway11 (1.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4000 crashes

Car occupants make up 73% of the people killed or injured on the B4000, followed by motorcyclists (11%).

Casualties by road user

  • Car occupant632 (73%)
  • Motorcyclist93 (11%)
  • Cyclist37 (4.3%)
  • Pedestrian35 (4%)
  • Van occupant33 (3.8%)
  • Goods vehicle occupant (over 3.5 tonnes)9 (1%)
  • Other vehicle occupant9 (1%)
  • Other22 (2.5%)

Vehicles involved

  • Car742 (73%)
  • Motorcycle92 (9%)
  • Van or goods vehicle up to 3.5 tonnes69 (6.8%)
  • Pedal cycle37 (3.6%)
  • Goods vehicle over 3.5 tonnes31 (3%)
  • Other vehicle20 (2%)
  • Other25 (2.5%)
  • Not recorded2 (0.2%)

Casualties by age

  • 0 to 513 (1.5%)
  • 6 to 1016 (1.8%)
  • 11 to 1517 (2%)
  • 16 to 20178 (20%)
  • 21 to 25122 (14%)
  • 26 to 35145 (17%)
  • 36 to 45122 (14%)
  • 46 to 55101 (12%)
  • 56 to 6572 (8.3%)
  • 66 to 7546 (5.3%)
  • Over 7522 (2.5%)
  • Not recorded16 (1.8%)

Drivers, passengers and pedestrians

  • Driver or rider590 (68%)
  • Passenger245 (28%)
  • Pedestrian35 (4%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4000

Map of the 25 most recent crashes on the B4000

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4000 crashes by council area

Collisions on the B4000 were recorded in 3 council areas. West Berkshire has the most, with 411, followed by Vale of White Horse (99) and Swindon (63).

Collisions on the B4000 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWest Berkshire41162321105
2ndVale of White Horse99141123
3rdSwindon63100013

B4000 crashes by town

Collisions on the B4000 were recorded in 3 towns and built-up areas, led by Lambourn (46) and Highworth (11).

Recent crashes on the B4000

These are the 25 most recent collisions on the B4000, from 18 February 2023 to 6 December 2025.

Severity