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CrashStats

B4040 accidents: crash map and statistics

Police recorded 810 collisions on the B4040 from 1979 to 2025, with 1,214 casualties. Of those crashes, 22 were fatal and 210 serious, and 23 people were killed.

In 2025 there were 10 collisions on the B4040, up 11% from 9 in 2024, with 15 casualties.

Collisions since 1979
810
1,316th highest of 4,923 roads
Casualties
1,214
1.50 per collision
Fatal collisions
22
23 people killed
Serious collisions
210
269 seriously injured
Collisions in 2025
10
Up 11% on 2024
Casualties in 2025
15
Up 15% on 2024

Crash severity on the B4040

On the B4040, 2.7% of collisions were fatal and 26% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal222.7%
  • Serious21026%
  • Slight57871%

Where the B4040 ranks among 4,923 roads

Most collisions
1,316th
Most casualties
1,206th
Most fatal collisions
902nd
Most serious collisions
1,006th

B4040 accidents by year

Collisions on the B4040 peaked at 36 in 1986 and were down to 10 in 2025.

Collisions and casualties on the B4040, 1979 to 2025

  • Collisions
  • Collisions in 2025: 10
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251015
2024913
20231013
202269
20211520
202033
201944
2018811
201789
20161118
20151518
201479
20131419
2012913
20111220
20101115
2009911
2008910
20071524
20061631
20051012
20041115
20031820
20021824
20012436
20002536
19992339
19981729
19972638
19962025
19951627
19941929
19931725
19922230
19911628
19902951
19893455
19882031
19872234
19863650
19852231
19842853
19832344
19823460
19812837
19802432
19792738

When crashes happen on the B4040

Wednesday has the most collisions on the B4040 (132), and 3pm to 6pm is the busiest time of day (192).

Collisions by day of the week

  • Monday123 (15%)
  • Tuesday126 (16%)
  • Wednesday132 (16%)
  • Thursday103 (13%)
  • Friday115 (14%)
  • Saturday117 (14%)
  • Sunday94 (12%)

Collisions by time of day

  • Midnight to 3am28 (3.5%)
  • 3am to 6am20 (2.5%)
  • 6am to 9am113 (14%)
  • 9am to noon98 (12%)
  • Noon to 3pm132 (16%)
  • 3pm to 6pm192 (24%)
  • 6pm to 9pm142 (18%)
  • 9pm to midnight85 (10%)

Collisions by month

  • January67 (8.3%)
  • February62 (7.7%)
  • March58 (7.2%)
  • April59 (7.3%)
  • May68 (8.4%)
  • June73 (9%)
  • July72 (8.9%)
  • August72 (8.9%)
  • September80 (9.9%)
  • October81 (10%)
  • November60 (7.4%)
  • December58 (7.2%)

Light conditions at the time

  • Daylight565 (70%)
  • Dark, no street lighting197 (24%)
  • Dark, street lights lit42 (5.2%)
  • Dark, lighting unknown3 (0.4%)
  • Dark, street lights unlit3 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4040 crashes

On the B4040, 63% of collisions happened where the speed limit was 60 mph and 63% on a dry road surface.

Speed limit at the scene

  • 20 mph8 (1%)
  • 30 mph174 (21%)
  • 40 mph35 (4.3%)
  • 50 mph64 (7.9%)
  • 60 mph507 (63%)
  • 70 mph22 (2.7%)

Weather at the time

  • Fine, no high winds640 (79%)
  • Raining, no high winds96 (12%)
  • Fog or mist23 (2.8%)
  • Fine with high winds21 (2.6%)
  • Other23 (2.8%)
  • Not recorded7 (0.9%)

Road surface

  • Dry512 (63%)
  • Wet or damp268 (33%)
  • Frost or ice19 (2.3%)
  • Snow5 (0.6%)
  • Flood over 3cm deep3 (0.4%)
  • Other3 (0.4%)

Type of road

  • Single carriageway782 (97%)
  • Roundabout16 (2%)
  • One way street or slip road8 (1%)
  • Dual carriageway4 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4040 crashes

Car occupants make up 70% of the people killed or injured on the B4040, followed by motorcyclists (13%).

Casualties by road user

  • Car occupant855 (70%)
  • Motorcyclist154 (13%)
  • Pedestrian62 (5.1%)
  • Cyclist51 (4.2%)
  • Van occupant51 (4.2%)
  • Goods vehicle occupant (over 3.5 tonnes)23 (1.9%)
  • Bus or coach occupant5 (0.4%)
  • Other13 (1.1%)

Vehicles involved

  • Car974 (72%)
  • Motorcycle149 (11%)
  • Van or goods vehicle up to 3.5 tonnes79 (5.8%)
  • Goods vehicle over 3.5 tonnes59 (4.3%)
  • Pedal cycle54 (4%)
  • Other vehicle19 (1.4%)
  • Bus or coach10 (0.7%)
  • Other14 (1%)

Casualties by age

  • 0 to 523 (1.9%)
  • 6 to 1027 (2.2%)
  • 11 to 1545 (3.7%)
  • 16 to 20272 (22%)
  • 21 to 25152 (13%)
  • 26 to 35224 (18%)
  • 36 to 45174 (14%)
  • 46 to 55124 (10%)
  • 56 to 6587 (7.2%)
  • 66 to 7555 (4.5%)
  • Over 7531 (2.6%)

Drivers, passengers and pedestrians

  • Driver or rider821 (68%)
  • Passenger331 (27%)
  • Pedestrian62 (5.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4040

Map of the 25 most recent crashes on the B4040

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

  • 25 crashes
  • Serious
  • Slight

B4040 crashes by council area

Collisions on the B4040 were recorded in 2 council areas. Wiltshire has the most, with 721, followed by South Gloucestershire (89).

Collisions on the B4040 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWiltshire7211,07518181
2ndSouth Gloucestershire89139429

B4040 crashes by town

Collisions on the B4040 were recorded in 3 towns and built-up areas, led by Malmesbury (75) and Cricklade (47).

Recent crashes on the B4040

These are the 25 most recent collisions on the B4040, from 8 April 2023 to 29 November 2025.

Severity