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CrashStats

B4039 accidents: crash map and statistics

Police recorded 242 collisions on the B4039 from 1979 to 2025, with 373 casualties. Of those crashes, 9 were fatal and 65 serious, and 9 people were killed.

In 2025 there were 4 collisions on the B4039, up 100% from 2 in 2024, with 6 casualties.

Collisions since 1979
242
2,996th highest of 4,923 roads
Casualties
373
1.54 per collision
Fatal collisions
9
9 people killed
Serious collisions
65
79 seriously injured
Collisions in 2025
4
Up 100% on 2024
Casualties in 2025
6
Up 200% on 2024

Crash severity on the B4039

On the B4039, 3.7% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal93.7%
  • Serious6527%
  • Slight16869%

Where the B4039 ranks among 4,923 roads

Most collisions
2,996th
Most casualties
2,822nd
Most fatal collisions
1,807th
Most serious collisions
2,586th

B4039 accidents by year

Collisions on the B4039 peaked at 12 in 1991 and were down to 4 in 2025.

Collisions and casualties on the B4039, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202546
202422
202359
202213
202124
202011
201912
2018714
201733
201638
201535
2014410
201325
201224
201111
201033
200911
200846
200757
200657
2005813
200444
2003812
200257
200125
200034
199968
1998911
19971017
1996811
199534
19941011
19931126
1992713
19911217
1990910
198977
1988917
198748
198667
198579
1984815
198366
1982811
198136
198034
197979

When crashes happen on the B4039

Friday has the most collisions on the B4039 (41), and 3pm to 6pm is the busiest time of day (58).

Collisions by day of the week

  • Monday25 (10%)
  • Tuesday29 (12%)
  • Wednesday35 (14%)
  • Thursday37 (15%)
  • Friday41 (17%)
  • Saturday40 (17%)
  • Sunday35 (14%)

Collisions by time of day

  • Midnight to 3am9 (3.7%)
  • 3am to 6am3 (1.2%)
  • 6am to 9am35 (14%)
  • 9am to noon42 (17%)
  • Noon to 3pm38 (16%)
  • 3pm to 6pm58 (24%)
  • 6pm to 9pm32 (13%)
  • 9pm to midnight25 (10%)

Collisions by month

  • January21 (8.7%)
  • February13 (5.4%)
  • March16 (6.6%)
  • April15 (6.2%)
  • May20 (8.3%)
  • June23 (9.5%)
  • July27 (11%)
  • August20 (8.3%)
  • September20 (8.3%)
  • October25 (10%)
  • November23 (9.5%)
  • December19 (7.9%)

Light conditions at the time

  • Daylight179 (74%)
  • Dark, no street lighting58 (24%)
  • Dark, street lights lit5 (2.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4039 crashes

On the B4039, 69% of collisions happened where the speed limit was 60 mph and 51% on a dry road surface.

Speed limit at the scene

  • 30 mph30 (12%)
  • 40 mph14 (5.8%)
  • 50 mph23 (9.5%)
  • 60 mph167 (69%)
  • 70 mph7 (2.9%)
  • Not recorded1 (0.4%)

Weather at the time

  • Fine, no high winds183 (76%)
  • Raining, no high winds43 (18%)
  • Fine with high winds6 (2.5%)
  • Fog or mist4 (1.7%)
  • Other5 (2.1%)
  • Not recorded1 (0.4%)

Road surface

  • Dry123 (51%)
  • Wet or damp102 (42%)
  • Frost or ice15 (6.2%)
  • Flood over 3cm deep1 (0.4%)
  • Oil or diesel1 (0.4%)

Type of road

  • Single carriageway239 (99%)
  • Dual carriageway3 (1.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4039 crashes

Car occupants make up 77% of the people killed or injured on the B4039, followed by motorcyclists (11%).

Casualties by road user

  • Car occupant289 (77%)
  • Motorcyclist41 (11%)
  • Pedestrian13 (3.5%)
  • Cyclist12 (3.2%)
  • Van occupant9 (2.4%)
  • Goods vehicle occupant (over 3.5 tonnes)3 (0.8%)
  • Bus or coach occupant2 (0.5%)
  • Other4 (1.1%)

Vehicles involved

  • Car319 (74%)
  • Motorcycle44 (10%)
  • Van or goods vehicle up to 3.5 tonnes20 (4.7%)
  • Goods vehicle over 3.5 tonnes16 (3.7%)
  • Pedal cycle12 (2.8%)
  • Other vehicle9 (2.1%)
  • Bus or coach3 (0.7%)
  • Other6 (1.4%)

Casualties by age

  • 0 to 52 (0.5%)
  • 6 to 1011 (2.9%)
  • 11 to 1513 (3.5%)
  • 16 to 20103 (28%)
  • 21 to 2555 (15%)
  • 26 to 3568 (18%)
  • 36 to 4538 (10%)
  • 46 to 5534 (9.1%)
  • 56 to 6524 (6.4%)
  • 66 to 7517 (4.6%)
  • Over 758 (2.1%)

Drivers, passengers and pedestrians

  • Driver or rider254 (68%)
  • Passenger106 (28%)
  • Pedestrian13 (3.5%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4039

Map of the 25 most recent crashes on the B4039

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4039 crashes by council area

Collisions on the B4039 were recorded in 3 council areas. Wiltshire has the most, with 226, followed by South Gloucestershire (10) and Carmarthenshire (4).

Collisions on the B4039 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWiltshire226347758
2ndSouth Gloucestershire101723
3rdCarmarthenshire4603

Recent crashes on the B4039

These are the 25 most recent collisions on the B4039, from 22 June 2017 to 17 October 2025.

Severity