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CrashStats

B4143 accidents: crash map and statistics

Police recorded 283 collisions on the B4143 from 1984 to 2025, with 353 casualties. Of those crashes, 2 were fatal and 42 serious, and 2 people were killed.

In 2025 there were 7 collisions on the B4143, up 133% from 3 in 2024, with 10 casualties.

Collisions since 1984
283
2,787th highest of 4,923 roads
Casualties
353
1.25 per collision
Fatal collisions
2
2 people killed
Serious collisions
42
43 seriously injured
Collisions in 2025
7
Up 133% on 2024
Casualties in 2025
10
Up 233% on 2024

Crash severity on the B4143

On the B4143, 0.7% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1984 to 2025

  • Fatal20.7%
  • Serious4215%
  • Slight23984%

Where the B4143 ranks among 4,923 roads

Most collisions
2,787th
Most casualties
2,902nd
Most fatal collisions
3,485th
Most serious collisions
3,204th

B4143 accidents by year

Collisions on the B4143 peaked at 22 in 1984 and were down to 7 in 2025.

Collisions and casualties on the B4143, 1984 to 2025

  • Collisions
  • Collisions in 2025: 7
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025710
202433
202356
202259
202123
202033
201988
201822
201789
201645
201522
201445
201356
201245
201122
201055
2009910
2008911
200733
200667
200558
200445
200344
20021213
200159
200023
1999813
199878
199778
19961216
1995711
199479
199367
19921013
199157
19901111
19891421
198844
198755
19861418
19851622
19842224

When crashes happen on the B4143

Friday has the most collisions on the B4143 (59), and 3pm to 6pm is the busiest time of day (70).

Collisions by day of the week

  • Monday34 (12%)
  • Tuesday45 (16%)
  • Wednesday48 (17%)
  • Thursday53 (19%)
  • Friday59 (21%)
  • Saturday29 (10%)
  • Sunday15 (5.3%)

Collisions by time of day

  • Midnight to 3am4 (1.4%)
  • 3am to 6am6 (2.1%)
  • 6am to 9am55 (19%)
  • 9am to noon32 (11%)
  • Noon to 3pm63 (22%)
  • 3pm to 6pm70 (25%)
  • 6pm to 9pm31 (11%)
  • 9pm to midnight22 (7.8%)

Collisions by month

  • January18 (6.4%)
  • February29 (10%)
  • March14 (4.9%)
  • April23 (8.1%)
  • May22 (7.8%)
  • June22 (7.8%)
  • July23 (8.1%)
  • August22 (7.8%)
  • September25 (8.8%)
  • October26 (9.2%)
  • November34 (12%)
  • December25 (8.8%)

Light conditions at the time

  • Daylight213 (75%)
  • Dark, street lights lit66 (23%)
  • Dark, street lights unlit3 (1.1%)
  • Dark, no street lighting1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4143 crashes

On the B4143, 94% of collisions happened where the speed limit was 30 mph and 68% on a dry road surface.

Speed limit at the scene

  • 30 mph266 (94%)
  • 40 mph15 (5.3%)
  • 60 mph2 (0.7%)

Weather at the time

  • Fine, no high winds227 (80%)
  • Raining, no high winds40 (14%)
  • Fine with high winds4 (1.4%)
  • Raining with high winds4 (1.4%)
  • Other4 (1.4%)
  • Not recorded4 (1.4%)

Road surface

  • Dry193 (68%)
  • Wet or damp85 (30%)
  • Frost or ice3 (1.1%)
  • Flood over 3cm deep1 (0.4%)
  • Snow1 (0.4%)

Type of road

  • Single carriageway218 (77%)
  • Roundabout59 (21%)
  • Dual carriageway6 (2.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4143 crashes

Car occupants make up 50% of the people killed or injured on the B4143, followed by motorcyclists (22%).

Casualties by road user

  • Car occupant178 (50%)
  • Motorcyclist77 (22%)
  • Cyclist60 (17%)
  • Pedestrian27 (7.6%)
  • Van occupant4 (1.1%)
  • Goods vehicle occupant (over 3.5 tonnes)2 (0.6%)
  • Other4 (1.1%)
  • Not recorded1 (0.3%)

Vehicles involved

  • Car367 (63%)
  • Motorcycle78 (13%)
  • Pedal cycle63 (11%)
  • Van or goods vehicle up to 3.5 tonnes43 (7.4%)
  • Goods vehicle over 3.5 tonnes21 (3.6%)
  • Other vehicle4 (0.7%)
  • Bus or coach3 (0.5%)
  • Other5 (0.9%)

Casualties by age

  • 0 to 56 (1.7%)
  • 6 to 108 (2.3%)
  • 11 to 1516 (4.5%)
  • 16 to 2062 (18%)
  • 21 to 2545 (13%)
  • 26 to 3562 (18%)
  • 36 to 4559 (17%)
  • 46 to 5544 (12%)
  • 56 to 6535 (9.9%)
  • 66 to 756 (1.7%)
  • Over 759 (2.5%)
  • Not recorded1 (0.3%)

Drivers, passengers and pedestrians

  • Driver or rider264 (75%)
  • Passenger62 (18%)
  • Pedestrian27 (7.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4143

Map of the 25 most recent crashes on the B4143

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

  • 25 crashes
  • Serious
  • Slight

B4143 crashes by council area

All 283 collisions on the B4143 were in Swindon.

Collisions on the B4143 in each area, 1984 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSwindon283353242

B4143 crashes by town

Collisions on the B4143 were recorded in 2 towns and built-up areas, led by Stratton St Margaret (137) and Swindon, Swindon (133).

Recent crashes on the B4143

These are the 25 most recent collisions on the B4143, from 20 February 2020 to 27 December 2025.

Severity