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CrashStats

A4231 accidents: crash map and statistics

Police recorded 119 collisions on the A4231 from 1983 to 2025, with 192 casualties. Of those crashes, 8 were fatal and 19 serious, and 9 people were killed.

In 2025 there were 2 collisions on the A4231, down 33% from 3 in 2024, with 4 casualties.

Collisions since 1983
119
3,857th highest of 4,923 roads
Casualties
192
1.61 per collision
Fatal collisions
8
9 people killed
Serious collisions
19
27 seriously injured
Collisions in 2025
2
Down 33% on 2024
Casualties in 2025
4
Down 43% on 2024

Crash severity on the A4231

On the A4231, 6.7% of collisions were fatal and 16% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1983 to 2025

  • Fatal86.7%
  • Serious1916%
  • Slight9277%

Where the A4231 ranks among 4,923 roads

Most collisions
3,857th
Most casualties
3,670th
Most fatal collisions
1,937th
Most serious collisions
4,084th

A4231 accidents by year

Collisions on the A4231 peaked at 11 in 2005 and were down to 2 in 2025.

Collisions and casualties on the A4231, 1983 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202524
202437
202312
202211
202123
202034
201900
201833
201733
201634
201511
201424
201344
201266
201122
201022
2009513
200823
200746
200669
20051118
200446
200336
200255
2001511
2000513
199900
199826
199723
199623
199500
199423
199348
199211
199135
199000
198944
198858
198700
198624
198512
198424
198311

When crashes happen on the A4231

Tuesday has the most collisions on the A4231 (21), and 3pm to 6pm is the busiest time of day (30).

Collisions by day of the week

  • Monday19 (16%)
  • Tuesday21 (18%)
  • Wednesday19 (16%)
  • Thursday17 (14%)
  • Friday14 (12%)
  • Saturday9 (7.6%)
  • Sunday20 (17%)

Collisions by time of day

  • Midnight to 3am5 (4.2%)
  • 3am to 6am3 (2.5%)
  • 6am to 9am18 (15%)
  • 9am to noon10 (8.4%)
  • Noon to 3pm20 (17%)
  • 3pm to 6pm30 (25%)
  • 6pm to 9pm21 (18%)
  • 9pm to midnight12 (10%)

Collisions by month

  • January13 (11%)
  • February11 (9.2%)
  • March5 (4.2%)
  • April5 (4.2%)
  • May15 (13%)
  • June9 (7.6%)
  • July9 (7.6%)
  • August8 (6.7%)
  • September14 (12%)
  • October6 (5%)
  • November14 (12%)
  • December10 (8.4%)

Light conditions at the time

  • Daylight76 (64%)
  • Dark, street lights lit34 (29%)
  • Dark, lighting unknown3 (2.5%)
  • Dark, street lights unlit3 (2.5%)
  • Dark, no street lighting2 (1.7%)
  • Not recorded1 (0.8%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4231 crashes

On the A4231, 44% of collisions happened where the speed limit was 50 mph and 70% on a dry road surface.

Speed limit at the scene

  • 30 mph10 (8.4%)
  • 40 mph5 (4.2%)
  • 50 mph52 (44%)
  • 60 mph51 (43%)
  • 70 mph1 (0.8%)

Weather at the time

  • Fine, no high winds97 (82%)
  • Raining, no high winds14 (12%)
  • Fine with high winds4 (3.4%)
  • Fog or mist1 (0.8%)
  • Other2 (1.7%)
  • Not recorded1 (0.8%)

Road surface

  • Dry83 (70%)
  • Wet or damp34 (29%)
  • Snow1 (0.8%)
  • Not recorded1 (0.8%)

Type of road

  • Single carriageway65 (55%)
  • Dual carriageway34 (29%)
  • Roundabout16 (13%)
  • One way street or slip road4 (3.4%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4231 crashes

Car occupants make up 84% of the people killed or injured on the A4231, followed by motorcyclists (7.3%).

Casualties by road user

  • Car occupant161 (84%)
  • Motorcyclist14 (7.3%)
  • Cyclist8 (4.2%)
  • Pedestrian5 (2.6%)
  • Goods vehicle occupant (over 3.5 tonnes)2 (1%)
  • Van occupant2 (1%)

Vehicles involved

  • Car198 (85%)
  • Motorcycle13 (5.6%)
  • Pedal cycle8 (3.4%)
  • Van or goods vehicle up to 3.5 tonnes7 (3%)
  • Goods vehicle over 3.5 tonnes4 (1.7%)
  • Other vehicle2 (0.9%)
  • Minibus1 (0.4%)

Casualties by age

  • 0 to 54 (2.1%)
  • 6 to 102 (1%)
  • 11 to 151 (0.5%)
  • 16 to 2039 (20%)
  • 21 to 2527 (14%)
  • 26 to 3533 (17%)
  • 36 to 4537 (19%)
  • 46 to 5517 (8.9%)
  • 56 to 6514 (7.3%)
  • 66 to 7510 (5.2%)
  • Over 758 (4.2%)

Drivers, passengers and pedestrians

  • Driver or rider134 (70%)
  • Passenger53 (28%)
  • Pedestrian5 (2.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4231

Map of the 25 most recent crashes on the A4231

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

  • 25 crashes
  • Fatal
  • Slight

A4231 crashes by council area

Of the 119 collisions on the A4231, 118 were in Vale of Glamorgan.

Collisions on the A4231 in each area, 1983 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stVale of Glamorgan118191819

A4231 crashes by town

Of the 119 collisions on the A4231, 31 were in the built-up area of Barry, Vale of Glamorgan.

Recent crashes on the A4231

These are the 25 most recent collisions on the A4231, from 17 December 2013 to 25 September 2025.

Severity