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CrashStats

A4055 accidents: crash map and statistics

Police recorded 1,579 collisions on the A4055 from 1979 to 2025, with 2,129 casualties. Of those crashes, 23 were fatal and 261 serious, and 25 people were killed.

In 2025 there were 13 collisions on the A4055, down 13% from 15 in 2024, with 19 casualties.

Collisions since 1979
1,579
715th highest of 4,923 roads
Casualties
2,129
1.35 per collision
Fatal collisions
23
25 people killed
Serious collisions
261
313 seriously injured
Collisions in 2025
13
Down 13% on 2024
Casualties in 2025
19
Down 37% on 2024

Crash severity on the A4055

On the A4055, 1.5% of collisions were fatal and 17% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal231.5%
  • Serious26117%
  • Slight1,29582%

Where the A4055 ranks among 4,923 roads

Most collisions
715th
Most casualties
715th
Most fatal collisions
870th
Most serious collisions
824th

A4055 accidents by year

Collisions on the A4055 peaked at 102 in 1979 and were down to 13 in 2025.

Collisions and casualties on the A4055, 1979 to 2025

  • Collisions
  • Collisions in 2025: 13
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251319
20241530
20231416
2022810
20211319
20201214
20192024
20181622
20171832
20162331
20152734
20142938
20132540
20122935
20112947
20101222
20093147
20081423
20072546
20062135
20053040
20042537
20033051
20022144
20012133
20001326
199967
199811
199766
199657
1995710
19943140
19931725
19922225
19912630
19905969
198998120
19884257
19877590
19866683
19856473
198482111
19837082
19827795
198189121
1980100129
1979102133

When crashes happen on the A4055

Friday has the most collisions on the A4055 (272), and 3pm to 6pm is the busiest time of day (400).

Collisions by day of the week

  • Monday225 (14%)
  • Tuesday215 (14%)
  • Wednesday224 (14%)
  • Thursday207 (13%)
  • Friday272 (17%)
  • Saturday247 (16%)
  • Sunday189 (12%)

Collisions by time of day

  • Midnight to 3am111 (7%)
  • 3am to 6am31 (2%)
  • 6am to 9am151 (9.6%)
  • 9am to noon197 (12%)
  • Noon to 3pm275 (17%)
  • 3pm to 6pm400 (25%)
  • 6pm to 9pm218 (14%)
  • 9pm to midnight196 (12%)

Collisions by month

  • January129 (8.2%)
  • February106 (6.7%)
  • March132 (8.4%)
  • April135 (8.5%)
  • May146 (9.2%)
  • June106 (6.7%)
  • July127 (8%)
  • August153 (9.7%)
  • September130 (8.2%)
  • October129 (8.2%)
  • November165 (10%)
  • December121 (7.7%)

Light conditions at the time

  • Daylight1,032 (65%)
  • Dark, street lights lit446 (28%)
  • Dark, no street lighting50 (3.2%)
  • Dark, lighting unknown29 (1.8%)
  • Dark, street lights unlit11 (0.7%)
  • Not recorded11 (0.7%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4055 crashes

On the A4055, 82% of collisions happened where the speed limit was 30 mph and 69% on a dry road surface.

Speed limit at the scene

  • 20 mph9 (0.6%)
  • 30 mph1,299 (82%)
  • 40 mph82 (5.2%)
  • 50 mph32 (2%)
  • 60 mph147 (9.3%)
  • 70 mph10 (0.6%)

Weather at the time

  • Fine, no high winds1,215 (77%)
  • Raining, no high winds254 (16%)
  • Raining with high winds26 (1.6%)
  • Fine with high winds20 (1.3%)
  • Other34 (2.2%)
  • Not recorded30 (1.9%)

Road surface

  • Dry1,089 (69%)
  • Wet or damp455 (29%)
  • Frost or ice19 (1.2%)
  • Snow3 (0.2%)
  • Other2 (0.1%)
  • Not recorded11 (0.7%)

Type of road

  • Single carriageway1,117 (71%)
  • Dual carriageway268 (17%)
  • Roundabout151 (9.6%)
  • One way street or slip road25 (1.6%)
  • Not recorded18 (1.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4055 crashes

Car occupants make up 57% of the people killed or injured on the A4055, followed by pedestrians (19%).

Casualties by road user

  • Car occupant1,204 (57%)
  • Pedestrian413 (19%)
  • Motorcyclist234 (11%)
  • Cyclist114 (5.4%)
  • Bus or coach occupant78 (3.7%)
  • Taxi or private hire car occupant46 (2.2%)
  • Van occupant23 (1.1%)
  • Other17 (0.8%)

Vehicles involved

  • Car2,021 (73%)
  • Motorcycle257 (9.3%)
  • Pedal cycle116 (4.2%)
  • Bus or coach114 (4.1%)
  • Van or goods vehicle up to 3.5 tonnes87 (3.1%)
  • Taxi or private hire car72 (2.6%)
  • Other93 (3.4%)
  • Not recorded2 (0.1%)

Casualties by age

  • 0 to 545 (2.1%)
  • 6 to 1059 (2.8%)
  • 11 to 15112 (5.3%)
  • 16 to 20409 (19%)
  • 21 to 25359 (17%)
  • 26 to 35377 (18%)
  • 36 to 45271 (13%)
  • 46 to 55190 (8.9%)
  • 56 to 65145 (6.8%)
  • 66 to 7587 (4.1%)
  • Over 7565 (3.1%)
  • Not recorded10 (0.5%)

Drivers, passengers and pedestrians

  • Driver or rider1,120 (53%)
  • Passenger596 (28%)
  • Pedestrian413 (19%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4055

Map of the 25 most recent crashes on the A4055

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4055 crashes by council area

Collisions on the A4055 were recorded in 2 council areas. Vale of Glamorgan has the most, with 1,039, followed by Cardiff (534).

Collisions on the A4055 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stVale of Glamorgan1,0391,46820162
2ndCardiff534655398

A4055 crashes by town

Collisions on the A4055 were recorded in 4 towns and built-up areas, led by Cardiff (465) and Barry, Vale of Glamorgan (437).

Recent crashes on the A4055

These are the 25 most recent collisions on the A4055, from 15 March 2024 to 19 December 2025.

Severity