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CrashStats

A478 accidents: crash map and statistics

Police recorded 1,365 collisions on the A478 from 1979 to 2025, with 2,184 casualties. Of those crashes, 28 were fatal and 466 serious, and 29 people were killed.

In 2025 there were 18 collisions on the A478, down 5% from 19 in 2024, with 23 casualties.

Collisions since 1979
1,365
813th highest of 4,923 roads
Casualties
2,184
1.60 per collision
Fatal collisions
28
29 people killed
Serious collisions
466
639 seriously injured
Collisions in 2025
18
Down 5% on 2024
Casualties in 2025
23
Down 8% on 2024

Crash severity on the A478

On the A478, 2.1% of collisions were fatal and 34% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal282.1%
  • Serious46634%
  • Slight87164%

Where the A478 ranks among 4,923 roads

Most collisions
813th
Most casualties
698th
Most fatal collisions
715th
Most serious collisions
461st

A478 accidents by year

Collisions on the A478 peaked at 47 in 1989 and were down to 18 in 2025.

Collisions and casualties on the A478, 1979 to 2025

  • Collisions
  • Collisions in 2025: 18
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251823
20241925
20231731
202289
20211132
20201416
20192126
20181930
20172433
20161820
20152233
20142136
20131721
20122136
20111516
20103593
20092435
20082127
20073354
20064160
20052742
20043445
20032735
20023052
20013256
20003760
19993257
19983868
19973649
19962950
19952939
19944574
19933452
19923958
19913868
19904366
198947106
19883446
19872646
19863152
19853758
19843960
19833859
19824577
19813045
19803348
19793660

When crashes happen on the A478

Saturday has the most collisions on the A478 (234), and 3pm to 6pm is the busiest time of day (300).

Collisions by day of the week

  • Monday186 (14%)
  • Tuesday205 (15%)
  • Wednesday180 (13%)
  • Thursday184 (13%)
  • Friday197 (14%)
  • Saturday234 (17%)
  • Sunday179 (13%)

Collisions by time of day

  • Midnight to 3am76 (5.6%)
  • 3am to 6am16 (1.2%)
  • 6am to 9am141 (10%)
  • 9am to noon272 (20%)
  • Noon to 3pm233 (17%)
  • 3pm to 6pm300 (22%)
  • 6pm to 9pm200 (15%)
  • 9pm to midnight127 (9.3%)

Collisions by month

  • January108 (7.9%)
  • February82 (6%)
  • March85 (6.2%)
  • April108 (7.9%)
  • May111 (8.1%)
  • June87 (6.4%)
  • July148 (11%)
  • August180 (13%)
  • September132 (9.7%)
  • October114 (8.4%)
  • November104 (7.6%)
  • December106 (7.8%)

Light conditions at the time

  • Daylight1,002 (73%)
  • Dark, no street lighting242 (18%)
  • Dark, street lights lit96 (7%)
  • Dark, lighting unknown11 (0.8%)
  • Dark, street lights unlit8 (0.6%)
  • Not recorded6 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A478 crashes

On the A478, 58% of collisions happened where the speed limit was 60 mph and 52% on a dry road surface.

Speed limit at the scene

  • 20 mph5 (0.4%)
  • 30 mph353 (26%)
  • 40 mph169 (12%)
  • 50 mph50 (3.7%)
  • 60 mph787 (58%)
  • 70 mph1 (0.1%)

Weather at the time

  • Fine, no high winds907 (66%)
  • Raining, no high winds280 (21%)
  • Raining with high winds51 (3.7%)
  • Fine with high winds31 (2.3%)
  • Other82 (6%)
  • Not recorded14 (1%)

Road surface

  • Dry704 (52%)
  • Wet or damp613 (45%)
  • Frost or ice26 (1.9%)
  • Snow7 (0.5%)
  • Other9 (0.7%)
  • Not recorded6 (0.4%)

Type of road

  • Single carriageway1,288 (94%)
  • One way street or slip road38 (2.8%)
  • Roundabout22 (1.6%)
  • Dual carriageway13 (1%)
  • Not recorded4 (0.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A478 crashes

Car occupants make up 74% of the people killed or injured on the A478, followed by motorcyclists (8.7%).

Casualties by road user

  • Car occupant1,626 (74%)
  • Motorcyclist189 (8.7%)
  • Pedestrian123 (5.6%)
  • Bus or coach occupant74 (3.4%)
  • Van occupant51 (2.3%)
  • Cyclist42 (1.9%)
  • Goods vehicle occupant (over 3.5 tonnes)33 (1.5%)
  • Other46 (2.1%)

Vehicles involved

  • Car1,843 (75%)
  • Motorcycle179 (7.3%)
  • Van or goods vehicle up to 3.5 tonnes133 (5.4%)
  • Goods vehicle over 3.5 tonnes128 (5.2%)
  • Pedal cycle46 (1.9%)
  • Other vehicle43 (1.8%)
  • Bus or coach30 (1.2%)
  • Other44 (1.8%)

Casualties by age

  • 0 to 547 (2.2%)
  • 6 to 1065 (3%)
  • 11 to 15167 (7.6%)
  • 16 to 20478 (22%)
  • 21 to 25309 (14%)
  • 26 to 35313 (14%)
  • 36 to 45232 (11%)
  • 46 to 55225 (10%)
  • 56 to 65169 (7.7%)
  • 66 to 75108 (4.9%)
  • Over 7569 (3.2%)
  • Not recorded2 (0.1%)

Drivers, passengers and pedestrians

  • Driver or rider1,262 (58%)
  • Passenger799 (37%)
  • Pedestrian123 (5.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A478

Map of the 25 most recent crashes on the A478

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A478 crashes by council area

Collisions on the A478 were recorded in 3 council areas. Pembrokeshire has the most, with 1,220, followed by Carmarthenshire (87) and Ceredigion (55).

Collisions on the A478 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stPembrokeshire1,2201,91124414
2ndCarmarthenshire87137136
3rdCeredigion55132314

A478 crashes by town

Collisions on the A478 were recorded in 4 towns and built-up areas, led by Wooden (109) and Tenby (84).

Recent crashes on the A478

These are the 25 most recent collisions on the A478, from 17 September 2024 to 9 December 2025.

Severity