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CrashStats

B4308 accidents: crash map and statistics

Police recorded 368 collisions on the B4308 from 1979 to 2025, with 578 casualties. Of those crashes, 3 were fatal and 112 serious, and 5 people were killed.

In 2025 there were 4 collisions on the B4308, level with 2024, with 6 casualties.

Collisions since 1979
368
2,412th highest of 4,923 roads
Casualties
578
1.57 per collision
Fatal collisions
3
5 people killed
Serious collisions
112
154 seriously injured
Collisions in 2025
4
Level with 2024
Casualties in 2025
6
Down 33% on 2024

Crash severity on the B4308

On the B4308, 0.8% of collisions were fatal and 30% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal30.8%
  • Serious11230%
  • Slight25369%

Where the B4308 ranks among 4,923 roads

Most collisions
2,412th
Most casualties
2,205th
Most fatal collisions
3,114th
Most serious collisions
1,728th

B4308 accidents by year

Collisions on the B4308 peaked at 17 in 1986 and were down to 4 in 2025.

Collisions and casualties on the B4308, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202546
202449
2023911
202249
202167
202066
2019912
201869
201767
201645
201568
201422
201322
2012710
2011911
2010812
2009815
200833
2007810
20061316
2005612
20041324
20031014
2002712
20011014
200067
1999913
1998915
199768
1996712
199558
1994810
1993915
19921012
1991711
19901220
1989922
19881318
19871017
19861727
19851037
1984813
1983815
1982911
19811526
198068
197957

When crashes happen on the B4308

Friday has the most collisions on the B4308 (65), and 3pm to 6pm is the busiest time of day (71).

Collisions by day of the week

  • Monday45 (12%)
  • Tuesday49 (13%)
  • Wednesday44 (12%)
  • Thursday57 (15%)
  • Friday65 (18%)
  • Saturday53 (14%)
  • Sunday55 (15%)

Collisions by time of day

  • Midnight to 3am18 (4.9%)
  • 3am to 6am11 (3%)
  • 6am to 9am46 (13%)
  • 9am to noon59 (16%)
  • Noon to 3pm55 (15%)
  • 3pm to 6pm71 (19%)
  • 6pm to 9pm59 (16%)
  • 9pm to midnight49 (13%)

Collisions by month

  • January23 (6.3%)
  • February28 (7.6%)
  • March33 (9%)
  • April23 (6.3%)
  • May23 (6.3%)
  • June31 (8.4%)
  • July36 (9.8%)
  • August33 (9%)
  • September34 (9.2%)
  • October36 (9.8%)
  • November28 (7.6%)
  • December40 (11%)

Light conditions at the time

  • Daylight243 (66%)
  • Dark, no street lighting69 (19%)
  • Dark, street lights lit50 (14%)
  • Dark, lighting unknown3 (0.8%)
  • Dark, street lights unlit2 (0.5%)
  • Not recorded1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4308 crashes

On the B4308, 42% of collisions happened where the speed limit was 30 mph and 56% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (0.8%)
  • 30 mph154 (42%)
  • 40 mph28 (7.6%)
  • 50 mph30 (8.2%)
  • 60 mph153 (42%)

Weather at the time

  • Fine, no high winds265 (72%)
  • Raining, no high winds53 (14%)
  • Fine with high winds11 (3%)
  • Raining with high winds6 (1.6%)
  • Other28 (7.6%)
  • Not recorded5 (1.4%)

Road surface

  • Dry205 (56%)
  • Wet or damp145 (39%)
  • Frost or ice14 (3.8%)
  • Flood over 3cm deep2 (0.5%)
  • Snow1 (0.3%)
  • Not recorded1 (0.3%)

Type of road

  • Single carriageway351 (95%)
  • Dual carriageway5 (1.4%)
  • One way street or slip road5 (1.4%)
  • Roundabout5 (1.4%)
  • Not recorded2 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4308 crashes

Car occupants make up 71% of the people killed or injured on the B4308, followed by pedestrians (10%).

Casualties by road user

  • Car occupant409 (71%)
  • Pedestrian59 (10%)
  • Motorcyclist49 (8.5%)
  • Bus or coach occupant32 (5.5%)
  • Cyclist13 (2.2%)
  • Van occupant8 (1.4%)
  • Other vehicle occupant4 (0.7%)
  • Other4 (0.7%)

Vehicles involved

  • Car488 (79%)
  • Motorcycle44 (7.2%)
  • Van or goods vehicle up to 3.5 tonnes30 (4.9%)
  • Bus or coach15 (2.4%)
  • Pedal cycle15 (2.4%)
  • Goods vehicle over 3.5 tonnes10 (1.6%)
  • Other vehicle4 (0.7%)
  • Other9 (1.5%)

Casualties by age

  • 0 to 518 (3.1%)
  • 6 to 1021 (3.6%)
  • 11 to 1533 (5.7%)
  • 16 to 20136 (24%)
  • 21 to 2584 (15%)
  • 26 to 35108 (19%)
  • 36 to 4562 (11%)
  • 46 to 5545 (7.8%)
  • 56 to 6530 (5.2%)
  • 66 to 7525 (4.3%)
  • Over 7515 (2.6%)
  • Not recorded1 (0.2%)

Drivers, passengers and pedestrians

  • Driver or rider315 (54%)
  • Passenger204 (35%)
  • Pedestrian59 (10%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4308

Map of the 25 most recent crashes on the B4308

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

  • 25 crashes
  • Serious
  • Slight

B4308 crashes by council area

Of the 368 collisions on the B4308, 365 were in Carmarthenshire.

Collisions on the B4308 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stCarmarthenshire3655733112

B4308 crashes by town

Collisions on the B4308 were recorded in 2 towns and built-up areas, led by Llanelli (55) and Kidwelly (16).

Recent crashes on the B4308

These are the 25 most recent collisions on the B4308, from 17 April 2021 to 8 December 2025.

Severity