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CrashStats

B4310 accidents: crash map and statistics

Police recorded 275 collisions on the B4310 from 1979 to 2025, with 385 casualties. Of those crashes, 8 were fatal and 92 serious, and 9 people were killed.

In 2025 there were 10 collisions on the B4310, up 900% from 1 in 2024, with 13 casualties.

Collisions since 1979
275
2,819th highest of 4,923 roads
Casualties
385
1.40 per collision
Fatal collisions
8
9 people killed
Serious collisions
92
105 seriously injured
Collisions in 2025
10
Up 900% on 2024
Casualties in 2025
13
Up 1,200% on 2024

Crash severity on the B4310

On the B4310, 2.9% of collisions were fatal and 33% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal82.9%
  • Serious9233%
  • Slight17564%

Where the B4310 ranks among 4,923 roads

Most collisions
2,819th
Most casualties
2,785th
Most fatal collisions
1,937th
Most serious collisions
2,054th

B4310 accidents by year

Collisions on the B4310 peaked at 16 in 1979 and were down to 10 in 2025.

Collisions and casualties on the B4310, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251013
202411
202311
202233
202144
202045
201956
201844
201724
201657
201511
201433
201311
2012915
201146
201057
200944
200867
200755
200611
200578
20041421
200389
2002715
2001917
200068
199922
199834
199722
199633
199558
1994710
1993814
1992913
199144
199057
198968
1988812
1987910
1986710
198558
19841115
1983710
1982710
1981811
19801422
19791626

When crashes happen on the B4310

Friday has the most collisions on the B4310 (48), and 3pm to 6pm is the busiest time of day (67).

Collisions by day of the week

  • Monday41 (15%)
  • Tuesday41 (15%)
  • Wednesday33 (12%)
  • Thursday32 (12%)
  • Friday48 (17%)
  • Saturday36 (13%)
  • Sunday44 (16%)

Collisions by time of day

  • Midnight to 3am13 (4.7%)
  • 3am to 6am5 (1.8%)
  • 6am to 9am25 (9.1%)
  • 9am to noon37 (13%)
  • Noon to 3pm46 (17%)
  • 3pm to 6pm67 (24%)
  • 6pm to 9pm48 (17%)
  • 9pm to midnight34 (12%)

Collisions by month

  • January23 (8.4%)
  • February23 (8.4%)
  • March18 (6.5%)
  • April22 (8%)
  • May21 (7.6%)
  • June17 (6.2%)
  • July25 (9.1%)
  • August31 (11%)
  • September26 (9.5%)
  • October17 (6.2%)
  • November31 (11%)
  • December21 (7.6%)

Light conditions at the time

  • Daylight191 (69%)
  • Dark, street lights lit41 (15%)
  • Dark, no street lighting36 (13%)
  • Dark, lighting unknown3 (1.1%)
  • Dark, street lights unlit3 (1.1%)
  • Not recorded1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4310 crashes

On the B4310, 51% of collisions happened where the speed limit was 30 mph and 57% on a dry road surface.

Speed limit at the scene

  • 20 mph4 (1.5%)
  • 30 mph140 (51%)
  • 40 mph12 (4.4%)
  • 50 mph2 (0.7%)
  • 60 mph116 (42%)
  • Not recorded1 (0.4%)

Weather at the time

  • Fine, no high winds208 (76%)
  • Raining, no high winds36 (13%)
  • Raining with high winds9 (3.3%)
  • Snowing, no high winds4 (1.5%)
  • Other15 (5.5%)
  • Not recorded3 (1.1%)

Road surface

  • Dry157 (57%)
  • Wet or damp101 (37%)
  • Frost or ice9 (3.3%)
  • Snow5 (1.8%)
  • Flood over 3cm deep2 (0.7%)
  • Not recorded1 (0.4%)

Type of road

  • Single carriageway271 (99%)
  • Dual carriageway1 (0.4%)
  • One way street or slip road1 (0.4%)
  • Roundabout1 (0.4%)
  • Not recorded1 (0.4%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4310 crashes

Car occupants make up 70% of the people killed or injured on the B4310, followed by pedestrians (9.9%).

Casualties by road user

  • Car occupant270 (70%)
  • Pedestrian38 (9.9%)
  • Motorcyclist33 (8.6%)
  • Van occupant14 (3.6%)
  • Cyclist11 (2.9%)
  • Goods vehicle occupant (over 3.5 tonnes)7 (1.8%)
  • Taxi or private hire car occupant7 (1.8%)
  • Other5 (1.3%)

Vehicles involved

  • Car343 (75%)
  • Motorcycle34 (7.4%)
  • Goods vehicle over 3.5 tonnes29 (6.3%)
  • Van or goods vehicle up to 3.5 tonnes27 (5.9%)
  • Pedal cycle11 (2.4%)
  • Bus or coach5 (1.1%)
  • Taxi or private hire car4 (0.9%)
  • Other6 (1.3%)

Casualties by age

  • 0 to 515 (3.9%)
  • 6 to 107 (1.8%)
  • 11 to 1523 (6%)
  • 16 to 20105 (27%)
  • 21 to 2539 (10%)
  • 26 to 3565 (17%)
  • 36 to 4542 (11%)
  • 46 to 5536 (9.4%)
  • 56 to 6526 (6.8%)
  • 66 to 7513 (3.4%)
  • Over 7514 (3.6%)

Drivers, passengers and pedestrians

  • Driver or rider237 (62%)
  • Passenger110 (29%)
  • Pedestrian38 (9.9%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4310

Map of the 25 most recent crashes on the B4310

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4310 crashes by council area

All 275 collisions on the B4310 were in Carmarthenshire.

Collisions on the B4310 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stCarmarthenshire275385892

B4310 crashes by town

Of the 275 collisions on the B4310, 104 were in the built-up area of Tumble.

Recent crashes on the B4310

These are the 25 most recent collisions on the B4310, from 20 November 2019 to 4 December 2025.

Severity