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CrashStats

B4304 accidents: crash map and statistics

Police recorded 388 collisions on the B4304 from 1979 to 2025, with 521 casualties. Of those crashes, 5 were fatal and 88 serious, and 6 people were killed.

In 2025 there were 11 collisions on the B4304, down 31% from 16 in 2024, with 16 casualties.

Collisions since 1979
388
2,347th highest of 4,923 roads
Casualties
521
1.34 per collision
Fatal collisions
5
6 people killed
Serious collisions
88
102 seriously injured
Collisions in 2025
11
Down 31% on 2024
Casualties in 2025
16
Level with 2024

Crash severity on the B4304

On the B4304, 1.3% of collisions were fatal and 23% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal51.3%
  • Serious8823%
  • Slight29576%

Where the B4304 ranks among 4,923 roads

Most collisions
2,347th
Most casualties
2,353rd
Most fatal collisions
2,545th
Most serious collisions
2,122nd

B4304 accidents by year

Collisions on the B4304 peaked at 19 in 2004 and were down to 11 in 2025.

Collisions and casualties on the B4304, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251116
20241616
20231213
20221019
20211319
2020814
20191112
2018917
20171212
2016912
2015912
20141419
20131416
20121012
20111418
201067
20091323
2008713
20071015
2006813
20051422
20041925
200346
2002915
2001912
200089
1999810
199857
1997615
19961216
199544
199478
199346
199222
199155
199066
198922
198888
19871417
198611
19851012
198488
198355
198211
198100
198000
197911

When crashes happen on the B4304

Thursday has the most collisions on the B4304 (63), and 3pm to 6pm is the busiest time of day (101).

Collisions by day of the week

  • Monday44 (11%)
  • Tuesday62 (16%)
  • Wednesday57 (15%)
  • Thursday63 (16%)
  • Friday62 (16%)
  • Saturday54 (14%)
  • Sunday46 (12%)

Collisions by time of day

  • Midnight to 3am7 (1.8%)
  • 3am to 6am7 (1.8%)
  • 6am to 9am17 (4.4%)
  • 9am to noon73 (19%)
  • Noon to 3pm69 (18%)
  • 3pm to 6pm101 (26%)
  • 6pm to 9pm67 (17%)
  • 9pm to midnight47 (12%)

Collisions by month

  • January25 (6.4%)
  • February30 (7.7%)
  • March38 (9.8%)
  • April36 (9.3%)
  • May32 (8.2%)
  • June37 (9.5%)
  • July29 (7.5%)
  • August29 (7.5%)
  • September34 (8.8%)
  • October26 (6.7%)
  • November33 (8.5%)
  • December39 (10%)

Light conditions at the time

  • Daylight275 (71%)
  • Dark, street lights lit108 (28%)
  • Dark, lighting unknown2 (0.5%)
  • Dark, no street lighting2 (0.5%)
  • Dark, street lights unlit1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4304 crashes

On the B4304, 79% of collisions happened where the speed limit was 30 mph and 75% on a dry road surface.

Speed limit at the scene

  • 20 mph10 (2.6%)
  • 30 mph305 (79%)
  • 40 mph64 (16%)
  • 60 mph9 (2.3%)

Weather at the time

  • Fine, no high winds312 (80%)
  • Raining, no high winds52 (13%)
  • Raining with high winds12 (3.1%)
  • Fine with high winds3 (0.8%)
  • Other7 (1.8%)
  • Not recorded2 (0.5%)

Road surface

  • Dry290 (75%)
  • Wet or damp97 (25%)
  • Frost or ice1 (0.3%)

Type of road

  • Single carriageway293 (76%)
  • Roundabout74 (19%)
  • One way street or slip road13 (3.4%)
  • Dual carriageway8 (2.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4304 crashes

Car occupants make up 59% of the people killed or injured on the B4304, followed by pedestrians (16%).

Casualties by road user

  • Car occupant307 (59%)
  • Pedestrian83 (16%)
  • Cyclist60 (12%)
  • Motorcyclist45 (8.6%)
  • Van occupant7 (1.3%)
  • Bus or coach occupant6 (1.2%)
  • Other10 (1.9%)
  • Not recorded3 (0.6%)

Vehicles involved

  • Car546 (75%)
  • Pedal cycle61 (8.4%)
  • Motorcycle45 (6.2%)
  • Van or goods vehicle up to 3.5 tonnes26 (3.6%)
  • Taxi or private hire car18 (2.5%)
  • Goods vehicle over 3.5 tonnes13 (1.8%)
  • Bus or coach8 (1.1%)
  • Other10 (1.4%)

Casualties by age

  • 0 to 510 (1.9%)
  • 6 to 1024 (4.6%)
  • 11 to 1530 (5.8%)
  • 16 to 2096 (18%)
  • 21 to 2564 (12%)
  • 26 to 3596 (18%)
  • 36 to 4561 (12%)
  • 46 to 5551 (9.8%)
  • 56 to 6537 (7.1%)
  • 66 to 7536 (6.9%)
  • Over 7516 (3.1%)

Drivers, passengers and pedestrians

  • Driver or rider315 (60%)
  • Passenger123 (24%)
  • Pedestrian83 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4304

Map of the 25 most recent crashes on the B4304

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4304 crashes by council area

Of the 388 collisions on the B4304, 387 were in Carmarthenshire.

Collisions on the B4304 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stCarmarthenshire387519588

B4304 crashes by town

Of the 388 collisions on the B4304, 308 were in the built-up area of Llanelli.

Recent crashes on the B4304

These are the 25 most recent collisions on the B4304, from 5 March 2024 to 16 December 2025.

Severity