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CrashStats

B4320 accidents: crash map and statistics

Police recorded 221 collisions on the B4320 from 1979 to 2025, with 325 casualties. Of those crashes, 2 were fatal and 70 serious, and 2 people were killed.

In 2025 there were 2 collisions on the B4320, level with 2024, with 2 casualties.

Collisions since 1979
221
3,113th highest of 4,923 roads
Casualties
325
1.47 per collision
Fatal collisions
2
2 people killed
Serious collisions
70
92 seriously injured
Collisions in 2025
2
Level with 2024
Casualties in 2025
2
Down 33% on 2024

Crash severity on the B4320

On the B4320, 0.9% of collisions were fatal and 32% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal20.9%
  • Serious7032%
  • Slight14967%

Where the B4320 ranks among 4,923 roads

Most collisions
3,113th
Most casualties
3,011th
Most fatal collisions
3,485th
Most serious collisions
2,482nd

B4320 accidents by year

Collisions on the B4320 peaked at 15 in 1980 and were down to 2 in 2025.

Collisions and casualties on the B4320, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202423
202311
202257
202133
202022
201911
201833
201711
201611
201522
201400
201311
201211
201134
20101323
200933
200811
200711
200647
2005818
200469
200344
200266
2001510
2000912
199959
199822
199758
199622
1995812
199445
19931019
1992811
199169
199022
198946
198857
198757
198656
198579
1984613
198357
19821117
1981916
19801523
197999

When crashes happen on the B4320

Thursday has the most collisions on the B4320 (38), and 3pm to 6pm is the busiest time of day (62).

Collisions by day of the week

  • Monday30 (14%)
  • Tuesday34 (15%)
  • Wednesday30 (14%)
  • Thursday38 (17%)
  • Friday26 (12%)
  • Saturday36 (16%)
  • Sunday27 (12%)

Collisions by time of day

  • Midnight to 3am10 (4.5%)
  • 3am to 6am6 (2.7%)
  • 6am to 9am37 (17%)
  • 9am to noon34 (15%)
  • Noon to 3pm23 (10%)
  • 3pm to 6pm62 (28%)
  • 6pm to 9pm34 (15%)
  • 9pm to midnight15 (6.8%)

Collisions by month

  • January15 (6.8%)
  • February16 (7.2%)
  • March22 (10%)
  • April17 (7.7%)
  • May22 (10%)
  • June14 (6.3%)
  • July21 (9.5%)
  • August31 (14%)
  • September11 (5%)
  • October19 (8.6%)
  • November18 (8.1%)
  • December15 (6.8%)

Light conditions at the time

  • Daylight161 (73%)
  • Dark, no street lighting41 (19%)
  • Dark, street lights lit14 (6.3%)
  • Dark, lighting unknown2 (0.9%)
  • Dark, street lights unlit2 (0.9%)
  • Not recorded1 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4320 crashes

On the B4320, 60% of collisions happened where the speed limit was 60 mph and 51% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (0.9%)
  • 30 mph79 (36%)
  • 40 mph1 (0.5%)
  • 50 mph4 (1.8%)
  • 60 mph133 (60%)
  • 70 mph2 (0.9%)

Weather at the time

  • Fine, no high winds139 (63%)
  • Raining, no high winds45 (20%)
  • Raining with high winds14 (6.3%)
  • Fine with high winds6 (2.7%)
  • Other15 (6.8%)
  • Not recorded2 (0.9%)

Road surface

  • Dry112 (51%)
  • Wet or damp97 (44%)
  • Frost or ice7 (3.2%)
  • Snow2 (0.9%)
  • Other2 (0.9%)
  • Not recorded1 (0.5%)

Type of road

  • Single carriageway217 (98%)
  • Dual carriageway3 (1.4%)
  • Not recorded1 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4320 crashes

Car occupants make up 68% of the people killed or injured on the B4320, followed by motorcyclists (10%).

Casualties by road user

  • Car occupant220 (68%)
  • Motorcyclist34 (10%)
  • Pedestrian23 (7.1%)
  • Cyclist19 (5.8%)
  • Minibus occupant9 (2.8%)
  • Van occupant8 (2.5%)
  • Bus or coach occupant4 (1.2%)
  • Other8 (2.5%)

Vehicles involved

  • Car256 (70%)
  • Motorcycle36 (9.8%)
  • Van or goods vehicle up to 3.5 tonnes19 (5.2%)
  • Pedal cycle18 (4.9%)
  • Goods vehicle over 3.5 tonnes14 (3.8%)
  • Bus or coach11 (3%)
  • Agricultural vehicle5 (1.4%)
  • Other9 (2.4%)

Casualties by age

  • 0 to 59 (2.8%)
  • 6 to 106 (1.8%)
  • 11 to 1517 (5.2%)
  • 16 to 2075 (23%)
  • 21 to 2548 (15%)
  • 26 to 3557 (18%)
  • 36 to 4541 (13%)
  • 46 to 5531 (9.5%)
  • 56 to 6520 (6.2%)
  • 66 to 7514 (4.3%)
  • Over 757 (2.2%)

Drivers, passengers and pedestrians

  • Driver or rider199 (61%)
  • Passenger103 (32%)
  • Pedestrian23 (7.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4320

Map of the 24 most recent crashes on the B4320

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

  • 24 crashes
  • Serious
  • Slight

B4320 crashes by council area

Collisions on the B4320 were recorded in 2 council areas. Pembrokeshire has the most, with 216, followed by Herefordshire (5).

Collisions on the B4320 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stPembrokeshire216314267
2ndHerefordshire51103

B4320 crashes by town

Of the 221 collisions on the B4320, 43 were in the built-up area of Pembroke.

Recent crashes on the B4320

These are the 25 most recent collisions on the B4320, from 7 February 2012 to 1 July 2025.

Severity