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CrashStats

B4270 accidents: crash map and statistics

Police recorded 246 collisions on the B4270 from 1979 to 2025, with 383 casualties. Of those crashes, 6 were fatal and 49 serious, and 6 people were killed.

In 2025 there were 4 collisions on the B4270, up from none in 2024, with 5 casualties.

Collisions since 1979
246
2,971st highest of 4,923 roads
Casualties
383
1.56 per collision
Fatal collisions
6
6 people killed
Serious collisions
49
81 seriously injured
Collisions in 2025
4
Up from none in 2024
Casualties in 2025
5
Up from none in 2024

Crash severity on the B4270

On the B4270, 2.4% of collisions were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal62.4%
  • Serious4920%
  • Slight19178%

Where the B4270 ranks among 4,923 roads

Most collisions
2,971st
Most casualties
2,791st
Most fatal collisions
2,299th
Most serious collisions
2,995th

B4270 accidents by year

Collisions on the B4270 peaked at 15 in 1981 and were down to 4 in 2025.

Collisions and casualties on the B4270, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202545
202400
202315
202200
202122
202011
201911
201834
201748
2016711
201567
201456
201323
201235
201124
201000
200911
200845
2007610
20061014
200547
200445
2003918
2002811
20011016
200058
1999712
1998815
199769
199647
1995711
199435
1993513
199269
199133
199066
198969
1988917
198744
1986811
1985516
19841014
198366
19821423
19811522
198078
197956

When crashes happen on the B4270

Friday has the most collisions on the B4270 (40), and 3pm to 6pm is the busiest time of day (57).

Collisions by day of the week

  • Monday31 (13%)
  • Tuesday37 (15%)
  • Wednesday31 (13%)
  • Thursday39 (16%)
  • Friday40 (16%)
  • Saturday29 (12%)
  • Sunday39 (16%)

Collisions by time of day

  • Midnight to 3am12 (4.9%)
  • 3am to 6am4 (1.6%)
  • 6am to 9am29 (12%)
  • 9am to noon43 (17%)
  • Noon to 3pm49 (20%)
  • 3pm to 6pm57 (23%)
  • 6pm to 9pm29 (12%)
  • 9pm to midnight23 (9.3%)

Collisions by month

  • January17 (6.9%)
  • February16 (6.5%)
  • March20 (8.1%)
  • April18 (7.3%)
  • May21 (8.5%)
  • June19 (7.7%)
  • July27 (11%)
  • August25 (10%)
  • September25 (10%)
  • October18 (7.3%)
  • November21 (8.5%)
  • December19 (7.7%)

Light conditions at the time

  • Daylight180 (73%)
  • Dark, no street lighting49 (20%)
  • Dark, street lights lit13 (5.3%)
  • Dark, lighting unknown3 (1.2%)
  • Dark, street lights unlit1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4270 crashes

On the B4270, 77% of collisions happened where the speed limit was 60 mph and 48% on a dry road surface.

Speed limit at the scene

  • 30 mph44 (18%)
  • 40 mph6 (2.4%)
  • 50 mph7 (2.8%)
  • 60 mph189 (77%)

Weather at the time

  • Fine, no high winds161 (65%)
  • Raining, no high winds61 (25%)
  • Fine with high winds6 (2.4%)
  • Raining with high winds6 (2.4%)
  • Other9 (3.7%)
  • Not recorded3 (1.2%)

Road surface

  • Dry119 (48%)
  • Wet or damp119 (48%)
  • Frost or ice6 (2.4%)
  • Flood over 3cm deep1 (0.4%)
  • Oil or diesel1 (0.4%)

Type of road

  • Single carriageway234 (95%)
  • Dual carriageway4 (1.6%)
  • Roundabout3 (1.2%)
  • One way street or slip road1 (0.4%)
  • Not recorded4 (1.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4270 crashes

Car occupants make up 77% of the people killed or injured on the B4270, followed by motorcyclists (12%).

Casualties by road user

  • Car occupant296 (77%)
  • Motorcyclist46 (12%)
  • Pedestrian16 (4.2%)
  • Van occupant9 (2.3%)
  • Cyclist6 (1.6%)
  • Goods vehicle occupant (over 3.5 tonnes)6 (1.6%)
  • Minibus occupant2 (0.5%)
  • Other2 (0.5%)

Vehicles involved

  • Car344 (76%)
  • Motorcycle46 (10%)
  • Goods vehicle over 3.5 tonnes20 (4.4%)
  • Van or goods vehicle up to 3.5 tonnes20 (4.4%)
  • Pedal cycle7 (1.6%)
  • Bus or coach5 (1.1%)
  • Agricultural vehicle3 (0.7%)
  • Other5 (1.1%)

Casualties by age

  • 0 to 52 (0.5%)
  • 6 to 102 (0.5%)
  • 11 to 1519 (5%)
  • 16 to 2097 (25%)
  • 21 to 2554 (14%)
  • 26 to 3575 (20%)
  • 36 to 4555 (14%)
  • 46 to 5534 (8.9%)
  • 56 to 6526 (6.8%)
  • 66 to 7510 (2.6%)
  • Over 759 (2.3%)

Drivers, passengers and pedestrians

  • Driver or rider239 (62%)
  • Passenger128 (33%)
  • Pedestrian16 (4.2%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4270

Map of the 25 most recent crashes on the B4270

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4270 crashes by council area

Collisions on the B4270 were recorded in 2 council areas. Vale of Glamorgan has the most, with 236, followed by Rhondda Cynon Taf (10).

Collisions on the B4270 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stVale of Glamorgan236370647
2ndRhondda Cynon Taf101302

B4270 crashes by town

Collisions on the B4270 were recorded in 3 towns and built-up areas, led by Cowbridge (18) and Beddau (7).

Recent crashes on the B4270

These are the 25 most recent collisions on the B4270, from 24 July 2015 to 18 September 2025.

Severity