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CrashStats

B4256 accidents: crash map and statistics

Police recorded 165 collisions on the B4256 from 1979 to 2025, with 235 casualties. Of those crashes, none were fatal and 33 were serious.

In 2025 there were 4 collisions on the B4256, up 100% from 2 in 2024, with 5 casualties.

Collisions since 1979
165
3,485th highest of 4,923 roads
Casualties
235
1.42 per collision
Fatal collisions
0
No one killed
Serious collisions
33
47 seriously injured
Collisions in 2025
4
Up 100% on 2024
Casualties in 2025
5
Up 67% on 2024

Crash severity on the B4256

None of the 165 collisions on the B4256 were fatal, and 20% were serious (18% across Great Britain).

Collisions by severity, 1979 to 2025

  • Fatal00%
  • Serious3320%
  • Slight13280%

Where the B4256 ranks among 4,923 roads

Most collisions
3,485th
Most casualties
3,426th
Most fatal collisions
4,444th
Most serious collisions
3,510th

B4256 accidents by year

Collisions on the B4256 peaked at 11 in 2008 and were down to 4 in 2025.

Collisions and casualties on the B4256, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202545
202423
202322
202222
202111
202023
201922
201811
201711
201646
201500
201433
201300
201233
201137
201026
200924
20081116
200767
200667
2005815
200455
20031014
2002410
2001410
200079
199957
199833
199759
199633
1995811
199400
199311
199222
199133
199011
198957
198800
198778
198655
198511
198468
198355
198200
1981817
198011
197911

When crashes happen on the B4256

Friday has the most collisions on the B4256 (32), and 6pm to 9pm is the busiest time of day (34).

Collisions by day of the week

  • Monday22 (13%)
  • Tuesday17 (10%)
  • Wednesday18 (11%)
  • Thursday22 (13%)
  • Friday32 (19%)
  • Saturday29 (18%)
  • Sunday25 (15%)

Collisions by time of day

  • Midnight to 3am18 (11%)
  • 3am to 6am2 (1.2%)
  • 6am to 9am4 (2.4%)
  • 9am to noon17 (10%)
  • Noon to 3pm33 (20%)
  • 3pm to 6pm30 (18%)
  • 6pm to 9pm34 (21%)
  • 9pm to midnight27 (16%)

Collisions by month

  • January16 (9.7%)
  • February12 (7.3%)
  • March14 (8.5%)
  • April15 (9.1%)
  • May10 (6.1%)
  • June17 (10%)
  • July11 (6.7%)
  • August10 (6.1%)
  • September18 (11%)
  • October20 (12%)
  • November12 (7.3%)
  • December10 (6.1%)

Light conditions at the time

  • Daylight94 (57%)
  • Dark, street lights lit42 (25%)
  • Dark, no street lighting25 (15%)
  • Dark, lighting unknown2 (1.2%)
  • Dark, street lights unlit2 (1.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4256 crashes

On the B4256, 74% of collisions happened where the speed limit was 30 mph and 61% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (1.8%)
  • 30 mph122 (74%)
  • 40 mph5 (3%)
  • 50 mph1 (0.6%)
  • 60 mph34 (21%)

Weather at the time

  • Fine, no high winds109 (66%)
  • Raining, no high winds30 (18%)
  • Raining with high winds6 (3.6%)
  • Fine with high winds4 (2.4%)
  • Other15 (9.1%)
  • Not recorded1 (0.6%)

Road surface

  • Dry101 (61%)
  • Wet or damp57 (35%)
  • Snow4 (2.4%)
  • Frost or ice3 (1.8%)

Type of road

  • Single carriageway152 (92%)
  • Roundabout11 (6.7%)
  • One way street or slip road1 (0.6%)
  • Not recorded1 (0.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4256 crashes

Car occupants make up 62% of the people killed or injured on the B4256, followed by pedestrians (22%).

Casualties by road user

  • Car occupant146 (62%)
  • Pedestrian52 (22%)
  • Cyclist11 (4.7%)
  • Motorcyclist10 (4.3%)
  • Taxi or private hire car occupant4 (1.7%)
  • Bus or coach occupant3 (1.3%)
  • Other vehicle occupant3 (1.3%)
  • Other6 (2.6%)

Vehicles involved

  • Car192 (78%)
  • Motorcycle11 (4.5%)
  • Pedal cycle11 (4.5%)
  • Van or goods vehicle up to 3.5 tonnes8 (3.3%)
  • Other vehicle6 (2.4%)
  • Bus or coach5 (2%)
  • Goods vehicle over 3.5 tonnes5 (2%)
  • Other8 (3.3%)

Casualties by age

  • 0 to 53 (1.3%)
  • 6 to 1013 (5.5%)
  • 11 to 1516 (6.8%)
  • 16 to 2055 (23%)
  • 21 to 2526 (11%)
  • 26 to 3554 (23%)
  • 36 to 4526 (11%)
  • 46 to 5514 (6%)
  • 56 to 6513 (5.5%)
  • 66 to 7512 (5.1%)
  • Over 753 (1.3%)

Drivers, passengers and pedestrians

  • Driver or rider103 (44%)
  • Passenger80 (34%)
  • Pedestrian52 (22%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4256

Map of the 25 most recent crashes on the B4256

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

  • 25 crashes
  • Serious
  • Slight

B4256 crashes by council area

Collisions on the B4256 were recorded in 3 council areas. Blaenau Gwent has the most, with 111, followed by Caerphilly (47) and South Oxfordshire (5).

Collisions on the B4256 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBlaenau Gwent111155026
2ndCaerphilly477007
3rdSouth Oxfordshire5800

B4256 crashes by town

Collisions on the B4256 were recorded in 2 towns and built-up areas, led by Tredegar (82) and Rhymney (28).

Recent crashes on the B4256

These are the 25 most recent collisions on the B4256, from 21 October 2012 to 24 October 2025.

Severity