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CrashStats

B4233 accidents: crash map and statistics

Police recorded 182 collisions on the B4233 from 1979 to 2025, with 249 casualties. Of those crashes, 5 were fatal and 37 serious, and 5 people were killed.

In 2025 there were 2 collisions on the B4233, down 33% from 3 in 2024, with 2 casualties.

Collisions since 1979
182
3,363rd highest of 4,923 roads
Casualties
249
1.37 per collision
Fatal collisions
5
5 people killed
Serious collisions
37
43 seriously injured
Collisions in 2025
2
Down 33% on 2024
Casualties in 2025
2
Down 50% on 2024

Crash severity on the B4233

On the B4233, 2.7% of collisions were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal52.7%
  • Serious3720%
  • Slight14077%

Where the B4233 ranks among 4,923 roads

Most collisions
3,363rd
Most casualties
3,352nd
Most fatal collisions
2,545th
Most serious collisions
3,385th

B4233 accidents by year

Collisions on the B4233 peaked at 10 in 1985 and were down to 2 in 2025.

Collisions and casualties on the B4233, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202434
202313
202200
202133
202011
201922
201811
201700
201600
201500
201400
201322
201212
201100
201035
200957
200811
200746
200622
200556
200444
200368
2002610
200134
200014
199935
199833
1997611
199656
199546
1994913
199368
199255
1991911
199055
198978
1988813
1987810
198669
19851014
198433
1983913
198238
198133
198045
19791013

When crashes happen on the B4233

Saturday has the most collisions on the B4233 (35), and 3pm to 6pm is the busiest time of day (47).

Collisions by day of the week

  • Monday23 (13%)
  • Tuesday28 (15%)
  • Wednesday27 (15%)
  • Thursday27 (15%)
  • Friday24 (13%)
  • Saturday35 (19%)
  • Sunday18 (9.9%)

Collisions by time of day

  • Midnight to 3am13 (7.1%)
  • 3am to 6am3 (1.6%)
  • 6am to 9am19 (10%)
  • 9am to noon32 (18%)
  • Noon to 3pm34 (19%)
  • 3pm to 6pm47 (26%)
  • 6pm to 9pm23 (13%)
  • 9pm to midnight11 (6%)

Collisions by month

  • January15 (8.2%)
  • February12 (6.6%)
  • March13 (7.1%)
  • April8 (4.4%)
  • May14 (7.7%)
  • June14 (7.7%)
  • July25 (14%)
  • August13 (7.1%)
  • September14 (7.7%)
  • October26 (14%)
  • November16 (8.8%)
  • December12 (6.6%)

Light conditions at the time

  • Daylight128 (70%)
  • Dark, street lights lit24 (13%)
  • Dark, no street lighting23 (13%)
  • Dark, street lights unlit6 (3.3%)
  • Dark, lighting unknown1 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4233 crashes

On the B4233, 47% of collisions happened where the speed limit was 30 mph and 57% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (1.1%)
  • 30 mph86 (47%)
  • 40 mph10 (5.5%)
  • 50 mph1 (0.5%)
  • 60 mph82 (45%)
  • 70 mph1 (0.5%)

Weather at the time

  • Fine, no high winds125 (69%)
  • Raining, no high winds37 (20%)
  • Raining with high winds4 (2.2%)
  • Fog or mist3 (1.6%)
  • Other12 (6.6%)
  • Not recorded1 (0.5%)

Road surface

  • Dry104 (57%)
  • Wet or damp70 (38%)
  • Frost or ice5 (2.7%)
  • Snow3 (1.6%)

Type of road

  • Single carriageway171 (94%)
  • One way street or slip road4 (2.2%)
  • Roundabout4 (2.2%)
  • Dual carriageway2 (1.1%)
  • Not recorded1 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4233 crashes

Car occupants make up 60% of the people killed or injured on the B4233, followed by motorcyclists (15%).

Casualties by road user

  • Car occupant150 (60%)
  • Motorcyclist38 (15%)
  • Pedestrian32 (13%)
  • Cyclist11 (4.4%)
  • Van occupant6 (2.4%)
  • Other vehicle occupant4 (1.6%)
  • Bus or coach occupant3 (1.2%)
  • Other5 (2%)

Vehicles involved

  • Car202 (68%)
  • Motorcycle39 (13%)
  • Goods vehicle over 3.5 tonnes13 (4.4%)
  • Van or goods vehicle up to 3.5 tonnes13 (4.4%)
  • Pedal cycle11 (3.7%)
  • Agricultural vehicle7 (2.3%)
  • Other vehicle7 (2.3%)
  • Other6 (2%)

Casualties by age

  • 0 to 52 (0.8%)
  • 6 to 106 (2.4%)
  • 11 to 1515 (6%)
  • 16 to 2063 (25%)
  • 21 to 2532 (13%)
  • 26 to 3540 (16%)
  • 36 to 4536 (14%)
  • 46 to 5519 (7.6%)
  • 56 to 6518 (7.2%)
  • 66 to 7512 (4.8%)
  • Over 755 (2%)
  • Not recorded1 (0.4%)

Drivers, passengers and pedestrians

  • Driver or rider152 (61%)
  • Passenger65 (26%)
  • Pedestrian32 (13%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4233

Map of the 25 most recent crashes on the B4233

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

  • 25 crashes
  • Serious
  • Slight

B4233 crashes by council area

Collisions on the B4233 were recorded in 2 council areas. Monmouthshire has the most, with 148, followed by Rhondda Cynon Taf (34).

Collisions on the B4233 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stMonmouthshire148196236
2ndRhondda Cynon Taf345331

B4233 crashes by town

Collisions on the B4233 were recorded in 5 towns and built-up areas, led by Monmouth (33) and Abergavenny (15).

Recent crashes on the B4233

These are the 25 most recent collisions on the B4233, from 14 July 2008 to 30 September 2025.

Severity