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CrashStats

A4233 accidents: crash map and statistics

Police recorded 876 collisions on the A4233 from 1988 to 2025, with 1,277 casualties. Of those crashes, 16 were fatal and 110 serious, and 17 people were killed.

In 2025 there were 11 collisions on the A4233, up 22% from 9 in 2024, with 17 casualties.

Collisions since 1988
876
1,224th highest of 4,923 roads
Casualties
1,277
1.46 per collision
Fatal collisions
16
17 people killed
Serious collisions
110
137 seriously injured
Collisions in 2025
11
Up 22% on 2024
Casualties in 2025
17
Up 70% on 2024

Crash severity on the A4233

On the A4233, 1.8% of collisions were fatal and 13% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1988 to 2025

  • Fatal161.8%
  • Serious11013%
  • Slight75086%

Where the A4233 ranks among 4,923 roads

Most collisions
1,224th
Most casualties
1,165th
Most fatal collisions
1,181st
Most serious collisions
1,755th

A4233 accidents by year

Collisions on the A4233 peaked at 66 in 1990 and were down to 11 in 2025.

Collisions and casualties on the A4233, 1988 to 2025

  • Collisions
  • Collisions in 2025: 11
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251117
2024910
202377
20221014
202188
2020915
20191833
2018911
20172031
20162033
20151218
20141838
20132233
20122339
20111829
20101831
20091620
20082337
20071825
20063446
20053758
20043769
20034159
20022845
20012540
20001522
19991720
19982439
19972433
19962531
19952632
19944354
19932128
19922832
19913341
19906690
19894971
19881418

When crashes happen on the A4233

Friday has the most collisions on the A4233 (145), and 3pm to 6pm is the busiest time of day (197).

Collisions by day of the week

  • Monday128 (15%)
  • Tuesday126 (14%)
  • Wednesday125 (14%)
  • Thursday132 (15%)
  • Friday145 (17%)
  • Saturday124 (14%)
  • Sunday96 (11%)

Collisions by time of day

  • Midnight to 3am41 (4.7%)
  • 3am to 6am16 (1.8%)
  • 6am to 9am91 (10%)
  • 9am to noon112 (13%)
  • Noon to 3pm180 (21%)
  • 3pm to 6pm197 (22%)
  • 6pm to 9pm146 (17%)
  • 9pm to midnight93 (11%)

Collisions by month

  • January65 (7.4%)
  • February56 (6.4%)
  • March72 (8.2%)
  • April75 (8.6%)
  • May82 (9.4%)
  • June69 (7.9%)
  • July79 (9%)
  • August74 (8.4%)
  • September83 (9.5%)
  • October76 (8.7%)
  • November78 (8.9%)
  • December67 (7.6%)

Light conditions at the time

  • Daylight618 (71%)
  • Dark, street lights lit194 (22%)
  • Dark, no street lighting36 (4.1%)
  • Dark, street lights unlit15 (1.7%)
  • Dark, lighting unknown9 (1%)
  • Not recorded4 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4233 crashes

On the A4233, 83% of collisions happened where the speed limit was 30 mph and 66% on a dry road surface.

Speed limit at the scene

  • 20 mph16 (1.8%)
  • 30 mph723 (83%)
  • 40 mph35 (4%)
  • 50 mph2 (0.2%)
  • 60 mph99 (11%)
  • 70 mph1 (0.1%)

Weather at the time

  • Fine, no high winds675 (77%)
  • Raining, no high winds141 (16%)
  • Raining with high winds24 (2.7%)
  • Fine with high winds5 (0.6%)
  • Other20 (2.3%)
  • Not recorded11 (1.3%)

Road surface

  • Dry581 (66%)
  • Wet or damp267 (30%)
  • Frost or ice16 (1.8%)
  • Snow6 (0.7%)
  • Flood over 3cm deep2 (0.2%)
  • Not recorded4 (0.5%)

Type of road

  • Single carriageway796 (91%)
  • One way street or slip road30 (3.4%)
  • Roundabout25 (2.9%)
  • Dual carriageway24 (2.7%)
  • Not recorded1 (0.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4233 crashes

Car occupants make up 63% of the people killed or injured on the A4233, followed by pedestrians (22%).

Casualties by road user

  • Car occupant806 (63%)
  • Pedestrian286 (22%)
  • Bus or coach occupant69 (5.4%)
  • Motorcyclist54 (4.2%)
  • Cyclist22 (1.7%)
  • Van occupant19 (1.5%)
  • Minibus occupant8 (0.6%)
  • Other13 (1%)

Vehicles involved

  • Car1,243 (82%)
  • Bus or coach75 (5%)
  • Van or goods vehicle up to 3.5 tonnes61 (4%)
  • Motorcycle57 (3.8%)
  • Goods vehicle over 3.5 tonnes27 (1.8%)
  • Pedal cycle22 (1.5%)
  • Minibus10 (0.7%)
  • Other17 (1.1%)

Casualties by age

  • 0 to 544 (3.4%)
  • 6 to 1084 (6.6%)
  • 11 to 1576 (6%)
  • 16 to 20203 (16%)
  • 21 to 25175 (14%)
  • 26 to 35212 (17%)
  • 36 to 45152 (12%)
  • 46 to 55118 (9.2%)
  • 56 to 65103 (8.1%)
  • 66 to 7577 (6%)
  • Over 7532 (2.5%)
  • Not recorded1 (0.1%)

Drivers, passengers and pedestrians

  • Driver or rider578 (45%)
  • Passenger413 (32%)
  • Pedestrian286 (22%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4233

Map of the 25 most recent crashes on the A4233

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4233 crashes by council area

Of the 876 collisions on the A4233, 874 were in Rhondda Cynon Taf.

Collisions on the A4233 in each area, 1988 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stRhondda Cynon Taf8741,27416109

A4233 crashes by town

Collisions on the A4233 were recorded in 6 towns and built-up areas, led by Porth (248) and Ferndale (162).

Recent crashes on the A4233

These are the 25 most recent collisions on the A4233, from 13 May 2023 to 11 December 2025.

Severity