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CrashStats

B4285 accidents: crash map and statistics

Police recorded 95 collisions on the B4285 from 1979 to 2024, with 116 casualties. Of those crashes, 1 was fatal and 18 serious, and 1 person was killed.

No collisions were recorded on the B4285 in 2025, after 2 in 2024.

Collisions since 1979
95
4,089th highest of 4,923 roads
Casualties
116
1.22 per collision
Fatal collisions
1
1 person killed
Serious collisions
18
23 seriously injured
Collisions in 2025
0
2 in 2024
Casualties in 2025
0
2 in 2024

Crash severity on the B4285

On the B4285, 1.1% of collisions were fatal and 19% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2024

  • Fatal11.1%
  • Serious1819%
  • Slight7680%

Where the B4285 ranks among 4,923 roads

Most collisions
4,089th
Most casualties
4,178th
Most fatal collisions
3,933rd
Most serious collisions
4,133rd

B4285 accidents by year

Collisions on the B4285 peaked at 14 in 1982; none were recorded in 2025.

Collisions and casualties on the B4285, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202500
202422
202300
202211
202100
202000
201922
201811
201722
201600
201522
201411
201322
201211
201111
201022
200922
200813
2007611
200634
200522
200400
200311
200246
200145
200011
199900
199800
199700
199624
199500
199400
199322
199200
199111
199011
198944
198833
198769
198622
198500
198445
198377
19821414
198126
198033
197933

When crashes happen on the B4285

Monday has the most collisions on the B4285 (19), and 3pm to 6pm is the busiest time of day (21).

Collisions by day of the week

  • Monday19 (20%)
  • Tuesday15 (16%)
  • Wednesday16 (17%)
  • Thursday10 (11%)
  • Friday12 (13%)
  • Saturday10 (11%)
  • Sunday13 (14%)

Collisions by time of day

  • Midnight to 3am6 (6.3%)
  • 3am to 6am0 (0%)
  • 6am to 9am9 (9.5%)
  • 9am to noon17 (18%)
  • Noon to 3pm16 (17%)
  • 3pm to 6pm21 (22%)
  • 6pm to 9pm15 (16%)
  • 9pm to midnight11 (12%)

Collisions by month

  • January10 (11%)
  • February3 (3.2%)
  • March8 (8.4%)
  • April8 (8.4%)
  • May4 (4.2%)
  • June5 (5.3%)
  • July8 (8.4%)
  • August3 (3.2%)
  • September10 (11%)
  • October17 (18%)
  • November11 (12%)
  • December8 (8.4%)

Light conditions at the time

  • Daylight64 (67%)
  • Dark, street lights lit25 (26%)
  • Dark, lighting unknown3 (3.2%)
  • Dark, no street lighting1 (1.1%)
  • Dark, street lights unlit1 (1.1%)
  • Not recorded1 (1.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4285 crashes

On the B4285, 93% of collisions happened where the speed limit was 30 mph and 62% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (3.2%)
  • 30 mph88 (93%)
  • 40 mph4 (4.2%)

Weather at the time

  • Fine, no high winds75 (79%)
  • Raining, no high winds16 (17%)
  • Fine with high winds1 (1.1%)
  • Raining with high winds1 (1.1%)
  • Other1 (1.1%)
  • Not recorded1 (1.1%)

Road surface

  • Dry59 (62%)
  • Wet or damp31 (33%)
  • Frost or ice4 (4.2%)
  • Not recorded1 (1.1%)

Type of road

  • Single carriageway91 (96%)
  • Dual carriageway3 (3.2%)
  • Not recorded1 (1.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4285 crashes

Pedestrians make up 38% of the people killed or injured on the B4285, followed by car occupants (35%).

Casualties by road user

  • Pedestrian44 (38%)
  • Car occupant41 (35%)
  • Bus or coach occupant11 (9.5%)
  • Motorcyclist9 (7.8%)
  • Cyclist7 (6%)
  • Minibus occupant2 (1.7%)
  • Other vehicle occupant1 (0.9%)
  • Taxi or private hire car occupant1 (0.9%)

Vehicles involved

  • Car94 (69%)
  • Bus or coach11 (8.1%)
  • Motorcycle10 (7.4%)
  • Pedal cycle7 (5.1%)
  • Goods vehicle over 3.5 tonnes5 (3.7%)
  • Van or goods vehicle up to 3.5 tonnes5 (3.7%)
  • Other vehicle2 (1.5%)
  • Other2 (1.5%)

Casualties by age

  • 0 to 53 (2.6%)
  • 6 to 1012 (10%)
  • 11 to 1514 (12%)
  • 16 to 2022 (19%)
  • 21 to 2511 (9.5%)
  • 26 to 3516 (14%)
  • 36 to 4515 (13%)
  • 46 to 559 (7.8%)
  • 56 to 656 (5.2%)
  • 66 to 756 (5.2%)
  • Over 752 (1.7%)

Drivers, passengers and pedestrians

  • Driver or rider48 (41%)
  • Pedestrian44 (38%)
  • Passenger24 (21%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4285

Map of the 25 most recent crashes on the B4285

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

  • 25 crashes
  • Serious
  • Slight

B4285 crashes by council area

Of the 95 collisions on the B4285, 92 were in Merthyr Tydfil.

Collisions on the B4285 in each area, 1979 to 2024
RankAreaCollisionsCasualtiesFatalSerious
1stMerthyr Tydfil92113118

B4285 crashes by town

Of the 95 collisions on the B4285, 40 were in the built-up area of Troedyrhiw and Pentrebach.

Recent crashes on the B4285

These are the 25 most recent collisions on the B4285, from 17 May 2007 to 17 November 2024.

Severity