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CrashStats

Merthyr Tydfil road accidents: crash map and statistics

Police recorded 3,324 road traffic collisions in Merthyr Tydfil from 1979 to 2025, and 4,487 people were killed or injured in them. Of those collisions, 44 were fatal and 420 were serious.

In 2025 police recorded 19 collisions, up from 17 in 2024.

Collisions since 1979
3,324
306th highest of 2,851 towns
Casualties
4,487
1.35 per collision
Fatal collisions
44
44 people killed
Serious collisions
420
482 seriously injured
Collisions in 2025
19
17 in 2024
Casualties in 2025
24
Down 8% on 2024

Road collision statistics for Merthyr Tydfil

Collisions by severity, 1979 to 2025

  • Fatal441.3%
  • Serious42013%
  • Slight2,86086%

What the data shows

  • Merthyr Tydfil had 270 collisions from 2016 to 2025, 48% fewer than the 521 from 2006 to 2015.
  • 14% of collisions in Merthyr Tydfil were fatal or serious, against 20% across Great Britain.
  • 863 children under 16 were killed or injured in Merthyr Tydfil, 19% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 35% of collisions in Merthyr Tydfil.

Where Merthyr Tydfil ranks among 2,851 towns

Most collisions
306th
Most casualties
289th
Most fatal collisions
250th
Most serious collisions
392nd

Collisions by day of the week

  • Monday444 (13%)
  • Tuesday441 (13%)
  • Wednesday455 (14%)
  • Thursday453 (14%)
  • Friday600 (18%)
  • Saturday551 (17%)
  • Sunday380 (11%)

Light conditions

  • Daylight2,281 (69%)
  • Dark, street lights lit777 (23%)
  • Dark, no street lighting116 (3.5%)
  • Dark, street lights unlit78 (2.3%)
  • Dark, lighting unknown53 (1.6%)
  • Not recorded19 (0.6%)

Type of road

  • Single carriageway2,826 (85%)
  • Roundabout169 (5.1%)
  • Dual carriageway124 (3.7%)
  • One way street or slip road90 (2.7%)
  • Not recorded115 (3.5%)

Speed limit at the scene

  • 10 mph6 (0.2%)
  • 15 mph1 (under 0.1%)
  • 20 mph48 (1.4%)
  • 30 mph3,017 (91%)
  • 40 mph46 (1.4%)
  • 50 mph9 (0.3%)
  • 60 mph166 (5%)
  • 70 mph31 (0.9%)

Weather at the time

  • Fine, no high winds2,516 (76%)
  • Raining, no high winds512 (15%)
  • Raining with high winds80 (2.4%)
  • Fine with high winds51 (1.5%)
  • Snowing, no high winds29 (0.9%)
  • Fog or mist16 (0.5%)
  • Snowing with high winds9 (0.3%)
  • Other45 (1.4%)
  • Not recorded66 (2%)

Who was hurt

  • Car occupant2,415 (54%)
  • Pedestrian1,161 (26%)
  • Motorcyclist264 (5.9%)
  • Bus or coach occupant252 (5.6%)
  • Cyclist208 (4.6%)
  • Van occupant57 (1.3%)
  • Minibus occupant45 (1%)
  • Taxi or private hire car occupant35 (0.8%)
  • Other vehicle occupant32 (0.7%)
  • Goods vehicle occupant (over 3.5 tonnes)17 (0.4%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Merthyr Tydfil road accidents by year

Collisions and casualties in Merthyr Tydfil, 1979 to 2025

Collisions in Merthyr Tydfil peaked at 123 in 1996; 2025 had 19.

  • Collisions
  • Collisions in 2025: 19
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251924
20241726
20232127
20221316
20211725
20201821
20193563
20184052
20174464
20164663
20153955
20144863
20133855
20123654
20115782
20105275
20095069
20086799
200769106
20066587
200578114
200478116
2003106171
200294136
200196131
200067102
199989105
199884130
199788131
1996123162
199592114
1994115162
19936891
1992103147
199184123
199098124
1989121141
1988111132
19878394
19867896
19858199
19847486
198386105
1982114130
198193125
1980120151
1979109143

Map of recent crashes in Merthyr Tydfil

Map of the 24 most recent crashes in Merthyr Tydfil

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in Merthyr Tydfil

The 24 most recent collisions in Merthyr Tydfil happened between 25 September 2024 and 4 December 2025.

Severity

Crashes by road in Merthyr Tydfil

The A4102 has the most collisions in Merthyr Tydfil, 381 of 3,324 (11%), followed by the A470 (314).

Collisions in Merthyr Tydfil on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA4102381515445
2ndA470314424360
3rdA4651402541223
4thA4054106155312
5thA4060304304

Council areas covering Merthyr Tydfil

Collisions in Merthyr Tydfil were recorded in 2 council areas. Merthyr Tydfil has 3,318 of 3,324 (99.8%).

Collisions in Merthyr Tydfil by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stMerthyr Tydfil3,3184,48044419
2ndRhondda Cynon Taf6701

Postcode districts in Merthyr Tydfil

Collisions in Merthyr Tydfil were recorded in 2 postcode districts, led by CF47 (1,982) and CF48 (1,342).