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CrashStats

Trelewis road accidents: crash map and statistics

Police recorded 122 road traffic collisions in Trelewis, Merthyr Tydfil, from 1979 to 2025, and 146 people were killed or injured in them. Of those collisions, 1 was fatal and 7 were serious.

In 2025 police recorded 2 collisions, up from 1 in 2024.

Collisions since 1979
122
2,564th of 2,851 towns, highest first
Casualties
146
1.20 per collision
Fatal collisions
1
1 person killed
Serious collisions
7
9 seriously injured
Collisions in 2025
2
1 in 2024
Casualties in 2025
2
1 in 2024

Road collision statistics for Trelewis

Collisions by severity, 1979 to 2025

  • Fatal10.8%
  • Serious75.7%
  • Slight11493%

What the data shows

  • Trelewis had 12 collisions from 2016 to 2025, 33% fewer than the 18 from 2006 to 2015.
  • 6.6% of collisions in Trelewis were fatal or serious, against 20% across Great Britain.
  • The busiest three hours of the day in Trelewis are between noon and 3pm, with 22% of collisions.
  • 37 children under 16 were killed or injured in Trelewis, 25% of the casualties whose age was recorded.

Where Trelewis ranks among 2,851 towns

Most collisions
2,564th
Most casualties
2,693rd
Most fatal collisions
2,420th
Most serious collisions
2,851st

Collisions by day of the week

  • Monday18 (15%)
  • Tuesday17 (14%)
  • Wednesday9 (7.4%)
  • Thursday18 (15%)
  • Friday17 (14%)
  • Saturday23 (19%)
  • Sunday20 (16%)

Light conditions

  • Daylight87 (71%)
  • Dark, street lights lit29 (24%)
  • Dark, street lights unlit5 (4.1%)
  • Dark, lighting unknown1 (0.8%)

Type of road

  • Single carriageway116 (95%)
  • Not recorded6 (4.9%)

Speed limit at the scene

  • 20 mph3 (2.5%)
  • 30 mph108 (89%)
  • 60 mph11 (9%)

Weather at the time

  • Fine, no high winds92 (75%)
  • Raining, no high winds18 (15%)
  • Raining with high winds4 (3.3%)
  • Snowing, no high winds2 (1.6%)
  • Fine with high winds1 (0.8%)
  • Fog or mist1 (0.8%)
  • Snowing with high winds1 (0.8%)
  • Other1 (0.8%)
  • Not recorded2 (1.6%)

Who was hurt

  • Car occupant72 (49%)
  • Pedestrian37 (25%)
  • Motorcyclist12 (8.2%)
  • Bus or coach occupant11 (7.5%)
  • Cyclist9 (6.2%)
  • Other vehicle occupant3 (2.1%)
  • Van occupant2 (1.4%)

Source: Department for Transport, STATS19 road safety data

Trelewis road accidents by year

Collisions and casualties in Trelewis, 1979 to 2025

Collisions in Trelewis peaked at 10 in 1995; 2025 had 2.

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202411
202311
202234
202122
202000
201911
201812
201700
201612
201511
201422
201311
201212
201133
201045
200900
200811
200722
200636
200522
200426
200355
200246
200111
200047
199933
199855
199722
199622
19951012
199477
199344
199222
199133
199023
198911
198822
198722
198611
198533
198433
198345
198278
198146
198044
197933

Map of recent crashes in Trelewis

Map of the 24 most recent crashes in Trelewis

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in Trelewis

The 24 most recent collisions in Trelewis happened between 14 May 2010 and 9 October 2025.

Severity

Crashes by road in Trelewis

The B4255 has the most collisions in Trelewis, 37 of 122 (30%), followed by the B4254 (29).

Collisions in Trelewis on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stB4255374300
2ndB4254293902

Council area for Trelewis

Trelewis is in Merthyr Tydfil, where police recorded 6,783 collisions from 1979 to 2025. Trelewis accounts for 1.8% of them.

Postcode district for Trelewis

All 122 collisions in Trelewis were in the CF46 postcode district.