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CrashStats

LL51 road accidents: crash map and statistics

Police recorded 182 road traffic collisions in the LL51 postcode district, Gwynedd, from 1979 to 2025, and 346 people were killed or injured in them. Of those collisions, 6 were fatal and 49 were serious.

In 2025 police recorded 2 collisions, down from 3 in 2024.

Collisions since 1979
182
2,583rd of 2,813 postcode districts, highest first
Casualties
346
1.90 per collision
Fatal collisions
6
7 people killed
Serious collisions
49
82 seriously injured
Collisions in 2025
2
3 in 2024
Casualties in 2025
5
7 in 2024

Road collision statistics for LL51

Collisions by severity, 1979 to 2025

  • Fatal63.3%
  • Serious4927%
  • Slight12770%

What the data shows

  • LL51 had 21 collisions from 2016 to 2025, 38% fewer than the 34 from 2006 to 2015.
  • 30% of collisions in LL51 were fatal or serious, against 20% across Great Britain.
  • 33 children under 16 were killed or injured in LL51, 9.6% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 43% of collisions in LL51.

Where LL51 ranks among 2,813 postcode districts

Most collisions
2,583rd
Most casualties
2,551st
Most fatal collisions
2,516th
Most serious collisions
2,589th

Collisions by day of the week

  • Monday25 (14%)
  • Tuesday13 (7.1%)
  • Wednesday27 (15%)
  • Thursday27 (15%)
  • Friday28 (15%)
  • Saturday29 (16%)
  • Sunday33 (18%)

Light conditions

  • Daylight134 (74%)
  • Dark, no street lighting40 (22%)
  • Dark, street lights lit8 (4.4%)

Type of road

  • Single carriageway179 (98%)
  • Dual carriageway2 (1.1%)
  • Roundabout1 (0.5%)

Speed limit at the scene

  • 30 mph10 (5.5%)
  • 40 mph14 (7.7%)
  • 50 mph1 (0.5%)
  • 60 mph146 (80%)
  • 70 mph11 (6%)

Weather at the time

  • Fine, no high winds127 (70%)
  • Raining, no high winds29 (16%)
  • Raining with high winds5 (2.7%)
  • Fog or mist4 (2.2%)
  • Fine with high winds2 (1.1%)
  • Snowing with high winds1 (0.5%)
  • Snowing, no high winds1 (0.5%)
  • Other11 (6%)
  • Not recorded2 (1.1%)

Who was hurt

  • Car occupant279 (81%)
  • Motorcyclist15 (4.3%)
  • Van occupant13 (3.8%)
  • Bus or coach occupant10 (2.9%)
  • Minibus occupant8 (2.3%)
  • Goods vehicle occupant (over 3.5 tonnes)7 (2%)
  • Pedestrian5 (1.4%)
  • Taxi or private hire car occupant4 (1.2%)
  • Cyclist3 (0.9%)
  • Other vehicle occupant2 (0.6%)

Source: Department for Transport, STATS19 road safety data

LL51 road accidents by year

Collisions and casualties in LL51, 1979 to 2025

Collisions in LL51 peaked at 9 in 2005; 2025 had 2.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202525
202437
202322
202213
202112
202025
201969
201822
201700
201626
201529
201456
201323
201211
201124
201034
200946
2008519
2007610
200647
2005914
200434
2003210
2002815
2001610
200047
1999716
199835
199746
199645
199569
199457
1993714
199226
199145
199045
198936
198824
198746
1986816
1985614
1984511
198339
198239
198145
198056
1979612

Map of recent crashes in LL51

Map of the 24 most recent crashes in LL51

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in LL51

The 24 most recent collisions in LL51 happened between 22 December 2014 and 25 August 2025.

Severity

Crashes by road in LL51

The A487 has the most collisions in LL51, 143 of 182 (79%), followed by the B4411 (7).

Collisions in LL51 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA487143287642
2ndB441171403

Council area for LL51

LL51 is in Gwynedd, where police recorded 16,819 collisions from 1979 to 2025. LL51 accounts for 1.1% of them.