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CrashStats

LL40 road accidents: crash map and statistics

Police recorded 1,146 road traffic collisions in the LL40 postcode district, Gwynedd, from 1979 to 2025, and 1,908 people were killed or injured in them. Of those collisions, 42 were fatal and 260 were serious.

In 2025 police recorded 5 collisions, up from 4 in 2024.

Collisions since 1979
1,146
2,143rd of 2,813 postcode districts, highest first
Casualties
1,908
1.66 per collision
Fatal collisions
42
46 people killed
Serious collisions
260
357 seriously injured
Collisions in 2025
5
4 in 2024
Casualties in 2025
11
6 in 2024

Road collision statistics for LL40

Collisions by severity, 1979 to 2025

  • Fatal423.7%
  • Serious26023%
  • Slight84474%

What the data shows

  • LL40 had 92 collisions from 2016 to 2025, 61% fewer than the 238 from 2006 to 2015.
  • 26% of collisions in LL40 were fatal or serious, against 20% across Great Britain.
  • The busiest three hours of the day in LL40 are between noon and 3pm, with 25% of collisions.
  • 200 children under 16 were killed or injured in LL40, 10% of the casualties whose age was recorded.

Where LL40 ranks among 2,813 postcode districts

Most collisions
2,143rd
Most casualties
2,031st
Most fatal collisions
1,433rd
Most serious collisions
2,110th

Collisions by day of the week

  • Monday144 (13%)
  • Tuesday119 (10%)
  • Wednesday135 (12%)
  • Thursday167 (15%)
  • Friday225 (20%)
  • Saturday184 (16%)
  • Sunday172 (15%)

Light conditions

  • Daylight919 (80%)
  • Dark, no street lighting186 (16%)
  • Dark, street lights lit34 (3%)
  • Dark, lighting unknown5 (0.4%)
  • Dark, street lights unlit2 (0.2%)

Type of road

  • Single carriageway1,019 (89%)
  • Dual carriageway68 (5.9%)
  • One way street or slip road51 (4.5%)
  • Roundabout6 (0.5%)
  • Not recorded2 (0.2%)

Speed limit at the scene

  • 20 mph1 (0.1%)
  • 30 mph179 (16%)
  • 40 mph48 (4.2%)
  • 50 mph15 (1.3%)
  • 60 mph839 (73%)
  • 70 mph64 (5.6%)

Weather at the time

  • Fine, no high winds768 (67%)
  • Raining, no high winds235 (21%)
  • Raining with high winds35 (3.1%)
  • Fine with high winds18 (1.6%)
  • Snowing, no high winds7 (0.6%)
  • Snowing with high winds4 (0.3%)
  • Fog or mist2 (0.2%)
  • Other64 (5.6%)
  • Not recorded13 (1.1%)

Who was hurt

  • Car occupant1,386 (73%)
  • Motorcyclist210 (11%)
  • Pedestrian124 (6.5%)
  • Van occupant55 (2.9%)
  • Minibus occupant49 (2.6%)
  • Cyclist28 (1.5%)
  • Goods vehicle occupant (over 3.5 tonnes)28 (1.5%)
  • Bus or coach occupant14 (0.7%)
  • Other vehicle occupant8 (0.4%)
  • Taxi or private hire car occupant4 (0.2%)
  • Other2 (0.1%)

Source: Department for Transport, STATS19 road safety data

LL40 road accidents by year

Collisions and casualties in LL40, 1979 to 2025

Collisions in LL40 peaked at 41 in 1979; 2025 had 5.

  • Collisions
  • Collisions in 2025: 5
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025511
202446
2023811
20221115
2021620
2020611
20191219
20181523
20171320
20161216
20152026
20142438
20132228
20122132
20112033
20101528
20092739
20082648
20073157
20063253
20052330
20044072
20033043
20023345
20013363
20002542
19992242
19983766
19973861
19962649
19953158
19943569
19932353
19923561
19913761
19902131
19893854
19883160
19873061
19862760
19852034
19843750
19832630
19822850
19812437
19802537
19794155

Map of recent crashes in LL40

Map of the 24 most recent crashes in LL40

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 LL40

The 24 most recent collisions in LL40 happened between 12 July 2022 and 19 October 2025.

Severity

Crashes by road in LL40

The A470 has the most collisions in LL40, 494 of 1,146 (43%), followed by the A494 (186).

Collisions in LL40 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA47049487821116
2ndA4941863331150
3rdA496128219420
4thA48762100320
5thA4935388211

Council area for LL40

LL40 is in Gwynedd, where police recorded 16,819 collisions from 1979 to 2025. LL40 accounts for 6.8% of them.

Town in LL40

Of the 1,146 collisions in LL40, 142 (12%) were in Dolgellau.