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CrashStats

A4085 accidents: crash map and statistics

Police recorded 235 collisions on the A4085 from 1979 to 2024, with 322 casualties. Of those crashes, 8 were fatal and 63 serious, and 11 people were killed.

No collisions were recorded on the A4085 in 2025, after 2 in 2024.

Collisions since 1979
235
3,033rd highest of 4,923 roads
Casualties
322
1.37 per collision
Fatal collisions
8
11 people killed
Serious collisions
63
78 seriously injured
Collisions in 2025
0
2 in 2024
Casualties in 2025
0
4 in 2024

Crash severity on the A4085

On the A4085, 3.4% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2024

  • Fatal83.4%
  • Serious6327%
  • Slight16470%

Where the A4085 ranks among 4,923 roads

Most collisions
3,033rd
Most casualties
3,029th
Most fatal collisions
1,937th
Most serious collisions
2,629th

A4085 accidents by year

Collisions on the A4085 peaked at 14 in 1988; none were recorded in 2025.

Collisions and casualties on the A4085, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202500
202424
2023610
202211
202100
202000
201933
201836
201711
201655
201535
201435
201333
201267
201179
201056
200936
200811
200756
200666
200555
200445
2003610
200255
200178
2000510
1999610
19981218
199746
199644
199549
199467
199300
199258
199147
199057
198956
19881416
1987914
198688
1985712
1984810
1983710
1982912
198179
19801116
197956

When crashes happen on the A4085

Saturday has the most collisions on the A4085 (48), and 3pm to 6pm is the busiest time of day (63).

Collisions by day of the week

  • Monday28 (12%)
  • Tuesday36 (15%)
  • Wednesday36 (15%)
  • Thursday23 (9.8%)
  • Friday40 (17%)
  • Saturday48 (20%)
  • Sunday24 (10%)

Collisions by time of day

  • Midnight to 3am7 (3%)
  • 3am to 6am3 (1.3%)
  • 6am to 9am9 (3.8%)
  • 9am to noon41 (17%)
  • Noon to 3pm47 (20%)
  • 3pm to 6pm63 (27%)
  • 6pm to 9pm32 (14%)
  • 9pm to midnight33 (14%)

Collisions by month

  • January13 (5.5%)
  • February19 (8.1%)
  • March16 (6.8%)
  • April12 (5.1%)
  • May17 (7.2%)
  • June23 (9.8%)
  • July26 (11%)
  • August38 (16%)
  • September21 (8.9%)
  • October23 (9.8%)
  • November18 (7.7%)
  • December9 (3.8%)

Light conditions at the time

  • Daylight179 (76%)
  • Dark, no street lighting32 (14%)
  • Dark, street lights lit21 (8.9%)
  • Dark, lighting unknown2 (0.9%)
  • Dark, street lights unlit1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4085 crashes

On the A4085, 54% of collisions happened where the speed limit was 60 mph and 63% on a dry road surface.

Speed limit at the scene

  • 30 mph99 (42%)
  • 50 mph2 (0.9%)
  • 60 mph127 (54%)
  • 70 mph7 (3%)

Weather at the time

  • Fine, no high winds181 (77%)
  • Raining, no high winds36 (15%)
  • Raining with high winds5 (2.1%)
  • Snowing, no high winds2 (0.9%)
  • Other10 (4.3%)
  • Not recorded1 (0.4%)

Road surface

  • Dry148 (63%)
  • Wet or damp82 (35%)
  • Frost or ice2 (0.9%)
  • Snow2 (0.9%)
  • Flood over 3cm deep1 (0.4%)

Type of road

  • Single carriageway229 (97%)
  • Dual carriageway2 (0.9%)
  • One way street or slip road2 (0.9%)
  • Roundabout1 (0.4%)
  • Not recorded1 (0.4%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4085 crashes

Car occupants make up 63% of the people killed or injured on the A4085, followed by motorcyclists (13%).

Casualties by road user

  • Car occupant204 (63%)
  • Motorcyclist42 (13%)
  • Pedestrian39 (12%)
  • Cyclist19 (5.9%)
  • Van occupant11 (3.4%)
  • Bus or coach occupant4 (1.2%)
  • Minibus occupant3 (0.9%)

Vehicles involved

  • Car284 (72%)
  • Motorcycle41 (10%)
  • Pedal cycle20 (5.1%)
  • Van or goods vehicle up to 3.5 tonnes19 (4.8%)
  • Goods vehicle over 3.5 tonnes7 (1.8%)
  • Other vehicle7 (1.8%)
  • Other17 (4.3%)
  • Not recorded1 (0.3%)

Casualties by age

  • 0 to 56 (1.9%)
  • 6 to 1018 (5.6%)
  • 11 to 1518 (5.6%)
  • 16 to 2051 (16%)
  • 21 to 2546 (14%)
  • 26 to 3552 (16%)
  • 36 to 4536 (11%)
  • 46 to 5528 (8.7%)
  • 56 to 6529 (9%)
  • 66 to 7524 (7.5%)
  • Over 7514 (4.3%)

Drivers, passengers and pedestrians

  • Driver or rider188 (58%)
  • Passenger95 (30%)
  • Pedestrian39 (12%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4085

Map of the 25 most recent crashes on the A4085

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4085 crashes by council area

Of the 235 collisions on the A4085, 234 were in Gwynedd.

Collisions on the A4085 in each area, 1979 to 2024
RankAreaCollisionsCasualtiesFatalSerious
1stGwynedd234321863

A4085 crashes by town

Collisions on the A4085 were recorded in 2 towns and built-up areas, led by Caernarfon (32) and Penrhyndeudraeth (15).

Recent crashes on the A4085

These are the 25 most recent collisions on the A4085, from 5 June 2014 to 19 March 2024.

Severity