Road collisions in Gwynedd
Police recorded 636 road collisions involving injury in Gwynedd between 2021 and 2025, about 127 a year. 37 of them were fatal, and an estimated 291 involved serious injury once DfT's severity adjustment is applied. These are reported injury collisions only: damage-only incidents and unreported injuries are not included.
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When collisions happen
The busiest hour was 3pm to 4pm, and 33% of collisions happened between 3pm and 7pm (more than the 32% across Great Britain). Saturday had the most collisions, and 33% happened at weekends.
Trend over time
Reported collisions went from 134 in 2021 to 105 in 2025, a fall of 22%. Counts are affected by traffic levels, population and changes in how police record injuries, so Gwynedd should not be ranked against other areas on these numbers alone.
Who is affected
Across Gwynedd, 916 people were injured or killed in these collisions. Pedestrians were 11% of casualties (14% across Great Britain), pedal cyclists 6% (12%) and motorcyclists 18% (12%). Car and taxi occupants made up 61%. 6 of the pedestrians were killed.
Children aged 0 to 15 were 7% of casualties, lower than the 9% national share. People aged 16 to 25 were 25% (21% nationally), and people over 65 were 15% (10% nationally).
| Road user | Casualties | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Pedestrians | 99 | 10.8% | 14.5% |
| Pedal cyclists | 51 | 5.6% | 11.9% |
| Motorcyclists | 161 | 17.6% | 12.4% |
| Car and taxi occupants | 557 | 60.8% | 54.4% |
| Bus and minibus occupants | 7 | 0.8% | 1.8% |
| Van and goods vehicle occupants | 32 | 3.5% | 3.5% |
| Other road users | 9 | 1.0% | 1.6% |
Casualties by age
| Age | Casualties | Share in Gwynedd | Share across GB |
|---|---|---|---|
| 0 to 5 | 10 | 1.1% | 1.6% |
| 6 to 10 | 24 | 2.6% | 2.6% |
| 11 to 15 | 30 | 3.3% | 4.8% |
| 16 to 20 | 136 | 15.0% | 10.6% |
| 21 to 25 | 95 | 10.5% | 11.0% |
| 26 to 35 | 144 | 15.9% | 20.8% |
| 36 to 45 | 101 | 11.1% | 15.8% |
| 46 to 55 | 117 | 12.9% | 12.8% |
| 56 to 65 | 109 | 12.0% | 10.1% |
| 66 to 75 | 67 | 7.4% | 5.3% |
| Over 75 | 73 | 8.1% | 4.5% |
Vehicles involved
15.1% of collisions involved a pedestrian casualty (17.7% nationally), 8.0% a cyclist (15.0%) and 23.6% a motorcyclist (15.3%). 6.4% involved a goods vehicle (3.9% nationally) and 26.6% involved a driver aged 17 to 24 (21.1%). 2 collisions involved an e-scooter.
| Vehicle | Vehicles | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Cars and taxis | 726 | 67.5% | 69.7% |
| Vans (up to 3.5 tonnes) | 54 | 5.0% | 6.4% |
| Heavy goods vehicles | 44 | 4.1% | 2.3% |
| Motorcycles | 166 | 15.4% | 9.3% |
| Pedal cycles | 52 | 4.8% | 8.7% |
| Buses and minibuses | 14 | 1.3% | 1.8% |
| Other vehicles | 19 | 1.8% | 1.8% |
Numbered roads with the most collisions
44% of collisions happened on roads with a 30 mph limit or lower (69% nationally), and 48% on roads with a 60 or 70 mph limit (18% nationally). 38% were at or within 20 metres of a junction or roundabout, lower than the national 54%.
| Road | Collisions | Fatal | Serious (est.) |
|---|---|---|---|
| A487 | 78 | 10 | 33 |
| A494 | 42 | 6 | 21 |
| A496 | 34 | 1 | 23 |
| A5 | 34 | 1 | 18 |
| A497 | 30 | 0 | 14 |
| A499 | 28 | 2 | 10 |
| A493 | 26 | 3 | 15 |
| A470 | 21 | 1 | 11 |
| A4086 | 19 | 1 | 9 |
| A4212 | 14 | 1 | 7 |
| A498 | 14 | 0 | 8 |
| A4087 | 13 | 1 | 4 |
| A4244 | 11 | 0 | 6 |
| A55 | 10 | 1 | 4 |
| B4391 | 10 | 1 | 6 |
Collisions on unnumbered local streets are not listed here. Use the postcode search to see them.
Conditions
23% of collisions in Gwynedd happened in darkness, lower than the 28% across Great Britain. 9% happened on roads classed as urban, lower than the national 67%.
Type of road
| Type of road | Collisions | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Motorway | 0 | 0.0% | 3.0% |
| A(M) road | 0 | 0.0% | 0.2% |
| A road | 399 | 62.7% | 44.0% |
| B road | 64 | 10.1% | 12.5% |
| C road | 0 | 0.0% | 4.4% |
| Unclassified road | 173 | 27.2% | 35.9% |
Speed limit
| Speed limit | Collisions | Share in Gwynedd | Share across GB |
|---|---|---|---|
| 20 mph | 68 | 10.7% | 17.1% |
| 30 mph | 209 | 32.9% | 52.0% |
| 40 mph | 47 | 7.4% | 8.7% |
| 50 mph | 9 | 1.4% | 4.4% |
| 60 mph | 296 | 46.5% | 12.2% |
| 70 mph | 7 | 1.1% | 5.5% |
Junctions
| Junctions | Collisions | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Not at a junction | 394 | 61.9% | 45.9% |
| T or staggered junction | 113 | 17.8% | 28.5% |
| Crossroads | 18 | 2.8% | 9.5% |
| Junction with more than four arms | 7 | 1.1% | 1.6% |
| Private drive or entrance | 16 | 2.5% | 2.2% |
| Other junction | 62 | 9.7% | 6.1% |
| Roundabout | 26 | 4.1% | 6.2% |
Light conditions
| Light conditions | Collisions | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Daylight | 490 | 77.0% | 71.7% |
| Darkness, street lights lit | 49 | 7.7% | 20.6% |
| Darkness, street lights unlit | 2 | 0.3% | 0.7% |
| Darkness, no street lighting | 81 | 12.7% | 5.3% |
| Darkness, lighting unknown | 14 | 2.2% | 1.7% |
Urban or rural
| Urban or rural | Collisions | Share in Gwynedd | Share across GB |
|---|---|---|---|
| Urban | 57 | 9.0% | 67.2% |
| Rural | 578 | 91.0% | 32.8% |
About these figures
Only collisions involving injury that were reported to the police are counted. The figures are not adjusted for traffic volume or population, so they should not be used to rank areas against each other. Serious and slight splits use the Department for Transport's severity adjustment. Full explanation.