Road risk in Gwynedd
Gwynedd ranks 91 of 192 British highway authorities on our road risk score. Here is what the official record shows, and how it compares.
Police recorded 105 injury collisions in Gwynedd in 2025, hurting 166 people, of whom 59 were killed or seriously injured and 6 were killed. Set against the traffic its roads actually carry, that is 85.3 killed or seriously injured per billion vehicle miles, 6% above the median ranked authority (80.5).
- Collisions
- 105 in 2025
- People hurt
- 166 casualties
- Killed or seriously injured
- 59
- Killed
- 6
- KSI per billion vehicle miles
- 85.3 (median 80.5)
- KSI, three-year average
- 53 a year
- Severity-adjusted KSI, 2025
- 84.5 (recorded: 59)
- Severity-adjusted KSI, three-year average
- 76.7 a year (recorded: 53)
- KSI per 100,000 residents
- 49 — rank 32
- Population
- 120,295
- Risk score
- 52.1/100 — rank 91 of 192
Compiled by Stephen Hall, Data lead, Swift Assist. Source: DfT STATS19 and DfT road traffic estimates (2025), OGL v3. Updated 2026-10-08.
Five years of collisions in Gwynedd
Across 2021–2025, recorded collisions were down 21.1%, with 2022 the worst year of the period at 164 collisions.
Collisions per year in Gwynedd
2025: 105 (up 22.1% on the year before) · peak 164 in 2022 · -21.1% across the period
Axis clipped to the data range to show year-on-year movement.
Gwynedd looks less dangerous per mile driven than per resident
Divide casualties by the people who live here and Gwynedd ranks 32. Divide by the miles actually driven on its roads and it ranks 91 — a difference of 59 places.
That gap runs the other way: relative to the traffic its roads carry, Gwynedd does less harm than its casualty count per resident implies. Places with heavy local travel and few through routes tend to look worse per head than the volume of driving warrants. Neither number is the true one. Which you should use depends on whether you are asking how safe it is to live somewhere or how safe it is to drive there.
Vehicle crime · year ending June 2026
Vehicle crime in Gwynedd
1.38
offences per 1,000 residents
167
offences recorded, 12 months
271
of 287 areas, worst first
Gwynedd recorded 1.38 vehicle offences per 1,000 residents, below the England and Wales rate of 5.04.
Rate calculated from 167 offences and a population of 120,800 (ONS mid-2024), both taken from the same ONS release. Contains public sector information licensed under the Open Government Licence v3.0. Source: Office for National Statistics, Crime in England and Wales: Police Force Area data tables, year ending June 2026; police recorded crime collected by the Home Office.
Pedestrians, cyclists and riders in Gwynedd
These are the road users with the least protection when something goes wrong, and they carry a disproportionate share of the serious injuries. Across 105 collisions in Gwynedd, the three groups appear 54 times between them — an involvement rate of 51.4%.
| Road user | Collisions | Share of all collisions |
|---|---|---|
| Pedestrians | 17 | 16.2% |
| Cyclists | 10 | 9.5% |
| Motorcyclists | 27 | 25.7% |
A single collision can involve more than one of these groups and is then counted in each row, so the rows do not add up to a share of the total.
When collisions happen in Gwynedd
DfT records the light level and road surface at every collision, but publishes neither below national level. These are Gwynedd’s own shares over 337 collisions, with the national figure beside each one for comparison.
| Share of collisions | Gwynedd | National | How it reads |
|---|---|---|---|
| In darknessAny collision where the officer recorded darkness, lit or unlit. | 23.4% | 28.7% | below the national figure |
| In darkness, no street lightingThe rural lighting picture rather than the urban speeding one. | 12.2% | 6.3% | roughly double the national figure |
| On a wet road surfaceWet, damp or standing water at the scene. | 24.6% | 24.5% | close to the national figure |
| On snow or iceRare everywhere, and concentrated in a handful of authorities. | 0.9% | 1.4% | well below the national figure |
On the darkness share, Gwynedd ranks 179 of 192 authorities, counting from the highest.
The winter effect. Collisions in Gwynedd run 46.5% lower from November to January than from May to July — against 4.5% lower nationally. That is 61 collisions against 114.
What this does not tell you
- A share is not a rate. A high darkness share means darkness accounts for more of Gwynedd’s collisions — not that its roads are more dangerous overall. Read it alongside the casualties-per-mile-driven figure above.
- Condition is recorded, not tested. The officer records the surface and light level at the scene. It is an observation, not a measurement, and it is not a finding that the condition caused the collision.
- Exposure is not controlled for. Fewer people travel at 3am than at 3pm, so a collision in darkness is drawn from a smaller pool of journeys. Without hourly traffic counts, these shares describe when collisions happen rather than how risky an hour is.
Every authority compared on the same measures: winter road risk across Britain.
Gwynedd against similar authorities
A national rank compares Gwynedd with places that may be nothing like it. This is the comparison a council actually uses: its statistical nearest neighbours — the authorities ONS identifies as most similar on population, economy and demography, restricted to the same tier, so counties are compared with counties. Within this group Gwynedd is 4 of 10 on casualties per mile driven, against a group median of 79.8.
| Authority | KSI / bn miles | Score | National rank |
|---|---|---|---|
| Powys | 161.2 | 65.7 | 32 |
| Ceredigion | 150.9 | 47.5 | 114 |
| Gwynedd (this page) | 85.3 | 52.1 | 91 |
| Cumberland | 82 | 54.5 | 76 |
| North Yorkshire | 77.5 | 53.6 | 82 |
| Northumberland | 71.2 | 36.6 | 154 |
| Dumfries and Galloway | 63.5 | 47.1 | 119 |
| Westmorland and Furness | 61.8 | 41.1 | 134 |
| Conwy | 58.4 | 38.1 | 148 |
Peer group: ONS statistical nearest neighbours, Open Government Licence v3. ONS notes the grouping is a snapshot that is not comparable with earlier editions, and is not a judgement about any authority’s performance. The road figures against it are ours.
Gwynedd against its closest comparators
Gwynedd sits 91 of 192 nationally, and 7 of 18 within Wales. These are the authorities nearest to it in the table.
| # | Authority | Score | KSI / bn miles |
|---|---|---|---|
| 89 | Darlington | 52.2 | 79.2 |
| 90 | Denbighshire | 52.2 | 96.2 |
| 91 | Gwynedd (this page) | 52.1 | 85.3 |
| 92 | Lancashire | 51.9 | 103.4 |
| 93 | Oldham | 51.7 | 105.7 |
Road risk in Gwynedd, answered
How dangerous are the roads in Gwynedd?
In the latest official DfT figures, 105 road collisions in Gwynedd injured or killed 166 people, 59 of them killed or seriously injured. Measured against the traffic its roads actually carry, that is 85.3 people killed or seriously injured per billion vehicle miles, against a median of 80.5 across the ranked authorities — placing Gwynedd 91 of 192 authorities on our combined score, where 1 is the highest risk. The score weighs that rate alongside who is being hurt, the five-year trend and how often a serious collision proves fatal, so the rank is not the rate alone.
Are road casualties in Gwynedd rising or falling?
Across 2021–2025, recorded collisions in Gwynedd were down 21.1%, with 2022 the worst year of the period at 164 collisions. Year-to-year movement in a single authority is noisy, so the five-year direction carries more than any single year's change.
Who is being hurt on Gwynedd's roads?
In Gwynedd there were 17 collisions involving pedestrians, 10 involving cyclists and 27 involving motorcyclists, out of 105 in total. Added together that is an involvement rate of 51.4%, though a collision involving two of those groups is counted in both figures, so it is a comparable index rather than a clean share.
Who is responsible for road safety in Gwynedd?
Gwynedd is a welsh principal area, and is the highway authority for its own roads. That means it sets local speed limits, designs junctions and crossings, and decides safety scheme spending. Motorways and most trunk roads are managed separately by National Highways in England, Transport Scotland, or the Welsh Government, so the worst road in an area is often not the council's to change. Enforcement sits with the local police force.
Where does this data come from?
DfT STATS19, the record police complete at the scene of every injury collision, published annually under the Open Government Licence, combined with DfT's own road traffic estimates for the mileage denominator. Collision, casualty and KSI counts on this page are for 2025; only the trend compares 2021–2025. STATS19 counts collisions police attended and recorded, so collisions never reported do not appear, and under-reporting is known to be worst for cyclists and for slight injuries.
What actually changes the odds in Gwynedd
Data is only useful if it changes what you do. These three are picked from Gwynedd’s own figures above, each with the number that prompted it. Every guide explains how the thing works before it suggests buying anything, and most cost less than a third of a typical insurance excess.
We are a data business, not a retailer: these link to our guides, which link on to retailers. Some of those links earn us a small commission at no cost to you, and we hold no stock and take no payment for placement. All security guides.
More on Gwynedd and UK road risk
All 192 British authorities ranked
The full sortable league table, with the method behind it.
Read more →Blackspots that were never fixed
Sites with injury collisions in every one of the last five years.
Read more →UK road risk: the national picture
What the official record says about Britain's roads overall.
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Read more →Free API
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