A-road
A499 traffic and collisions
The A499 is an A-road of 22.6 miles, in Gwynedd. This page covers its traffic at 5 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 52m vehicle miles
- Average daily traffic 6,299 vehicles a day, both directions
- Busiest section 7,453 B4413, Llanbedrog to A497
- HGV share 3.2% of vehicle miles
- Traffic since 2019 +4.2% same count points
- Collisions, 2021 to 2025 28 11.8 per 100m vehicle miles
How busy is the A499?
On an average day in 2025, 6,299 vehicles passed each point on the A499, counting both directions. The busiest section is B4413, Llanbedrog to A497 (Gwynedd), with 7,453 a day; the quietest listed is Lon Sarn Bach, Abersoch to B4413, Llanbedrog, with 2,845.
Busiest sections, 2025
B4413, Llanbedrog to A497 carries 1.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| B4413, Llanbedrog to A497 Gwynedd · 3.1 mi · HGVs 1.8% | 7,453 |
| B4417 Llanaelhaearn to A487 Gwynedd · 9.6 mi · HGVs 3.5% | 7,036 |
| A497 Pwllheli to B4354 Y Ffor Gwynedd · 2.9 mi · HGVs 3.0% | 6,265 |
| B4354 Y Ffor to B4417 Llanaelhaearn Gwynedd · 4.1 mi · HGVs 3.9% | 6,170 |
| Lon Sarn Bach, Abersoch to B4413, Llanbedrog Gwynedd · 2.9 mi · HGVs 2.7% | 2,845 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
In Gwynedd · 22.6 miles
A499 traffic and collisions by section
5 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | Lon Sarn Bach, Abersoch to B4413, LlanbedrogGwynedd | 2,845 | fewer than 3 |
| 2 | B4413, Llanbedrog to A497Gwynedd | 7,453 | 7 |
| 3 | A497 Pwllheli to B4354 Y FforGwynedd | 6,265 | 3 |
| 4 | B4354 Y Ffor to B4417 LlanaelhaearnGwynedd | 6,170 | 6 |
| 5 | B4417 Llanaelhaearn to A487Gwynedd | 7,036 | 10 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A499 as the first road, placed on the nearest section by their recorded position; rates (per 100 million vehicle miles) are shown for sections of half a mile or more with 10 or more.
A499 traffic by vehicle type
Cars and taxis make up 77.5% of the vehicle miles on the A499. HGVs account for 3.2%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.1% |
| 2001 | 4.1% |
| 2002 | 4.1% |
| 2003 | 4.1% |
| 2004 | 4.4% |
| 2005 | 4.5% |
| 2006 | 3.9% |
| 2007 | 4.3% |
| 2008 | 5.6% |
| 2009 | 5.2% |
| 2010 | 5.3% |
| 2011 | 5.2% |
| 2012 | 5.3% |
| 2013 | 5.3% |
| 2014 | 3.4% |
| 2015 | 3.5% |
| 2016 | 3.6% |
| 2017 | 3.6% |
| 2018 | 3.7% |
| 2019 | 3.7% |
| 2020 | 4.3% |
| 2021 | 4.2% |
| 2022 | 4.0% |
| 2023 | 3.4% |
| 2024 | 3.3% |
| 2025 | 3.2% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A499 traffic trend
Traffic on the A499 came to 52 million vehicle miles in 2025. At the count points present in both years, it is up 4.2% on 2019, before the pandemic, and up 6.4% on 2015.
Vehicle miles a year
Like for like, traffic is up 31.0% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 40m |
| 2001 | 41m |
| 2002 | 45m |
| 2003 | 47m |
| 2004 | 46m |
| 2005 | 46m |
| 2006 | 47m |
| 2007 | 46m |
| 2008 | 44m |
| 2009 | 45m |
| 2010 | 44m |
| 2011 | 45m |
| 2012 | 45m |
| 2013 | 45m |
| 2014 | 47m |
| 2015 | 49m |
| 2016 | 49m |
| 2017 | 50m |
| 2018 | 50m |
| 2019 | 50m |
| 2020 | 38m |
| 2021 | 42m |
| 2022 | 45m |
| 2023 | 48m |
| 2024 | 50m |
| 2025 | 52m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 4,807 |
| 2001 | 4,964 |
| 2002 | 5,487 |
| 2003 | 5,650 |
| 2004 | 5,623 |
| 2005 | 5,527 |
| 2006 | 5,635 |
| 2007 | 5,544 |
| 2008 | 5,348 |
| 2009 | 5,472 |
| 2010 | 5,381 |
| 2011 | 5,470 |
| 2012 | 5,499 |
| 2013 | 5,444 |
| 2014 | 5,699 |
| 2015 | 5,918 |
| 2016 | 5,948 |
| 2017 | 6,005 |
| 2018 | 6,034 |
| 2019 | 6,044 |
| 2020 | 4,589 |
| 2021 | 5,066 |
| 2022 | 5,475 |
| 2023 | 5,853 |
| 2024 | 6,108 |
| 2025 | 6,299 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
The chart counts the whole road as it was each year, so new or renumbered stretches move it. The percentage changes compare only count points present in both years. In 2025, 1 of the 5 count points were counted; DfT estimated the rest from earlier counts and local trends.
A499 collisions
Police recorded 28 collisions with the A499 as the first road from 2021 to 2025, 12 of them fatal or serious. That is 11.8 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.3 a year for each mile of road.
Reported collisions by year
Up 20.0% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 5 |
| 2022 | 9 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 6 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
Sections with the highest collision rates
Per 100 million vehicle miles, 2021 to 2025. Sections of half a mile or more with 10 or more collisions.
| Section | Per 100m vehicle miles |
|---|---|
| B4417 Llanaelhaearn to A487 Gwynedd · 10 collisions | 8.7 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
Fatal or serious uses DfT’s adjusted serious figures. How we count collisions
Council areas on the A499
In route order. Each is the highway authority DfT files the count points under.
- Gwynedd
Data sources and methodology
| Figures | Source | Period | Records | Updated |
|---|---|---|---|---|
| Traffic counts and vehicle mix | Road traffic statistics (AADF by count point) Department for Transport Derived statistics UK Motoring | 2000 to 2025 | 5 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 28 reported collisions | 15 September 2026 |
- Annual average daily flow (AADF) is the average number of vehicles passing a point on a typical day of the year, both directions combined.
- Vehicle miles are AADF multiplied by link length and 365, summed over every count point link on the road.
- Sections join count point links between junctions, using the link lines in DfT’s major road database.
- STATS19 covers personal injury collisions reported to the police. Damage-only collisions are not included, and not every injury collision is reported.
- Serious and slight figures are DfT’s adjusted estimates, which allow for police forces moving to injury-based reporting.
- Counts of one or two collisions below Great Britain level are shown as “fewer than 3”.
Contains public sector information licensed under the Open Government Licence v3.0.