A-road
A4161 traffic and collisions
The A4161 is an A-road of 6.0 miles, in Cardiff. This page covers its traffic at 6 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 63m vehicle miles
- Average daily traffic 28,803 vehicles a day, both directions
- Busiest section 56,706 Count point 92139
- HGV share 2.5% of vehicle miles
- Traffic since 2019 −11.1% same count points
- Collisions, 2021 to 2025 89 28.6 per 100m vehicle miles
How busy is the A4161?
On an average day in 2025, 28,803 vehicles passed each point on the A4161, counting both directions. The busiest section is Count point 92139 (Cardiff), with 56,706 a day; the quietest listed is A4160, with 15,469.
Busiest sections, 2025
Count point 92139 carries 2.0 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| Count point 92139 Cardiff · 1.1 mi · HGVs 5.2% | 56,706 |
| A4160 Fitzalan Place Cardiff · 1.1 mi · HGVs 1.0% | 32,918 |
| A4160 Fitzalan Place to A469 Albany Rd Cardiff · 0.8 mi · HGVs 1.3% | 23,210 |
| Count point 92136 Cardiff · 1.8 mi · HGVs 0.7% | 19,676 |
| A470 to A4160 Cardiff · 0.6 mi · HGVs 1.4% | 18,274 |
| A4160 Cardiff · 0.6 mi · HGVs 1.3% | 15,469 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
In Cardiff · 6.0 miles
A4161 traffic and collisions by section
6 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 | Count point 92139Cardiff | 56,706 | fewer than 3 |
| 2 | A4160 Fitzalan PlaceCardiff | 32,918 | 21 |
| 3 | A4160 Fitzalan Place to A469 Albany RdCardiff | 23,210 | 18 |
| 4 | A470 to A4160Cardiff | 18,274 | 25 |
| 5 | A4160Cardiff | 15,469 | 10 |
| 6 | Count point 92136Cardiff | 19,676 | 13 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A4161 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.
A4161 traffic by vehicle type
Cars and taxis make up 81.9% of the vehicle miles on the A4161. HGVs account for 2.5%, rising to 5.2% on Count point 92139.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 2.1% |
| 2001 | 2.2% |
| 2002 | 2.8% |
| 2003 | 2.8% |
| 2004 | 2.8% |
| 2005 | 2.8% |
| 2006 | 2.8% |
| 2007 | 2.8% |
| 2008 | 2.7% |
| 2009 | 1.8% |
| 2010 | 1.6% |
| 2011 | 1.7% |
| 2012 | 1.6% |
| 2013 | 2.0% |
| 2014 | 1.8% |
| 2015 | 1.9% |
| 2016 | 1.8% |
| 2017 | 2.0% |
| 2018 | 2.0% |
| 2019 | 2.0% |
| 2020 | 3.1% |
| 2021 | 3.0% |
| 2022 | 2.8% |
| 2023 | 2.6% |
| 2024 | 2.7% |
| 2025 | 2.5% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4161 traffic trend
Traffic on the A4161 came to 63.1 million vehicle miles in 2025. At the count points present in both years, it is down 11.1% on 2019, before the pandemic, and down 31.5% on 2015.
Vehicle miles a year
Like for like, traffic is down 48.9% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 74m |
| 2001 | 75m |
| 2002 | 80m |
| 2003 | 81m |
| 2004 | 78m |
| 2005 | 76m |
| 2006 | 77m |
| 2007 | 75m |
| 2008 | 69m |
| 2009 | 63m |
| 2010 | 61m |
| 2011 | 61m |
| 2012 | 60m |
| 2013 | 60m |
| 2014 | 63m |
| 2015 | 63m |
| 2016 | 62m |
| 2017 | 59m |
| 2018 | 59m |
| 2019 | 59m |
| 2020 | 54m |
| 2021 | 58m |
| 2022 | 63m |
| 2023 | 64m |
| 2024 | 63m |
| 2025 | 63m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 35,405 |
| 2001 | 35,940 |
| 2002 | 38,597 |
| 2003 | 38,859 |
| 2004 | 37,692 |
| 2005 | 36,590 |
| 2006 | 36,782 |
| 2007 | 35,993 |
| 2008 | 32,973 |
| 2009 | 30,080 |
| 2010 | 29,436 |
| 2011 | 29,428 |
| 2012 | 28,935 |
| 2013 | 28,847 |
| 2014 | 30,405 |
| 2015 | 30,154 |
| 2016 | 29,755 |
| 2017 | 28,470 |
| 2018 | 27,752 |
| 2019 | 27,874 |
| 2020 | 24,607 |
| 2021 | 26,518 |
| 2022 | 28,557 |
| 2023 | 29,093 |
| 2024 | 28,955 |
| 2025 | 28,803 |
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 (23.3% of today’s road for 2019). In 2025, 1 of the 6 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4161 collisions
Police recorded 89 collisions with the A4161 as the first road from 2021 to 2025, 15 of them fatal or serious. That is 28.6 per 100 million vehicle miles, close to the 31.5 for all A-roads in Great Britain. On average there were 3.0 a year for each mile of road.
Reported collisions by year
Down 19.0% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 21 |
| 2022 | 24 |
| 2023 | 17 |
| 2024 | 10 |
| 2025 | 17 |
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 |
|---|---|
| A470 to A4160 Cardiff · 25 collisions | 128.9 |
| A4160 Cardiff · 10 collisions | 56.5 |
| A4160 Fitzalan Place to A469 Albany Rd Cardiff · 18 collisions | 54.8 |
| A4160 Fitzalan Place Cardiff · 21 collisions | 32.8 |
| Count point 92136 Cardiff · 13 collisions | 20.8 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 19 collisions were recorded at junctions where the A4161 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. How we count collisions
Council areas on the A4161
In route order. Each is the highway authority DfT files the count points under.
- Cardiff
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 | 6 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 89 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.