A-road
A4063 traffic and collisions
The A4063 is an A-road of 13.3 miles, from Bridgend to Neath Port Talbot. This page covers its traffic at 9 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 53m vehicle miles
- Average daily traffic 10,866 vehicles a day, both directions
- Busiest section 17,067 B4281 roundabout to A4065
- HGV share 1.8% of vehicle miles
- Traffic since 2019 −2.1% same count points
- Collisions, 2021 to 2025 47 18.8 per 100m vehicle miles
How busy is the A4063?
On an average day in 2025, 10,866 vehicles passed each point on the A4063, counting both directions. The busiest section is B4281 roundabout to A4065 (Bridgend), with 17,067 a day; the quietest listed is Church St, Caerau, Maesteg to A4107, with 2,734.
Busiest sections, 2025
B4281 roundabout to A4065 carries 1.6 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| B4281 roundabout to A4065 Bridgend · 0.5 mi · HGVs 2.1% | 17,067 |
| A4065 to Maiden St, Maesteg Bridgend · 4.8 mi · HGVs 2.5% | 11,968 |
| Maiden St, Maesteg to B4282 Neath Rd Bridgend · 1.2 mi · HGVs 2.4% | 11,746 |
| A4061 to B4281 roundabout Bridgend · 2.2 mi · HGVs 0.7% | 11,708 |
| B4282 Neath Rd to Church St, Caerau, Maesteg Bridgend · 2.2 mi · HGVs 0.7% | 6,941 |
| Church St, Caerau, Maesteg to A4107 Bridgend, Neath Port Talbot · 1.3 mi · HGVs 1.2% | 2,734 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Bridgend to Neath Port Talbot · 13.3 miles
A4063 traffic and collisions by section
7 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 1 short link roads and spurs (1.0 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A4063 to A473Bridgend | 26,579 | fewer than 3 |
| 2 | A4061 to B4281 roundaboutBridgend | 11,708 | fewer than 3 |
| 3 | B4281 roundabout to A4065Bridgend | 17,067 | fewer than 3 |
| 4 | A4065 to Maiden St, MaestegBridgend | 11,968 | 16 |
| 5 | Maiden St, Maesteg to B4282 Neath RdBridgend | 11,746 | 6 |
| 6 | B4282 Neath Rd to Church St, Caerau, MaestegBridgend | 6,941 | 8 |
| 7 | Church St, Caerau, Maesteg to A4107Bridgend, Neath Port Talbot | 2,734 | fewer than 3 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A4063 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.
A4063 traffic by vehicle type
Cars and taxis make up 82.0% of the vehicle miles on the A4063. HGVs account for 1.8%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.6% |
| 2001 | 3.0% |
| 2002 | 3.0% |
| 2003 | 2.9% |
| 2004 | 2.8% |
| 2005 | 3.0% |
| 2006 | 2.9% |
| 2007 | 2.8% |
| 2008 | 2.7% |
| 2009 | 2.2% |
| 2010 | 2.2% |
| 2011 | 2.2% |
| 2012 | 2.3% |
| 2013 | 2.3% |
| 2014 | 2.2% |
| 2015 | 2.1% |
| 2016 | 2.1% |
| 2017 | 2.1% |
| 2018 | 2.1% |
| 2019 | 1.9% |
| 2020 | 2.2% |
| 2021 | 2.2% |
| 2022 | 2.1% |
| 2023 | 2.0% |
| 2024 | 1.9% |
| 2025 | 1.8% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4063 traffic trend
Traffic on the A4063 came to 52.7 million vehicle miles in 2025. At the count points present in both years, it is down 2.1% on 2019, before the pandemic, and up 0.5% on 2015.
Vehicle miles a year
Like for like, traffic is up 9.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 51m |
| 2001 | 50m |
| 2002 | 52m |
| 2003 | 48m |
| 2004 | 49m |
| 2005 | 48m |
| 2006 | 48m |
| 2007 | 51m |
| 2008 | 50m |
| 2009 | 49m |
| 2010 | 49m |
| 2011 | 50m |
| 2012 | 53m |
| 2013 | 53m |
| 2014 | 54m |
| 2015 | 54m |
| 2016 | 56m |
| 2017 | 54m |
| 2018 | 54m |
| 2019 | 54m |
| 2020 | 42m |
| 2021 | 46m |
| 2022 | 49m |
| 2023 | 50m |
| 2024 | 52m |
| 2025 | 53m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 10,699 |
| 2001 | 10,480 |
| 2002 | 10,821 |
| 2003 | 9,969 |
| 2004 | 10,141 |
| 2005 | 10,054 |
| 2006 | 10,076 |
| 2007 | 10,640 |
| 2008 | 10,419 |
| 2009 | 10,231 |
| 2010 | 10,320 |
| 2011 | 10,424 |
| 2012 | 11,046 |
| 2013 | 10,995 |
| 2014 | 11,288 |
| 2015 | 11,383 |
| 2016 | 11,686 |
| 2017 | 11,183 |
| 2018 | 11,185 |
| 2019 | 11,094 |
| 2020 | 8,568 |
| 2021 | 9,432 |
| 2022 | 10,156 |
| 2023 | 10,373 |
| 2024 | 10,741 |
| 2025 | 10,866 |
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 9 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4063 collisions
Police recorded 47 collisions with the A4063 as the first road from 2021 to 2025, 15 of them fatal or serious. That is 18.8 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.7 a year for each mile of road.
Reported collisions by year
About the same in 2025 as in 2021.
| Year | Collisions |
|---|---|
| 2021 | 12 |
| 2022 | 7 |
| 2023 | 7 |
| 2024 | 9 |
| 2025 | 12 |
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 |
|---|---|
| A4065 to Maiden St, Maesteg Bridgend · 16 collisions | 15.9 |
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 A4063
In route order. Each is the highway authority DfT files the count points under.
- Bridgend
- Neath Port Talbot
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 | 9 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 47 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.