A-road
A432 traffic and collisions
The A432 is an A-road of 13.9 miles, from South Gloucestershire to City of Bristol. This page covers its traffic at 6 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 53m vehicle miles
- Average daily traffic 10,499 vehicles a day, both directions
- Busiest section 11,350 Roundabout near M4 (connecting A432 and A4174) to A46
- HGV share 1.1% of vehicle miles
- Traffic since 2019 −2.7% same count points
- Collisions, 2021 to 2025 251 97.1 per 100m vehicle miles
How busy is the A432?
On an average day in 2025, 10,499 vehicles passed each point on the A432, counting both directions. The busiest section is Roundabout near M4 (connecting A432 and A4174) to A46 (South Gloucestershire), with 11,350 a day; the quietest listed is A4017 to Junction A4320/A432 (South of M32 J3), with 9,021.
Busiest sections, 2025
Roundabout near M4 (connecting A432 and A4174) to A46 carries 1.1 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| Roundabout near M4 (connecting A432 and A4174) to A46 South Gloucestershire · 8.6 mi · HGVs 1.2% | 11,350 |
| A4174 to A4017 South Gloucestershire · 1.2 mi · HGVs 1.0% | 9,611 |
| A4017 to Junction A4320/A432 (South of M32 J3) South Gloucestershire, City of Bristol · 3.6 mi · HGVs 1.0% | 9,021 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
South Gloucestershire to City of Bristol · 13.9 miles
A432 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 | Roundabout near M4 (connecting A432 and A4174) to A46South Gloucestershire | 11,350 | 17 |
| 2 | A4174 to A4017South Gloucestershire | 9,611 | 11 |
| 3 | At A4017South Gloucestershire | 22,046 | 0 |
| 4 | A4017 to Junction A4320/A432 (South of M32 J3)South Gloucestershire, City of Bristol | 9,021 | 177 |
| 5 | A420 to A4320City of Bristol | 5,290 | 15 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A432 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.
A432 traffic by vehicle type
Cars and taxis make up 83.3% of the vehicle miles on the A432. HGVs account for 1.1%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.9% |
| 2001 | 4.7% |
| 2002 | 4.3% |
| 2003 | 4.2% |
| 2004 | 4.2% |
| 2005 | 4.0% |
| 2006 | 3.9% |
| 2007 | 4.0% |
| 2008 | 4.1% |
| 2009 | 3.8% |
| 2010 | 3.9% |
| 2011 | 3.9% |
| 2012 | 3.7% |
| 2013 | 3.7% |
| 2014 | 3.5% |
| 2015 | 3.5% |
| 2016 | 3.4% |
| 2017 | 3.2% |
| 2018 | 3.2% |
| 2019 | 3.2% |
| 2020 | 3.7% |
| 2021 | 3.1% |
| 2022 | 1.2% |
| 2023 | 1.1% |
| 2024 | 1.1% |
| 2025 | 1.1% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A432 traffic trend
Traffic on the A432 came to 53.3 million vehicle miles in 2025. At the count points present in both years, it is down 2.7% on 2019, before the pandemic, and down 8.0% on 2015.
Vehicle miles a year
Like for like, traffic is down 11.0% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 64m |
| 2001 | 65m |
| 2002 | 67m |
| 2003 | 67m |
| 2004 | 66m |
| 2005 | 62m |
| 2006 | 63m |
| 2007 | 62m |
| 2008 | 62m |
| 2009 | 61m |
| 2010 | 61m |
| 2011 | 61m |
| 2012 | 61m |
| 2013 | 61m |
| 2014 | 63m |
| 2015 | 63m |
| 2016 | 64m |
| 2017 | 64m |
| 2018 | 63m |
| 2019 | 63m |
| 2020 | 48m |
| 2021 | 49m |
| 2022 | 51m |
| 2023 | 52m |
| 2024 | 53m |
| 2025 | 53m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 13,041 |
| 2001 | 13,146 |
| 2002 | 13,486 |
| 2003 | 13,598 |
| 2004 | 13,342 |
| 2005 | 12,632 |
| 2006 | 12,717 |
| 2007 | 12,615 |
| 2008 | 12,551 |
| 2009 | 12,334 |
| 2010 | 12,301 |
| 2011 | 12,440 |
| 2012 | 12,345 |
| 2013 | 12,401 |
| 2014 | 12,765 |
| 2015 | 12,806 |
| 2016 | 12,955 |
| 2017 | 12,994 |
| 2018 | 12,675 |
| 2019 | 12,695 |
| 2020 | 9,761 |
| 2021 | 9,589 |
| 2022 | 10,121 |
| 2023 | 10,301 |
| 2024 | 10,460 |
| 2025 | 10,499 |
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 (16.5% of today’s road for 2019). In 2025, 0 of the 6 count points were counted; DfT estimated the rest from earlier counts and local trends.
A432 collisions
Police recorded 251 collisions with the A432 as the first road from 2021 to 2025, 61 of them fatal or serious. That is 97.1 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 3.6 a year for each mile of road.
Reported collisions by year
Down 6.5% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 34 | 12 |
| 2022 | 54 | 16 |
| 2023 | 36 | 10 |
| 2024 | 34 | 12 |
| 2025 | 32 | 11 |
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 |
|---|---|
| A4017 to Junction A4320/A432 (South of M32 J3) South Gloucestershire, City of Bristol · 177 collisions | 303.6 |
| A4174 to A4017 South Gloucestershire · 11 collisions | 54.0 |
| Roundabout near M4 (connecting A432 and A4174) to A46 South Gloucestershire · 17 collisions | 9.9 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 32 collisions were recorded at junctions where the A432 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. 87.6% of the collisions could be placed on a section. How we count collisions
Council areas on the A432
In route order. Each is the highway authority DfT files the count points under.
- South Gloucestershire
- City of Bristol
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 | 251 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.