A-road
A4175 traffic and collisions
The A4175 is an A-road of 6.0 miles, from South Gloucestershire to Bath and North East Somerset. This page covers its traffic at 8 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 27m vehicle miles
- Average daily traffic 12,184 vehicles a day, both directions
- Busiest section 14,422 A431 to B3116
- HGV share 1.9% of vehicle miles
- Traffic since 2019 −3.1% same count points
- Collisions, 2021 to 2025 38 29.0 per 100m vehicle miles
How busy is the A4175?
On an average day in 2025, 12,184 vehicles passed each point on the A4175, counting both directions. The busiest section is A431 to B3116 (South Gloucestershire, Bath and North East Somerset), with 14,422 a day; the quietest listed is A420 to A431, with 9,042.
Busiest sections, 2025
A431 to B3116 carries 1.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A431 to B3116 South Gloucestershire, Bath and North East Somerset · 1.4 mi · HGVs 0.9% | 14,422 |
| A4174 roundabout to road from Stockwood Hill Bath and North East Somerset · 0.6 mi · HGVs 3.3% | 14,009 |
| A4175 Station Road Link to B4465 Broad St South Gloucestershire · 1.0 mi · HGVs 1.5% | 13,062 |
| A420 to A431 South Gloucestershire · 2.2 mi · HGVs 2.3% | 9,042 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
South Gloucestershire to Bath and North East Somerset · 6.0 miles
A4175 traffic and collisions by section
7 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 | B4465 to A4017South Gloucestershire | 8,413 | 3 |
| 2 | A4175 Station Road Link to B4465 Broad StSouth Gloucestershire | 13,062 | 6 |
| 3 | A4175 Station Rd to A4174 Avon Ring RdSouth Gloucestershire | 19,650 | fewer than 3 |
| 4 | A420 to A431South Gloucestershire | 9,042 | 10 |
| 5 | A431 to B3116South Gloucestershire, Bath and North East Somerset | 14,422 | 12 |
| 6 | B3116 to road to Stockwood HillBath and North East Somerset | 14,849 | 4 |
| 7 | A4174 roundabout to road from Stockwood HillBath and North East Somerset | 14,009 | 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 A4175 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.
A4175 traffic by vehicle type
Cars and taxis make up 81.2% of the vehicle miles on the A4175. HGVs account for 1.9%, rising to 3.3% on A4174 roundabout to road from Stockwood Hill.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.0% |
| 2001 | 2.6% |
| 2002 | 2.2% |
| 2003 | 2.1% |
| 2004 | 2.3% |
| 2005 | 2.1% |
| 2006 | 2.0% |
| 2007 | 2.3% |
| 2008 | 2.0% |
| 2009 | 1.6% |
| 2010 | 1.5% |
| 2011 | 1.6% |
| 2012 | 1.6% |
| 2013 | 1.5% |
| 2014 | 1.4% |
| 2015 | 1.4% |
| 2016 | 1.4% |
| 2017 | 1.7% |
| 2018 | 1.9% |
| 2019 | 1.9% |
| 2020 | 2.0% |
| 2021 | 2.0% |
| 2022 | 2.0% |
| 2023 | 1.9% |
| 2024 | 1.9% |
| 2025 | 1.9% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4175 traffic trend
Traffic on the A4175 came to 26.7 million vehicle miles in 2025. At the count points present in both years, it is down 3.1% on 2019, before the pandemic, and about the same as in 2015.
Vehicle miles a year
Like for like, traffic is down 10.8% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 33m |
| 2001 | 32m |
| 2002 | 28m |
| 2003 | 24m |
| 2004 | 25m |
| 2005 | 25m |
| 2006 | 25m |
| 2007 | 27m |
| 2008 | 26m |
| 2009 | 27m |
| 2010 | 26m |
| 2011 | 26m |
| 2012 | 25m |
| 2013 | 25m |
| 2014 | 26m |
| 2015 | 27m |
| 2016 | 27m |
| 2017 | 28m |
| 2018 | 27m |
| 2019 | 28m |
| 2020 | 22m |
| 2021 | 25m |
| 2022 | 27m |
| 2023 | 27m |
| 2024 | 26m |
| 2025 | 27m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 13,319 |
| 2001 | 13,024 |
| 2002 | 12,854 |
| 2003 | 10,912 |
| 2004 | 11,216 |
| 2005 | 11,426 |
| 2006 | 11,483 |
| 2007 | 12,137 |
| 2008 | 11,741 |
| 2009 | 12,175 |
| 2010 | 11,742 |
| 2011 | 11,638 |
| 2012 | 11,529 |
| 2013 | 11,540 |
| 2014 | 11,880 |
| 2015 | 12,182 |
| 2016 | 12,457 |
| 2017 | 12,634 |
| 2018 | 12,512 |
| 2019 | 12,571 |
| 2020 | 10,223 |
| 2021 | 11,261 |
| 2022 | 12,104 |
| 2023 | 12,347 |
| 2024 | 11,987 |
| 2025 | 12,184 |
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 8 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4175 collisions
Police recorded 38 collisions with the A4175 as the first road from 2021 to 2025, 11 of them fatal or serious. That is 29.0 per 100 million vehicle miles, close to the 31.5 for all A-roads in Great Britain. On average there were 1.3 a year for each mile of road.
Reported collisions by year
About the same in 2025 as in 2021.
| Year | Collisions |
|---|---|
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 4 |
| 2024 | 7 |
| 2025 | 10 |
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 |
|---|---|
| A431 to B3116 South Gloucestershire, Bath and North East Somerset · 12 collisions | 31.0 |
| A420 to A431 South Gloucestershire · 10 collisions | 28.5 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 16 collisions were recorded at junctions where the A4175 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 A4175
In route order. Each is the highway authority DfT files the count points under.
- South Gloucestershire
- Bath and North East Somerset
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 | 8 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 38 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.