A-road
A4174 traffic and collisions
The A4174 is an A-road of 18.7 miles, from South Gloucestershire to North Somerset. This page covers its traffic at 16 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 243m vehicle miles
- Average daily traffic 35,534 vehicles a day, both directions
- Busiest section 71,041 M32 to Bromley Heath Roundabout
- HGV share 3.1% of vehicle miles
- Traffic since 2019 +6.9% same count points
- Collisions, 2021 to 2025 232 20.3 per 100m vehicle miles
How busy is the A4174?
On an average day in 2025, 35,534 vehicles passed each point on the A4174, counting both directions. The busiest section is M32 to Bromley Heath Roundabout (South Gloucestershire), with 71,041 a day; the quietest listed is At B3130 Barrow Lane, with 13,171.
Busiest sections, 2025
M32 to Bromley Heath Roundabout carries 2.0 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| M32 to Bromley Heath Roundabout South Gloucestershire · 1.0 mi · HGVs 3.1% | 71,041 |
| A38 to M32 South Gloucestershire · 2.5 mi · HGVs 1.4% | 48,055 |
| B4465 to Station Road Link South Gloucestershire · 1.3 mi · HGVs 2.6% | 46,893 |
| A420 to A4174 spur South Gloucestershire · 1.4 mi · HGVs 2.4% | 43,763 |
| Station Road Link to A420 South Gloucestershire · 0.8 mi · HGVs 2.9% | 43,220 |
| A4174 spur to A4 South Gloucestershire · 1.6 mi · HGVs 2.6% | 41,712 |
| A432 to Emersons Way roundabout South Gloucestershire · 1.5 mi · HGVs 5.4% | 41,061 |
| A4174 to A432 South Gloucestershire · 1.0 mi · HGVs 5.8% | 37,880 |
| B3130 Barrow Street to Council boundary North Somerset · 1.2 mi · HGVs 3.7% | 26,556 |
| A37 to Hartcliffe Way roundabout City of Bristol · 1.9 mi · HGVs 3.8% | 21,101 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
South Gloucestershire to North Somerset · 18.7 miles
A4174 traffic and collisions by section
14 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 1 short link roads and spurs (0.6 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A38 to M32South Gloucestershire | 48,055 | 51 |
| 2 | M32 to Bromley Heath RoundaboutSouth Gloucestershire | 71,041 | 21 |
| 3 | A4174 to A432South Gloucestershire | 37,880 | 14 |
| 4 | A432 to Emersons Way roundaboutSouth Gloucestershire | 41,061 | 20 |
| 5 | Emersons Way roundabout to B4465South Gloucestershire | 33,670 | 3 |
| 6 | B4465 to Station Road LinkSouth Gloucestershire | 46,893 | 6 |
| 7 | Station Road Link to A420South Gloucestershire | 43,220 | 5 |
| 8 | A420 to A4174 spurSouth Gloucestershire | 43,763 | 14 |
| 9 | A4174 spur to A4South Gloucestershire | 41,712 | 6 |
| 10 | A4 to Council boundaryBath and North East Somerset | 41,712 | 6 |
| 11 | A4 to A37City of Bristol | 16,807 | 12 |
| 12 | A37 to Hartcliffe Way roundaboutCity of Bristol | 21,101 | 32 |
| 13 | At B3130 Barrow LaneCity of Bristol, North Somerset | 13,171 | 28 |
| 14 | B3130 Barrow Street to Council boundaryNorth Somerset | 26,556 | 12 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A4174 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.
A4174 traffic by vehicle type
Cars and taxis make up 79.5% of the vehicle miles on the A4174. HGVs account for 3.1%, rising to 5.8% on A4174 to A432.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.5% |
| 2001 | 4.0% |
| 2002 | 4.1% |
| 2003 | 4.2% |
| 2004 | 4.2% |
| 2005 | 4.2% |
| 2006 | 4.2% |
| 2007 | 4.0% |
| 2008 | 3.9% |
| 2009 | 3.8% |
| 2010 | 3.8% |
| 2011 | 3.7% |
| 2012 | 3.5% |
| 2013 | 3.6% |
| 2014 | 3.7% |
| 2015 | 3.7% |
| 2016 | 3.6% |
| 2017 | 3.4% |
| 2018 | 3.5% |
| 2019 | 3.4% |
| 2020 | 4.1% |
| 2021 | 4.0% |
| 2022 | 3.7% |
| 2023 | 3.4% |
| 2024 | 3.3% |
| 2025 | 3.1% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4174 traffic trend
Traffic on the A4174 came to 243 million vehicle miles in 2025. At the count points present in both years, it is up 6.9% on 2019, before the pandemic, and up 14.3% on 2015.
Vehicle miles a year
Like for like, traffic is up 59.6% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 115m |
| 2001 | 120m |
| 2002 | 163m |
| 2003 | 169m |
| 2004 | 171m |
| 2005 | 171m |
| 2006 | 178m |
| 2007 | 179m |
| 2008 | 178m |
| 2009 | 174m |
| 2010 | 175m |
| 2011 | 176m |
| 2012 | 176m |
| 2013 | 184m |
| 2014 | 190m |
| 2015 | 188m |
| 2016 | 192m |
| 2017 | 219m |
| 2018 | 229m |
| 2019 | 235m |
| 2020 | 186m |
| 2021 | 206m |
| 2022 | 220m |
| 2023 | 236m |
| 2024 | 239m |
| 2025 | 243m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 23,282 |
| 2001 | 24,389 |
| 2002 | 28,930 |
| 2003 | 30,088 |
| 2004 | 30,331 |
| 2005 | 30,366 |
| 2006 | 31,581 |
| 2007 | 31,779 |
| 2008 | 31,728 |
| 2009 | 30,957 |
| 2010 | 31,051 |
| 2011 | 31,044 |
| 2012 | 31,048 |
| 2013 | 32,597 |
| 2014 | 33,542 |
| 2015 | 33,185 |
| 2016 | 33,997 |
| 2017 | 30,771 |
| 2018 | 30,623 |
| 2019 | 31,390 |
| 2020 | 24,789 |
| 2021 | 30,137 |
| 2022 | 32,158 |
| 2023 | 34,567 |
| 2024 | 34,937 |
| 2025 | 35,534 |
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, 4 of the 16 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4174 collisions
Police recorded 232 collisions with the A4174 as the first road from 2021 to 2025, 70 of them fatal or serious, including 6 fatal. That is 20.3 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 2.5 a year for each mile of road.
Reported collisions by year
Down 25.0% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 30 | 14 |
| 2022 | 37 | 14 |
| 2023 | 39 | 14 |
| 2024 | 35 | 16 |
| 2025 | 20 | 13 |
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 |
|---|---|
| At B3130 Barrow Lane City of Bristol, North Somerset · 28 collisions | 52.7 |
| A4 to A37 City of Bristol · 12 collisions | 45.3 |
| A37 to Hartcliffe Way roundabout City of Bristol · 32 collisions | 45.2 |
| A38 to M32 South Gloucestershire · 51 collisions | 25.5 |
| B3130 Barrow Street to Council boundary North Somerset · 12 collisions | 22.4 |
| A4174 to A432 South Gloucestershire · 14 collisions | 21.0 |
| A432 to Emersons Way roundabout South Gloucestershire · 20 collisions | 18.4 |
| M32 to Bromley Heath Roundabout South Gloucestershire · 21 collisions | 17.1 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 47 collisions were recorded at junctions where the A4174 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. 99.1% of the collisions could be placed on a section. How we count collisions
Council areas on the A4174
In route order. Each is the highway authority DfT files the count points under.
- South Gloucestershire
- Bath and North East Somerset
- City of Bristol
- North 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 | 16 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 232 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.