A-road
A335 traffic and collisions
The A335 is an A-road of 9.1 miles, from Hampshire to Southampton. This page covers its traffic at 10 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 56m vehicle miles
- Average daily traffic 16,942 vehicles a day, both directions
- Busiest section 31,027 M27 to A27/A35
- HGV share 2.5% of vehicle miles
- Traffic since 2019 −8.8% same count points
- Collisions, 2021 to 2025 174 64.4 per 100m vehicle miles
How busy is the A335?
On an average day in 2025, 16,942 vehicles passed each point on the A335, counting both directions. The busiest section is M27 to A27/A35 (Hampshire, Southampton), with 31,027 a day; the quietest listed is B3335 Allbrook Hill to B3037, with 10,790.
Busiest sections, 2025
M27 to A27/A35 carries 1.8 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| M27 to A27/A35 Hampshire, Southampton · 0.7 mi · HGVs 2.5% | 31,027 |
| A35 to A3035 Southampton · 1.4 mi · HGVs 3.1% | 20,819 |
| M3 to B3335 Allbrook Hill Hampshire · 0.9 mi · HGVs 1.8% | 18,986 |
| South St to M27 Hampshire · 1.0 mi · HGVs 2.6% | 17,629 |
| B3037 to South St Hampshire · 0.9 mi · HGVs 2.4% | 15,755 |
| A3035 to A33 Southampton · 1.3 mi · HGVs 1.3% | 13,550 |
| B3335 Allbrook Hill to B3037 Hampshire · 1.2 mi · HGVs 0.5% | 10,790 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Hampshire to Southampton · 9.1 miles
A335 traffic and collisions by section
7 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 2 short link roads and spurs (1.7 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | M3 to B3335 Allbrook HillHampshire | 18,986 | 3 |
| 2 | B3335 Allbrook Hill to B3037Hampshire | 10,790 | 7 |
| 3 | B3037 to South StHampshire | 15,755 | 19 |
| 4 | South St to M27Hampshire | 17,629 | 10 |
| 5 | M27 to A27/A35Hampshire, Southampton | 31,027 | 14 |
| 6 | A35 to A3035Southampton | 20,819 | 30 |
| 7 | A3035 to A33Southampton | 13,550 | 46 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A335 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.
A335 traffic by vehicle type
Cars and taxis make up 80.0% of the vehicle miles on the A335. HGVs account for 2.5%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.8% |
| 2001 | 3.2% |
| 2002 | 3.6% |
| 2003 | 3.9% |
| 2004 | 4.2% |
| 2005 | 3.9% |
| 2006 | 3.3% |
| 2007 | 3.3% |
| 2008 | 3.5% |
| 2009 | 3.0% |
| 2010 | 3.2% |
| 2011 | 3.2% |
| 2012 | 2.9% |
| 2013 | 3.0% |
| 2014 | 3.0% |
| 2015 | 2.8% |
| 2016 | 3.0% |
| 2017 | 2.9% |
| 2018 | 3.1% |
| 2019 | 3.1% |
| 2020 | 3.6% |
| 2021 | 3.5% |
| 2022 | 3.1% |
| 2023 | 2.8% |
| 2024 | 2.5% |
| 2025 | 2.5% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A335 traffic trend
Traffic on the A335 came to 56.3 million vehicle miles in 2025. At the count points present in both years, it is down 8.8% on 2019, before the pandemic, and down 7.9% on 2015.
Vehicle miles a year
Like for like, traffic is down 7.5% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 57m |
| 2001 | 56m |
| 2002 | 60m |
| 2003 | 59m |
| 2004 | 61m |
| 2005 | 60m |
| 2006 | 60m |
| 2007 | 59m |
| 2008 | 58m |
| 2009 | 57m |
| 2010 | 56m |
| 2011 | 56m |
| 2012 | 57m |
| 2013 | 57m |
| 2014 | 58m |
| 2015 | 59m |
| 2016 | 59m |
| 2017 | 60m |
| 2018 | 63m |
| 2019 | 60m |
| 2020 | 46m |
| 2021 | 50m |
| 2022 | 53m |
| 2023 | 55m |
| 2024 | 55m |
| 2025 | 56m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 17,784 |
| 2001 | 17,468 |
| 2002 | 18,654 |
| 2003 | 18,494 |
| 2004 | 18,922 |
| 2005 | 18,589 |
| 2006 | 18,637 |
| 2007 | 18,470 |
| 2008 | 17,949 |
| 2009 | 17,646 |
| 2010 | 17,451 |
| 2011 | 17,547 |
| 2012 | 17,721 |
| 2013 | 17,720 |
| 2014 | 18,153 |
| 2015 | 18,262 |
| 2016 | 18,425 |
| 2017 | 18,702 |
| 2018 | 19,023 |
| 2019 | 18,312 |
| 2020 | 14,234 |
| 2021 | 15,525 |
| 2022 | 16,271 |
| 2023 | 17,035 |
| 2024 | 17,055 |
| 2025 | 16,942 |
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, 2 of the 10 count points were counted; DfT estimated the rest from earlier counts and local trends.
A335 collisions
Police recorded 174 collisions with the A335 as the first road from 2021 to 2025, 38 of them fatal or serious. That is 64.4 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 3.8 a year for each mile of road.
Reported collisions by year
Down 47.6% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 32 | 10 |
| 2022 | 25 | 8 |
| 2023 | 31 | 9 |
| 2024 | 30 | 7 |
| 2025 | 18 | 4 |
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 |
|---|---|
| A3035 to A33 Southampton · 46 collisions | 135.6 |
| B3037 to South St Hampshire · 19 collisions | 75.8 |
| A35 to A3035 Southampton · 30 collisions | 57.5 |
| M27 to A27/A35 Hampshire, Southampton · 14 collisions | 35.5 |
| South St to M27 Hampshire · 10 collisions | 31.8 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 22 collisions were recorded at junctions where the A335 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. 74.1% of the collisions could be placed on a section. How we count collisions
Council areas on the A335
In route order. Each is the highway authority DfT files the count points under.
- Hampshire
- Southampton
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 | 10 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 174 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.