A-road
A337 traffic and collisions
The A337 is an A-road of 21.6 miles, from Hampshire to Bournemouth, Christchurch and Poole. This page covers its traffic at 10 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 125m vehicle miles
- Average daily traffic 15,846 vehicles a day, both directions
- Busiest section 24,306 B3058 to A35 Somerford Roundabout
- HGV share 1.8% of vehicle miles
- Traffic since 2019 −2.8% same count points
- Collisions, 2021 to 2025 150 24.4 per 100m vehicle miles
How busy is the A337?
On an average day in 2025, 15,846 vehicles passed each point on the A337, counting both directions. The busiest section is B3058 to A35 Somerford Roundabout (Hampshire, Bournemouth, Christchurch and Poole), with 24,306 a day; the quietest listed is At A35, with 7,128.
Busiest sections, 2025
B3058 to A35 Somerford Roundabout carries 1.5 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| B3058 to A35 Somerford Roundabout Hampshire, Bournemouth, Christchurch and Poole · 4.4 mi · HGVs 1.5% | 24,306 |
| B3054 to Haglane Copse Hampshire · 1.1 mi · HGVs 1.8% | 17,804 |
| Haglane Copse, Lymington to Caird Ave Hampshire · 4.3 mi · HGVs 1.6% | 15,396 |
| A35 to B3055 Hampshire · 3.5 mi · HGVs 1.9% | 14,218 |
| A31 to A35 Hampshire · 3.4 mi · HGVs 2.0% | 13,500 |
| At B3054 Hampshire · 0.6 mi · HGVs 1.2% | 11,435 |
| B3055 to B3054 Hampshire · 3.6 mi · HGVs 2.3% | 11,122 |
| At A35 Hampshire · 0.5 mi · HGVs 2.5% | 7,128 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Hampshire to Bournemouth, Christchurch and Poole · 21.6 miles
A337 traffic and collisions by section
9 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 | A31 to A35Hampshire | 13,500 | 18 |
| 2 | At A35Hampshire | 7,128 | 4 |
| 3 | A35 to B3055Hampshire | 14,218 | 14 |
| 4 | B3055 to B3054Hampshire | 11,122 | 15 |
| 5 | At B3054Hampshire | 11,435 | 3 |
| 6 | B3054 to Haglane CopseHampshire | 17,804 | 25 |
| 7 | Haglane Copse, Lymington to Caird AveHampshire | 15,396 | 25 |
| 8 | Caird Ave to B3058Hampshire | 17,090 | fewer than 3 |
| 9 | B3058 to A35 Somerford RoundaboutHampshire, Bournemouth, Christchurch and Poole | 24,306 | 43 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A337 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.
A337 traffic by vehicle type
Cars and taxis make up 82.8% of the vehicle miles on the A337. 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 | 3.1% |
| 2001 | 3.0% |
| 2002 | 2.6% |
| 2003 | 2.5% |
| 2004 | 2.8% |
| 2005 | 2.9% |
| 2006 | 3.1% |
| 2007 | 2.7% |
| 2008 | 2.7% |
| 2009 | 2.5% |
| 2010 | 2.3% |
| 2011 | 2.3% |
| 2012 | 2.2% |
| 2013 | 2.2% |
| 2014 | 2.2% |
| 2015 | 2.2% |
| 2016 | 2.0% |
| 2017 | 2.0% |
| 2018 | 2.0% |
| 2019 | 2.0% |
| 2020 | 2.8% |
| 2021 | 2.5% |
| 2022 | 2.4% |
| 2023 | 2.4% |
| 2024 | 1.8% |
| 2025 | 1.8% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A337 traffic trend
Traffic on the A337 came to 125 million vehicle miles in 2025. At the count points present in both years, it is down 2.8% on 2019, before the pandemic, and down 1.4% on 2015.
Vehicle miles a year
Like for like, traffic is up 5.8% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 118m |
| 2001 | 125m |
| 2002 | 123m |
| 2003 | 127m |
| 2004 | 129m |
| 2005 | 126m |
| 2006 | 128m |
| 2007 | 130m |
| 2008 | 127m |
| 2009 | 125m |
| 2010 | 124m |
| 2011 | 125m |
| 2012 | 122m |
| 2013 | 122m |
| 2014 | 124m |
| 2015 | 126m |
| 2016 | 129m |
| 2017 | 129m |
| 2018 | 132m |
| 2019 | 129m |
| 2020 | 101m |
| 2021 | 114m |
| 2022 | 123m |
| 2023 | 129m |
| 2024 | 124m |
| 2025 | 125m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 14,905 |
| 2001 | 15,909 |
| 2002 | 15,570 |
| 2003 | 16,045 |
| 2004 | 16,375 |
| 2005 | 15,926 |
| 2006 | 16,213 |
| 2007 | 16,459 |
| 2008 | 16,041 |
| 2009 | 15,838 |
| 2010 | 15,719 |
| 2011 | 15,799 |
| 2012 | 15,502 |
| 2013 | 15,499 |
| 2014 | 15,703 |
| 2015 | 16,015 |
| 2016 | 16,355 |
| 2017 | 16,324 |
| 2018 | 16,610 |
| 2019 | 16,299 |
| 2020 | 12,832 |
| 2021 | 14,444 |
| 2022 | 15,612 |
| 2023 | 16,321 |
| 2024 | 15,708 |
| 2025 | 15,846 |
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, 0 of the 10 count points were counted; DfT estimated the rest from earlier counts and local trends.
A337 collisions
Police recorded 150 collisions with the A337 as the first road from 2021 to 2025, 42 of them fatal or serious. That is 24.4 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 1.4 a year for each mile of road.
Reported collisions by year
Down 38.2% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 26 | 8 |
| 2022 | 23 | 8 |
| 2023 | 18 | 10 |
| 2024 | 23 | 13 |
| 2025 | 17 | 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 |
|---|---|
| B3054 to Haglane Copse Hampshire · 25 collisions | 73.5 |
| B3058 to A35 Somerford Roundabout Hampshire, Bournemouth, Christchurch and Poole · 43 collisions | 23.7 |
| A31 to A35 Hampshire · 18 collisions | 22.4 |
| B3055 to B3054 Hampshire · 15 collisions | 21.4 |
| Haglane Copse, Lymington to Caird Ave Hampshire · 25 collisions | 18.4 |
| A35 to B3055 Hampshire · 14 collisions | 16.1 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 15 collisions were recorded at junctions where the A337 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 A337
In route order. Each is the highway authority DfT files the count points under.
- Hampshire
- Bournemouth, Christchurch and Poole
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 | 150 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.