A-road
A3400 traffic and collisions
The A3400 is an A-road of 35.5 miles, from Oxfordshire to Solihull. This page covers its traffic at 17 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 106m vehicle miles
- Average daily traffic 8,174 vehicles a day, both directions
- Busiest section 16,829 A4390 to Oakleigh Rd
- HGV share 2.0% of vehicle miles
- Traffic since 2019 −0.6% same count points
- Collisions, 2021 to 2025 136 28.0 per 100m vehicle miles
How busy is the A3400?
On an average day in 2025, 8,174 vehicles passed each point on the A3400, counting both directions. The busiest section is A4390 to Oakleigh Rd (Warwickshire), with 16,829 a day; the quietest listed is A429 to A4390, with 5,689.
Busiest sections, 2025
A4390 to Oakleigh Rd carries 2.1 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A4390 to Oakleigh Rd Warwickshire · 0.7 mi · HGVs 1.5% | 16,829 |
| Oakleigh Rd, Stratford-on-Avon to A46 Warwickshire · 0.5 mi · HGVs 1.5% | 15,314 |
| M40 to M42 Warwickshire, Solihull · 3.4 mi · HGVs 1.0% | 10,420 |
| A4390 to A422 Warwickshire · 0.7 mi · HGVs 4.3% | 10,191 |
| A46(T) to B4089 Warwickshire · 4.7 mi · HGVs 1.5% | 9,972 |
| B4035 to A429 Warwickshire · 2.7 mi · HGVs 1.8% | 8,761 |
| B4089 to A4189 Warwickshire · 1.4 mi · HGVs 1.6% | 8,164 |
| A4189 to M40 Warwickshire · 3.8 mi · HGVs 2.0% | 7,756 |
| A44 to B4035 Oxfordshire, Warwickshire · 9.6 mi · HGVs 2.7% | 6,429 |
| A429 to A4390 Warwickshire · 7.0 mi · HGVs 2.4% | 5,689 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Oxfordshire to Solihull · 35.5 miles
A3400 traffic and collisions by section
13 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 2 short link roads and spurs (0.3 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A44 to B4035Oxfordshire, Warwickshire | 6,429 | 30 |
| 2 | B4035 to A429Warwickshire | 8,761 | 10 |
| 3 | A429 to A4390Warwickshire | 5,689 | 13 |
| 4 | A4390 to A422Warwickshire | 10,191 | fewer than 3 |
| 5 | A422 to A3400 BridgewayWarwickshire | 20,026 | 3 |
| 6 | Bridgeway to Warwick RdWarwickshire | 9,690 | fewer than 3 |
| 7 | A3400 Warwick Rd to A4390Warwickshire | 12,790 | 4 |
| 8 | A4390 to Oakleigh RdWarwickshire | 16,829 | 11 |
| 9 | Oakleigh Rd, Stratford-on-Avon to A46Warwickshire | 15,314 | 4 |
| 10 | A46(T) to B4089Warwickshire | 9,972 | 20 |
| 11 | B4089 to A4189Warwickshire | 8,164 | 6 |
| 12 | A4189 to M40Warwickshire | 7,756 | 16 |
| 13 | M40 to M42Warwickshire, Solihull | 10,420 | 13 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A3400 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.
A3400 traffic by vehicle type
Cars and taxis make up 82.5% of the vehicle miles on the A3400. HGVs account for 2.0%, rising to 4.3% on A4390 to A422.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.1% |
| 2001 | 3.1% |
| 2002 | 2.9% |
| 2003 | 2.9% |
| 2004 | 2.9% |
| 2005 | 2.6% |
| 2006 | 2.9% |
| 2007 | 2.9% |
| 2008 | 2.8% |
| 2009 | 2.6% |
| 2010 | 2.6% |
| 2011 | 2.6% |
| 2012 | 2.8% |
| 2013 | 2.8% |
| 2014 | 2.8% |
| 2015 | 3.0% |
| 2016 | 2.9% |
| 2017 | 3.1% |
| 2018 | 2.5% |
| 2019 | 2.4% |
| 2020 | 2.9% |
| 2021 | 2.8% |
| 2022 | 2.7% |
| 2023 | 2.4% |
| 2024 | 2.4% |
| 2025 | 2.0% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A3400 traffic trend
Traffic on the A3400 came to 106 million vehicle miles in 2025. At the count points present in both years, it is down 0.6% on 2019, before the pandemic, and down 5.5% on 2015.
Vehicle miles a year
Like for like, traffic is down 8.4% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 116m |
| 2001 | 110m |
| 2002 | 114m |
| 2003 | 117m |
| 2004 | 119m |
| 2005 | 113m |
| 2006 | 113m |
| 2007 | 113m |
| 2008 | 114m |
| 2009 | 113m |
| 2010 | 111m |
| 2011 | 112m |
| 2012 | 109m |
| 2013 | 108m |
| 2014 | 110m |
| 2015 | 111m |
| 2016 | 116m |
| 2017 | 117m |
| 2018 | 109m |
| 2019 | 107m |
| 2020 | 80m |
| 2021 | 88m |
| 2022 | 95m |
| 2023 | 98m |
| 2024 | 100m |
| 2025 | 106m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 8,794 |
| 2001 | 8,293 |
| 2002 | 8,607 |
| 2003 | 8,868 |
| 2004 | 8,969 |
| 2005 | 8,752 |
| 2006 | 8,779 |
| 2007 | 8,774 |
| 2008 | 8,840 |
| 2009 | 8,760 |
| 2010 | 8,641 |
| 2011 | 8,687 |
| 2012 | 8,428 |
| 2013 | 8,360 |
| 2014 | 8,549 |
| 2015 | 8,637 |
| 2016 | 8,976 |
| 2017 | 9,085 |
| 2018 | 8,399 |
| 2019 | 8,222 |
| 2020 | 6,187 |
| 2021 | 6,804 |
| 2022 | 7,326 |
| 2023 | 7,543 |
| 2024 | 7,708 |
| 2025 | 8,174 |
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, 3 of the 17 count points were counted; DfT estimated the rest from earlier counts and local trends.
A3400 collisions
Police recorded 136 collisions with the A3400 as the first road from 2021 to 2025, 35 of them fatal or serious, including 3 fatal. That is 28.0 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.8 a year for each mile of road.
Reported collisions by year
Up 26.1% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 18 | 5 |
| 2022 | 18 | 6 |
| 2023 | 26 | 4 |
| 2024 | 20 | 10 |
| 2025 | 20 | 9 |
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 |
|---|---|
| A4390 to Oakleigh Rd Warwickshire · 11 collisions | 52.8 |
| A44 to B4035 Oxfordshire, Warwickshire · 30 collisions | 35.5 |
| A4189 to M40 Warwickshire · 16 collisions | 31.0 |
| B4035 to A429 Warwickshire · 10 collisions | 25.0 |
| A46(T) to B4089 Warwickshire · 20 collisions | 24.3 |
| M40 to M42 Warwickshire, Solihull · 13 collisions | 20.1 |
| A429 to A4390 Warwickshire · 13 collisions | 18.6 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 13 collisions were recorded at junctions where the A3400 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 A3400
In route order. Each is the highway authority DfT files the count points under.
- Oxfordshire
- Warwickshire
- Solihull
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 | 17 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 136 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.