A-road
A342 traffic and collisions
The A342 is an A-road of 32.5 miles, from Hampshire to Wiltshire. This page covers its traffic at 16 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 84m vehicle miles
- Average daily traffic 7,103 vehicles a day, both directions
- Busiest section 15,299 A303/A343 roundabout to Amesbury Rd
- HGV share 2.7% of vehicle miles
- Traffic since 2019 −3.7% same count points
- Collisions, 2021 to 2025 131 32.4 per 100m vehicle miles
How busy is the A342?
On an average day in 2025, 7,103 vehicles passed each point on the A342, counting both directions. The busiest section is A303/A343 roundabout to Amesbury Rd (Hampshire), with 15,299 a day; the quietest listed is A346 to A338, with 2,987.
Busiest sections, 2025
A303/A343 roundabout to Amesbury Rd carries 2.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A303/A343 roundabout to Amesbury Rd Hampshire · 1.7 mi · HGVs 2.5% | 15,299 |
| Amesbury Rd to A3026 Hampshire, Wiltshire · 4.2 mi · HGVs 2.0% | 11,196 |
| Marshall Road roundabout to A360 Wiltshire · 0.9 mi · HGVs 2.4% | 10,498 |
| B3098 to Marshall Road roundabout, Devizes Wiltshire · 3.4 mi · HGVs 3.2% | 8,797 |
| A4 to A3102 Wiltshire · 2.9 mi · HGVs 2.3% | 7,873 |
| A3026 to A346 Wiltshire · 1.1 mi · HGVs 5.0% | 6,321 |
| A361 to A3102 Wiltshire · 4.0 mi · HGVs 2.1% | 6,173 |
| Pewsey Rd/Church Lane Junction to B3098 Wiltshire · 4.3 mi · HGVs 3.8% | 6,031 |
| A345 to Pewsey Rd/Church Lane Wiltshire · 0.6 mi · HGVs 3.6% | 4,416 |
| A338 to A345 Wiltshire · 7.5 mi · HGVs 2.7% | 3,120 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Hampshire to Wiltshire · 32.5 miles
A342 traffic and collisions by section
15 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 | A303/A343 roundabout to Amesbury RdHampshire | 15,299 | 12 |
| 2 | Amesbury Rd to A3026Hampshire, Wiltshire | 11,196 | 23 |
| 3 | A3026 to A346Wiltshire | 6,321 | fewer than 3 |
| 4 | A346 to A338Wiltshire | 2,987 | fewer than 3 |
| 5 | A338 to A345Wiltshire | 3,120 | 8 |
| 6 | A345 West to A345 EastWiltshire | 4,089 | 0 |
| 7 | At A345Wiltshire | 2,658 | fewer than 3 |
| 8 | A345 to Pewsey Rd/Church LaneWiltshire | 4,416 | 0 |
| 9 | Pewsey Rd/Church Lane Junction to B3098Wiltshire | 6,031 | 18 |
| 10 | B3098 to Marshall Road roundabout, DevizesWiltshire | 8,797 | 13 |
| 11 | Marshall Road roundabout to A360Wiltshire | 10,498 | 6 |
| 12 | A360 to A361Wiltshire | 20,023 | fewer than 3 |
| 13 | A361 to A3102Wiltshire | 6,173 | 22 |
| 14 | A3102 North to A3102 SouthWiltshire | 14,407 | fewer than 3 |
| 15 | A4 to A3102Wiltshire | 7,873 | 21 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A342 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.
A342 traffic by vehicle type
Cars and taxis make up 79.3% of the vehicle miles on the A342. HGVs account for 2.7%, rising to 5.0% on A3026 to A346.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 5.5% |
| 2001 | 5.2% |
| 2002 | 5.0% |
| 2003 | 4.7% |
| 2004 | 4.8% |
| 2005 | 4.4% |
| 2006 | 4.4% |
| 2007 | 4.8% |
| 2008 | 4.4% |
| 2009 | 4.1% |
| 2010 | 4.2% |
| 2011 | 4.0% |
| 2012 | 4.1% |
| 2013 | 3.9% |
| 2014 | 4.0% |
| 2015 | 3.7% |
| 2016 | 3.4% |
| 2017 | 3.5% |
| 2018 | 3.5% |
| 2019 | 3.4% |
| 2020 | 4.0% |
| 2021 | 3.9% |
| 2022 | 3.5% |
| 2023 | 3.2% |
| 2024 | 2.7% |
| 2025 | 2.7% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A342 traffic trend
Traffic on the A342 came to 84.3 million vehicle miles in 2025. At the count points present in both years, it is down 3.7% on 2019, before the pandemic, and up 2.3% on 2015.
Vehicle miles a year
Like for like, traffic is up 10.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 76m |
| 2001 | 77m |
| 2002 | 79m |
| 2003 | 79m |
| 2004 | 81m |
| 2005 | 82m |
| 2006 | 84m |
| 2007 | 80m |
| 2008 | 78m |
| 2009 | 78m |
| 2010 | 77m |
| 2011 | 78m |
| 2012 | 77m |
| 2013 | 78m |
| 2014 | 80m |
| 2015 | 82m |
| 2016 | 85m |
| 2017 | 86m |
| 2018 | 86m |
| 2019 | 88m |
| 2020 | 66m |
| 2021 | 74m |
| 2022 | 81m |
| 2023 | 83m |
| 2024 | 83m |
| 2025 | 84m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 6,444 |
| 2001 | 6,498 |
| 2002 | 6,682 |
| 2003 | 6,712 |
| 2004 | 6,809 |
| 2005 | 6,971 |
| 2006 | 7,092 |
| 2007 | 6,752 |
| 2008 | 6,584 |
| 2009 | 6,570 |
| 2010 | 6,506 |
| 2011 | 6,580 |
| 2012 | 6,499 |
| 2013 | 6,590 |
| 2014 | 6,775 |
| 2015 | 6,942 |
| 2016 | 7,189 |
| 2017 | 7,260 |
| 2018 | 7,289 |
| 2019 | 7,372 |
| 2020 | 5,586 |
| 2021 | 6,202 |
| 2022 | 6,822 |
| 2023 | 6,986 |
| 2024 | 7,027 |
| 2025 | 7,103 |
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 16 count points were counted; DfT estimated the rest from earlier counts and local trends.
A342 collisions
Police recorded 131 collisions with the A342 as the first road from 2021 to 2025, 39 of them fatal or serious. That is 32.4 per 100 million vehicle miles, close to 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 8.7% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 16 | 7 |
| 2022 | 19 | 8 |
| 2023 | 26 | 5 |
| 2024 | 12 | 13 |
| 2025 | 18 | 7 |
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 |
|---|---|
| A4 to A3102 Wiltshire · 21 collisions | 52.5 |
| A361 to A3102 Wiltshire · 22 collisions | 45.4 |
| Pewsey Rd/Church Lane Junction to B3098 Wiltshire · 18 collisions | 39.2 |
| Amesbury Rd to A3026 Hampshire, Wiltshire · 23 collisions | 29.7 |
| A303/A343 roundabout to Amesbury Rd Hampshire · 12 collisions | 26.9 |
| B3098 to Marshall Road roundabout, Devizes Wiltshire · 13 collisions | 25.5 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 21 collisions were recorded at junctions where the A342 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 A342
In route order. Each is the highway authority DfT files the count points under.
- Hampshire
- Wiltshire
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 | 131 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.