A-road
A413 traffic and collisions
The A413 is an A-road of 51.0 miles, from Buckinghamshire to West Northamptonshire. This page covers its traffic at 17 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 252m vehicle miles
- Average daily traffic 13,552 vehicles a day, both directions
- Busiest section 29,377 A355 to A404
- HGV share 2.8% of vehicle miles
- Traffic since 2019 −1.9% same count points
- Collisions, 2021 to 2025 218 18.1 per 100m vehicle miles
How busy is the A413?
On an average day in 2025, 13,552 vehicles passed each point on the A413, counting both directions. The busiest section is A355 to A404 (Buckinghamshire), with 29,377 a day; the quietest listed is Main Street to A43, with 2,966.
Busiest sections, 2025
A355 to A404 carries 2.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A355 to A404 Buckinghamshire · 0.5 mi · HGVs 3.0% | 29,377 |
| A4010 to Walton St/Wendover Rd Buckinghamshire · 1.9 mi · HGVs 2.6% | 23,588 |
| A404 to A4128 Buckinghamshire · 5.2 mi · HGVs 3.5% | 20,574 |
| Just east of Great Missenden Rail Station to A4010 Station Road Buckinghamshire · 7.3 mi · HGVs 4.7% | 18,129 |
| Junction A4157/A413 to Roundabout A413/A4199 Buckinghamshire · 0.7 mi · HGVs 2.9% | 18,007 |
| A40 to B416 Buckinghamshire · 2.4 mi · HGVs 3.0% | 17,775 |
| B416 to Cherry Acre, Chalfont Buckinghamshire · 1.5 mi · HGVs 1.3% | 17,491 |
| A404 to A355 Buckinghamshire · 0.5 mi · HGVs 3.2% | 15,918 |
| Cherry Acre, Chalfont to A404 Buckinghamshire · 3.5 mi · HGVs 1.8% | 15,648 |
| A421 to A422 Buckinghamshire · 0.7 mi · HGVs 3.6% | 13,711 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Buckinghamshire to West Northamptonshire · 51.0 miles
A413 traffic and collisions by section
16 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length.
Show all 16 sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A40 to B416Buckinghamshire | 17,775 | 10 |
| 2 | B416 to Cherry Acre, ChalfontBuckinghamshire | 17,491 | 11 |
| 3 | Cherry Acre, Chalfont to A404Buckinghamshire | 15,648 | 10 |
| 4 | A404 to A355Buckinghamshire | 15,918 | 5 |
| 5 | A355 to A404Buckinghamshire | 29,377 | fewer than 3 |
| 6 | A404 to A4128Buckinghamshire | 20,574 | 16 |
| 7 | Just east of Great Missenden Rail Station to A4010 Station RoadBuckinghamshire | 18,129 | 22 |
| 8 | A4010 to Walton St/Wendover RdBuckinghamshire | 23,588 | 33 |
| 9 | Wendover Rd to A41(T)Buckinghamshire | 27,877 | 7 |
| 10 | A41(T) to A4157Buckinghamshire | 10,144 | 34 |
| 11 | Junction A4157/A413 to Roundabout A413/A4199Buckinghamshire | 18,007 | 5 |
| 12 | Roundabout A413/A4199 to Roundabout A421/A413Buckinghamshire | 11,912 | 32 |
| 13 | A421 to A422Buckinghamshire | 13,711 | 3 |
| 14 | A422 to Main StreetBuckinghamshire | 6,309 | fewer than 3 |
| 15 | Main Street to A43Buckinghamshire, West Northamptonshire | 2,966 | 6 |
| 16 | Junction where A43 and A413 (slip road) meet, near Hazelborough Wood, Northamptonshire to Junction where A43 and A413 meet (Just East of Silverstone Fields Farm)West Northamptonshire | 7,976 | 3 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A413 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.
A413 traffic by vehicle type
Cars and taxis make up 82.1% of the vehicle miles on the A413. HGVs account for 2.8%, rising to 4.7% on Just east of Great Missenden Rail Station to A4010 Station Road.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.1% |
| 2001 | 2.8% |
| 2002 | 3.1% |
| 2003 | 3.2% |
| 2004 | 3.2% |
| 2005 | 3.0% |
| 2006 | 2.9% |
| 2007 | 3.4% |
| 2008 | 2.6% |
| 2009 | 2.4% |
| 2010 | 2.3% |
| 2011 | 2.4% |
| 2012 | 2.3% |
| 2013 | 2.4% |
| 2014 | 2.3% |
| 2015 | 2.3% |
| 2016 | 2.3% |
| 2017 | 2.2% |
| 2018 | 2.1% |
| 2019 | 2.2% |
| 2020 | 2.5% |
| 2021 | 2.6% |
| 2022 | 2.9% |
| 2023 | 3.2% |
| 2024 | 2.9% |
| 2025 | 2.8% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A413 traffic trend
Traffic on the A413 came to 252 million vehicle miles in 2025. At the count points present in both years, it is down 1.9% on 2019, before the pandemic, and down 6.9% on 2015.
Vehicle miles a year
Like for like, traffic is down 5.4% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 228m |
| 2001 | 242m |
| 2002 | 239m |
| 2003 | 237m |
| 2004 | 233m |
| 2005 | 237m |
| 2006 | 233m |
| 2007 | 235m |
| 2008 | 239m |
| 2009 | 236m |
| 2010 | 228m |
| 2011 | 231m |
| 2012 | 222m |
| 2013 | 225m |
| 2014 | 231m |
| 2015 | 237m |
| 2016 | 239m |
| 2017 | 239m |
| 2018 | 240m |
| 2019 | 243m |
| 2020 | 192m |
| 2021 | 211m |
| 2022 | 242m |
| 2023 | 249m |
| 2024 | 251m |
| 2025 | 252m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 13,073 |
| 2001 | 13,880 |
| 2002 | 13,698 |
| 2003 | 13,620 |
| 2004 | 13,363 |
| 2005 | 13,707 |
| 2006 | 13,493 |
| 2007 | 13,609 |
| 2008 | 13,698 |
| 2009 | 13,543 |
| 2010 | 13,112 |
| 2011 | 13,256 |
| 2012 | 12,751 |
| 2013 | 12,917 |
| 2014 | 13,238 |
| 2015 | 13,603 |
| 2016 | 13,753 |
| 2017 | 13,752 |
| 2018 | 13,779 |
| 2019 | 13,169 |
| 2020 | 10,354 |
| 2021 | 11,356 |
| 2022 | 12,980 |
| 2023 | 13,379 |
| 2024 | 13,466 |
| 2025 | 13,552 |
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 (55.9% of today’s road for 2019). In 2025, 1 of the 17 count points were counted; DfT estimated the rest from earlier counts and local trends.
A413 collisions
Police recorded 218 collisions with the A413 as the first road from 2021 to 2025, 51 of them fatal or serious, including 7 fatal. That is 18.1 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.9 a year for each mile of road.
Reported collisions by year
Down 21.7% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 33 | 13 |
| 2022 | 36 | 9 |
| 2023 | 38 | 9 |
| 2024 | 30 | 14 |
| 2025 | 30 | 6 |
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 |
|---|---|
| A41(T) to A4157 Buckinghamshire · 34 collisions | 379.1 |
| A4010 to Walton St/Wendover Rd Buckinghamshire · 33 collisions | 41.6 |
| B416 to Cherry Acre, Chalfont Buckinghamshire · 11 collisions | 23.7 |
| Roundabout A413/A4199 to Roundabout A421/A413 Buckinghamshire · 32 collisions | 17.0 |
| A40 to B416 Buckinghamshire · 10 collisions | 13.4 |
| Just east of Great Missenden Rail Station to A4010 Station Road Buckinghamshire · 22 collisions | 11.7 |
| Cherry Acre, Chalfont to A404 Buckinghamshire · 10 collisions | 10.0 |
| A404 to A4128 Buckinghamshire · 16 collisions | 8.5 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 14 collisions were recorded at junctions where the A413 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 A413
In route order. Each is the highway authority DfT files the count points under.
- Buckinghamshire
- West Northamptonshire
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 | 218 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.