Trunk A-road
A427 traffic and collisions
The A427 is a trunk A-road of 22.0 miles, in North Northamptonshire. This page covers its traffic at 9 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 65m vehicle miles
- Average daily traffic 8,026 vehicles a day, both directions
- Busiest section 28,479 A6086 to A6014
- HGV share 4.4% of vehicle miles
- Traffic since 2019 +4.0% same count points
- Collisions, 2021 to 2025 82 27.8 per 100m vehicle miles
How busy is the A427?
On an average day in 2025, 8,026 vehicles passed each point on the A427, counting both directions. The busiest section is A6086 to A6014 (North Northamptonshire), with 28,479 a day; the quietest listed is Stoke Hill/Mill Road roundabout to Church St, Weldon, with 2,435.
Busiest sections, 2025
A6086 to A6014 carries 3.5 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A6086 to A6014 North Northamptonshire · 1.1 mi · HGVs 0.9% | 28,479 |
| A43 to A6086 North Northamptonshire · 1.2 mi · HGVs 2.3% | 14,529 |
| A427 to A47 WALDEN North Northamptonshire · 0.9 mi · HGVs 14.5% | 12,715 |
| A6014 to A6003 North Northamptonshire · 1.7 mi · HGVs 1.6% | 12,579 |
| A6003 to A6/A4304 North Northamptonshire · 7.6 mi · HGVs 5.7% | 8,078 |
| A605 to Stoke Hill/Mill Road roundabout North Northamptonshire · 1.0 mi · HGVs 1.4% | 4,786 |
| Church St, Weldon to A43 North Northamptonshire · 0.5 mi · HGVs 2.8% | 2,703 |
| Stoke Hill/Mill Road roundabout to Church St, Weldon North Northamptonshire · 7.6 mi · HGVs 2.8% | 2,435 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
In North Northamptonshire · 22.0 miles
A427 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 | A605 to Stoke Hill/Mill Road roundaboutNorth Northamptonshire | 4,786 | fewer than 3 |
| 2 | Stoke Hill/Mill Road roundabout to Church St, WeldonNorth Northamptonshire | 2,435 | 8 |
| 3 | Church St, Weldon to A43North Northamptonshire | 2,703 | fewer than 3 |
| 4 | A427 to A47 WALDENNorth Northamptonshire | 12,715 | fewer than 3 |
| 5 | A43(T) to A6116North Northamptonshire | 22,388 | 3 |
| 6 | A43 to A6086North Northamptonshire | 14,529 | 9 |
| 7 | A6086 to A6014North Northamptonshire | 28,479 | 23 |
| 8 | A6014 to A6003North Northamptonshire | 12,579 | 24 |
| 9 | A6003 to A6/A4304North Northamptonshire | 8,078 | 11 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A427 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.
A427 traffic by vehicle type
Cars and taxis make up 81.1% of the vehicle miles on the A427. HGVs account for 4.4%, rising to 14.5% on A427 to A47 WALDEN.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 7.6% |
| 2001 | 6.7% |
| 2002 | 6.6% |
| 2003 | 6.3% |
| 2004 | 6.7% |
| 2005 | 7.5% |
| 2006 | 7.4% |
| 2007 | 7.1% |
| 2008 | 6.6% |
| 2009 | 5.9% |
| 2010 | 5.5% |
| 2011 | 5.6% |
| 2012 | 5.6% |
| 2013 | 5.8% |
| 2014 | 5.7% |
| 2015 | 5.5% |
| 2016 | 5.3% |
| 2017 | 5.3% |
| 2018 | 4.5% |
| 2019 | 4.4% |
| 2020 | 5.2% |
| 2021 | 5.1% |
| 2022 | 5.1% |
| 2023 | 4.7% |
| 2024 | 4.4% |
| 2025 | 4.4% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A427 traffic trend
Traffic on the A427 came to 64.5 million vehicle miles in 2025. At the count points present in both years, it is up 4.0% on 2019, before the pandemic, and up 15.3% on 2015.
Vehicle miles a year
Like for like, traffic is up 40.8% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 45m |
| 2001 | 48m |
| 2002 | 49m |
| 2003 | 49m |
| 2004 | 50m |
| 2005 | 51m |
| 2006 | 51m |
| 2007 | 54m |
| 2008 | 51m |
| 2009 | 51m |
| 2010 | 51m |
| 2011 | 52m |
| 2012 | 51m |
| 2013 | 51m |
| 2014 | 52m |
| 2015 | 53m |
| 2016 | 53m |
| 2017 | 53m |
| 2018 | 61m |
| 2019 | 62m |
| 2020 | 47m |
| 2021 | 52m |
| 2022 | 57m |
| 2023 | 60m |
| 2024 | 63m |
| 2025 | 65m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 5,855 |
| 2001 | 6,263 |
| 2002 | 6,446 |
| 2003 | 6,436 |
| 2004 | 6,467 |
| 2005 | 6,697 |
| 2006 | 6,648 |
| 2007 | 7,015 |
| 2008 | 6,641 |
| 2009 | 6,643 |
| 2010 | 6,654 |
| 2011 | 6,727 |
| 2012 | 6,637 |
| 2013 | 6,640 |
| 2014 | 6,795 |
| 2015 | 6,934 |
| 2016 | 6,907 |
| 2017 | 6,962 |
| 2018 | 7,706 |
| 2019 | 7,714 |
| 2020 | 5,871 |
| 2021 | 6,458 |
| 2022 | 7,042 |
| 2023 | 7,478 |
| 2024 | 7,785 |
| 2025 | 8,026 |
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 9 count points were counted; DfT estimated the rest from earlier counts and local trends.
A427 collisions
Police recorded 82 collisions with the A427 as the first road from 2021 to 2025, 18 of them fatal or serious. That is 27.8 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
Down 26.3% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 19 |
| 2022 | 20 |
| 2023 | 14 |
| 2024 | 15 |
| 2025 | 14 |
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 |
|---|---|
| A6014 to A6003 North Northamptonshire · 24 collisions | 63.4 |
| A6086 to A6014 North Northamptonshire · 23 collisions | 44.1 |
| A6003 to A6/A4304 North Northamptonshire · 11 collisions | 10.2 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 30 collisions were recorded at junctions where the A427 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 A427
In route order. Each is the highway authority DfT files the count points under.
- North 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 | 9 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 82 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.