Trunk A-road
A45 traffic and collisions
The A45 is a trunk A-road of 74.0 miles, from North Northamptonshire to Birmingham. This page covers its traffic at 44 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 1.0bn vehicle miles
- Average daily traffic 37,564 vehicles a day, both directions
- Busiest section 99,419 A43 to A428/A5095
- HGV share 6.6% of vehicle miles
- Traffic since 2019 −5.7% same count points
- Collisions, 2021 to 2025 728 15.3 per 100m vehicle miles
How busy is the A45?
On an average day in 2025, 37,564 vehicles passed each point on the A45, counting both directions. The busiest section is A43 to A428/A5095 (West Northamptonshire), with 99,419 a day; the quietest listed is A425 to A361, with 8,656.
Busiest sections, 2025
A43 to A428/A5095 carries 2.6 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A43 to A428/A5095 West Northamptonshire · 1.7 mi · HGVs 5.4% | 99,419 |
| A508/A5076 to A428/AA5095 West Northamptonshire · 1.6 mi · HGVs 6.7% | 87,779 |
| A46 to A444 Coventry · 2.7 mi · HGVs 7.1% | 81,157 |
| A5076 to A43 West Northamptonshire · 1.2 mi · HGVs 5.8% | 70,321 |
| A45/A5076 to London Road slips (mid-junction) West Northamptonshire · 0.9 mi · HGVs 8.3% | 67,807 |
| London Road slips (mid-junction) to M1 West Northamptonshire · 1.2 mi · HGVs 8.7% | 59,523 |
| A509 to A5076 North Northamptonshire, West Northamptonshire · 6.2 mi · HGVs 6.4% | 55,027 |
| B573 to A509 North Northamptonshire · 0.7 mi · HGVs 5.7% | 54,342 |
| A45 spur to A5001 to A509 North Northamptonshire · 2.1 mi · HGVs 5.1% | 52,497 |
| A509 to B573 North Northamptonshire · 0.5 mi · HGVs 5.5% | 50,557 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
North Northamptonshire to Birmingham · 74.0 miles
A45 traffic and collisions by section
35 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 2 short link roads and spurs (0.2 miles) count in the road’s totals but are not listed.
Show all 35 sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A6(T) to A14(T)North Northamptonshire | 28,364 | 43 |
| 2 | A6 to A5028North Northamptonshire | 38,451 | 19 |
| 3 | A5028 to A45 spur to A5001North Northamptonshire | 38,565 | 9 |
| 4 | A45 spur to A5001 to A509North Northamptonshire | 52,497 | 15 |
| 5 | A509 to B573North Northamptonshire | 50,557 | 10 |
| 6 | B573 to A509North Northamptonshire | 54,342 | 6 |
| 7 | A509 to A5076North Northamptonshire, West Northamptonshire | 55,027 | 49 |
| 8 | A5076 to A43West Northamptonshire | 70,321 | 10 |
| 9 | A43 to A428/A5095West Northamptonshire | 99,419 | 36 |
| 10 | A508/A5076 to A428/AA5095West Northamptonshire | 87,779 | 45 |
| 11 | A45/A5076 to London Road slips (mid-junction)West Northamptonshire | 67,807 | 13 |
| 12 | London Road slips (mid-junction) to M1West Northamptonshire | 59,523 | 20 |
| 13 | M1 Junction 16 to Roundabout where A5/A45 meet, North of Weedon Bec, NorthamptonshireWest Northamptonshire | 11,043 | 23 |
| 14 | Roundabout where A5/A45 meet, North of Weedon Bec, Northamptonshire to Roundabout where A45 London Road, B4038 and A45 Stefen Way meetWest Northamptonshire | 17,612 | 27 |
| 15 | A361 to A425West Northamptonshire | 11,677 | 4 |
| 16 | A425 to A361West Northamptonshire | 8,656 | fewer than 3 |
| 17 | Roundabout A45 Stefen Way/Browns Road to A4256/A45 Braunston Road JunctionWest Northamptonshire | 9,195 | fewer than 3 |
| 18 | A425 to A361West Northamptonshire | 15,087 | 0 |
| 19 | A361 to M45West Northamptonshire, Warwickshire | 10,102 | 20 |
| 20 | M45 to A4071Warwickshire | 27,791 | 8 |
| 21 | A4071 to A445Warwickshire | 33,927 | 17 |
| 22 | A445 to A423(T)Warwickshire | 31,182 | 8 |
| 23 | A423 to A46Warwickshire, Coventry | 44,012 | 5 |
| 24 | A46 to A444Coventry | 81,157 | 30 |
| 25 | A444 to A429Coventry | 28,629 | 3 |
| 26 | A429 to A444Coventry | 31,537 | 13 |
| 27 | A429 to B4101Coventry | 42,201 | 19 |
| 28 | B4101 to A4114Coventry | 25,753 | 23 |
| 29 | A4114 to B4102Coventry, Solihull, Warwickshire | 29,869 | 16 |
| 30 | B4102 to A452Solihull, Warwickshire | 37,093 | 6 |
| 31 | A452 to M42Solihull | 43,889 | 4 |
| 32 | M42 to B4438Solihull | 47,624 | 12 |
| 33 | B4438 to Council boundarySolihull | 39,486 | 15 |
| 34 | A4540Birmingham | 43,620 | 84 |
| 35 | A4540 to A4040Birmingham | 34,680 | 111 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A45 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.
A45 traffic by vehicle type
Cars and taxis make up 78.1% of the vehicle miles on the A45. HGVs account for 6.6%, rising to 10.5% on M45 to A4071.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 7.0% |
| 2001 | 6.9% |
| 2002 | 7.1% |
| 2003 | 7.3% |
| 2004 | 7.9% |
| 2005 | 7.4% |
| 2006 | 7.1% |
| 2007 | 7.0% |
| 2008 | 6.9% |
| 2009 | 6.3% |
| 2010 | 6.2% |
| 2011 | 6.3% |
| 2012 | 6.4% |
| 2013 | 6.3% |
| 2014 | 6.4% |
| 2015 | 6.6% |
| 2016 | 6.4% |
| 2017 | 6.7% |
| 2018 | 6.5% |
| 2019 | 6.5% |
| 2020 | 8.3% |
| 2021 | 8.6% |
| 2022 | 7.7% |
| 2023 | 7.3% |
| 2024 | 7.0% |
| 2025 | 6.6% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A45 traffic trend
Traffic on the A45 came to 1.01 billion vehicle miles in 2025. At the count points present in both years, it is down 5.7% on 2019, before the pandemic, and up 2.9% on 2015.
Vehicle miles a year
Like for like, traffic is up 27.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 815m |
| 2001 | 843m |
| 2002 | 915m |
| 2003 | 933m |
| 2004 | 973m |
| 2005 | 927m |
| 2006 | 930m |
| 2007 | 938m |
| 2008 | 899m |
| 2009 | 907m |
| 2010 | 891m |
| 2011 | 891m |
| 2012 | 896m |
| 2013 | 895m |
| 2014 | 924m |
| 2015 | 962m |
| 2016 | 982m |
| 2017 | 1.0bn |
| 2018 | 1.0bn |
| 2019 | 1.0bn |
| 2020 | 758m |
| 2021 | 837m |
| 2022 | 937m |
| 2023 | 966m |
| 2024 | 1.0bn |
| 2025 | 1.0bn |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 30,127 |
| 2001 | 31,158 |
| 2002 | 33,575 |
| 2003 | 34,201 |
| 2004 | 35,699 |
| 2005 | 33,986 |
| 2006 | 34,116 |
| 2007 | 34,389 |
| 2008 | 33,069 |
| 2009 | 33,366 |
| 2010 | 32,776 |
| 2011 | 32,617 |
| 2012 | 32,801 |
| 2013 | 33,090 |
| 2014 | 34,170 |
| 2015 | 35,382 |
| 2016 | 36,362 |
| 2017 | 36,591 |
| 2018 | 37,017 |
| 2019 | 38,586 |
| 2020 | 28,949 |
| 2021 | 31,173 |
| 2022 | 34,965 |
| 2023 | 36,054 |
| 2024 | 37,485 |
| 2025 | 37,564 |
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 (67.8% of today’s road for 2019). In 2025, 19 of the 44 count points were counted; DfT estimated the rest from earlier counts and local trends.
A45 collisions
Police recorded 728 collisions with the A45 as the first road from 2021 to 2025, 146 of them fatal or serious, including 28 fatal. That is 15.3 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 2.0 a year for each mile of road.
Reported collisions by year
Up 31.9% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 97 | 19 |
| 2022 | 127 | 22 |
| 2023 | 118 | 32 |
| 2024 | 123 | 37 |
| 2025 | 116 | 37 |
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 |
|---|---|
| A4540 to A4040 Birmingham · 111 collisions | 250.5 |
| B4101 to A4114 Coventry · 23 collisions | 143.9 |
| A429 to A444 Coventry · 13 collisions | 80.7 |
| A429 to B4101 Coventry · 19 collisions | 68.5 |
| A4540 Birmingham · 84 collisions | 38.9 |
| M1 Junction 16 to Roundabout where A5/A45 meet, North of Weedon Bec, Northamptonshire West Northamptonshire · 23 collisions | 32.9 |
| Roundabout where A5/A45 meet, North of Weedon Bec, Northamptonshire to Roundabout where A45 London Road, B4038 and A45 Stefen Way meet West Northamptonshire · 27 collisions | 24.9 |
| A509 to B573 North Northamptonshire · 10 collisions | 22.3 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 134 collisions were recorded at junctions where the A45 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 A45
In route order. Each is the highway authority DfT files the count points under.
- North Northamptonshire
- West Northamptonshire
- Warwickshire
- Coventry
- Solihull
- Birmingham
Planned closures on the A45 in England
National Highways has 22 planned closures on the A45 between 16 September 2026 and 30 September 2026, 17 of them starting in that period. 4 close a carriageway rather than a lane or slip road, and 16 start between 7pm and 6am.
-
Carriageway A45 northbound Wellingborough entry slip road closure
-
Lane or slip Lane closure northbound
-
Lane or slip Entry slip road lane closure northbound
-
Lane or slip Exit slip road lane closure northbound
-
Carriageway A45 southbound Wellingborough exit slip road closure
-
Carriageway A45 southbound Barnes Meadow mini exit slip road closure
-
Lane or slip Lane 2,3 closure southbound
-
Lane or slip Lane closure southbound
14 more planned closures in this period are not shown.
Planned closures only: National Highways can cancel or change them, and closures caused by incidents are not shown. Council roads in England are not covered. Roadworks and closures across the UK
Source:National Highways 2026-09-16 to 2026-09-30 Updated
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 | 44 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 728 reported collisions | 15 September 2026 |
| Planned closures | Transport Data Feeds (DATEX II) National Highways | 2026-09-16 to 2026-09-30 | 2,304 planned closure schemes | 16 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.
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