A-road
A4000 traffic and collisions
The A4000 is an A-road of 4.1 miles, from Brent to Ealing. This page covers its traffic at 15 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 19m vehicle miles
- Average daily traffic 12,749 vehicles a day, both directions
- Busiest section 15,359 Steyne Rd/Horn Lane junction to A4000 Leamington Park
- HGV share 4.2% of vehicle miles
- Traffic since 2019 −11.8% same count points
- Collisions, 2021 to 2025 256 273.4 per 100m vehicle miles
How busy is the A4000?
On an average day in 2025, 12,749 vehicles passed each point on the A4000, counting both directions. The busiest section is Steyne Rd/Horn Lane junction to A4000 Leamington Park (Ealing), with 15,359 a day; the quietest listed is Old Oak Common Lane to A4000 Wales Farm Rd, with 10,813.
Busiest sections, 2025
Steyne Rd/Horn Lane junction to A4000 Leamington Park carries 1.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| Steyne Rd/Horn Lane junction to A4000 Leamington Park Ealing · 0.8 mi · HGVs 2.4% | 15,359 |
| A404 to Old Oak Common Lane Brent, Ealing · 0.6 mi · HGVs 3.0% | 12,396 |
| A406 to High St Ealing · 0.7 mi · HGVs 2.8% | 11,987 |
| Old Oak Common Lane to A4000 Wales Farm Rd Ealing · 0.6 mi · HGVs 9.7% | 10,813 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Brent to Ealing · 4.1 miles
A4000 traffic and collisions by section
9 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 5 short link roads and spurs (0.8 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A404 to Old Oak Common LaneBrent, Ealing | 12,396 | 86 |
| 2 | Old Oak Common Lane to A4000 Wales Farm RdEaling | 10,813 | 19 |
| 3 | Victoria Road to Portal WayEaling | 11,698 | 3 |
| 4 | Portal Way to A40Ealing | 17,125 | fewer than 3 |
| 5 | A40 to A4000 Horn LaneEaling | 12,001 | 13 |
| 6 | Steyne Rd/Horn Lane junction to A4000 Leamington ParkEaling | 15,359 | 47 |
| 7 | High St to Horn LaneEaling | 17,878 | 14 |
| 8 | Gunnersbury Lane to Steyne RdEaling | 14,133 | fewer than 3 |
| 9 | A406 to High StEaling | 11,987 | 48 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A4000 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.
A4000 traffic by vehicle type
Cars and taxis make up 67.5% of the vehicle miles on the A4000. HGVs account for 4.2%, rising to 9.7% on Old Oak Common Lane to A4000 Wales Farm Rd.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.4% |
| 2001 | 4.3% |
| 2002 | 4.1% |
| 2003 | 3.7% |
| 2004 | 4.1% |
| 2005 | 4.0% |
| 2006 | 3.9% |
| 2007 | 3.7% |
| 2008 | 4.3% |
| 2009 | 4.9% |
| 2010 | 4.7% |
| 2011 | 5.1% |
| 2012 | 6.0% |
| 2013 | 6.2% |
| 2014 | 5.9% |
| 2015 | 6.1% |
| 2016 | 6.4% |
| 2017 | 6.2% |
| 2018 | 4.8% |
| 2019 | 4.3% |
| 2020 | 4.8% |
| 2021 | 4.8% |
| 2022 | 4.8% |
| 2023 | 4.5% |
| 2024 | 4.5% |
| 2025 | 4.2% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4000 traffic trend
Traffic on the A4000 came to 19.1 million vehicle miles in 2025. At the count points present in both years, it is down 11.8% on 2019, before the pandemic, and up 1.2% on 2015.
Vehicle miles a year
Like for like, traffic is down 24.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 24m |
| 2001 | 24m |
| 2002 | 24m |
| 2003 | 25m |
| 2004 | 25m |
| 2005 | 24m |
| 2006 | 25m |
| 2007 | 22m |
| 2008 | 22m |
| 2009 | 19m |
| 2010 | 20m |
| 2011 | 19m |
| 2012 | 19m |
| 2013 | 19m |
| 2014 | 19m |
| 2015 | 18m |
| 2016 | 18m |
| 2017 | 18m |
| 2018 | 20m |
| 2019 | 21m |
| 2020 | 17m |
| 2021 | 18m |
| 2022 | 19m |
| 2023 | 19m |
| 2024 | 19m |
| 2025 | 19m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 17,704 |
| 2001 | 17,512 |
| 2002 | 17,737 |
| 2003 | 18,384 |
| 2004 | 18,263 |
| 2005 | 17,880 |
| 2006 | 18,146 |
| 2007 | 15,416 |
| 2008 | 15,618 |
| 2009 | 13,313 |
| 2010 | 13,812 |
| 2011 | 13,361 |
| 2012 | 13,296 |
| 2013 | 13,335 |
| 2014 | 13,377 |
| 2015 | 12,910 |
| 2016 | 12,861 |
| 2017 | 12,809 |
| 2018 | 14,005 |
| 2019 | 14,754 |
| 2020 | 11,595 |
| 2021 | 12,470 |
| 2022 | 13,016 |
| 2023 | 12,800 |
| 2024 | 12,786 |
| 2025 | 12,749 |
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 15 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4000 collisions
Police recorded 256 collisions with the A4000 as the first road from 2021 to 2025, 41 of them fatal or serious. That is 273.4 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 12.5 a year for each mile of road.
Reported collisions by year
Down 5.8% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 47 | 5 |
| 2022 | 38 | 8 |
| 2023 | 49 | 10 |
| 2024 | 37 | 13 |
| 2025 | 44 | 5 |
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 |
|---|---|
| A404 to Old Oak Common Lane Brent, Ealing · 86 collisions | 651.3 |
| A406 to High St Ealing · 48 collisions | 314.4 |
| Steyne Rd/Horn Lane junction to A4000 Leamington Park Ealing · 47 collisions | 210.1 |
| Old Oak Common Lane to A4000 Wales Farm Rd Ealing · 19 collisions | 160.6 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 76 collisions were recorded at junctions where the A4000 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 A4000
In route order. Each is the highway authority DfT files the count points under.
- Brent
- Ealing
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 | 15 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 256 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.