A-road
A402 traffic and collisions
The A402 is an A-road of 4.3 miles, from Westminster to Hammersmith and Fulham. This page covers its traffic at 7 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 34m vehicle miles
- Average daily traffic 21,700 vehicles a day, both directions
- Busiest section 24,258 A219 to A315
- HGV share 2.2% of vehicle miles
- Traffic since 2019 −18.8% same count points
- Collisions, 2021 to 2025 457 267.6 per 100m vehicle miles
How busy is the A402?
On an average day in 2025, 21,700 vehicles passed each point on the A402, counting both directions. The busiest section is A219 to A315 (Hammersmith and Fulham), with 24,258 a day; the quietest listed is Westbourne Street to Marble Arch, with 17,902.
Busiest sections, 2025
A219 to A315 carries 1.1 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A219 to A315 Hammersmith and Fulham · 1.3 mi · HGVs 1.9% | 24,258 |
| A4206 to A3220 Holland Road roundabout Kensington and Chelsea · 0.9 mi · HGVs 3.1% | 21,809 |
| Westbourne St/Lancaster Terrace to A4204 roundabout Westminster, Kensington and Chelsea · 1.0 mi · HGVs 2.2% | 18,768 |
| Westbourne Street to Marble Arch Westminster · 0.7 mi · HGVs 1.7% | 17,902 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Westminster to Hammersmith and Fulham · 4.3 miles
A402 traffic and collisions by section
6 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 | Westbourne Street to Marble ArchWestminster | 17,902 | 37 |
| 2 | Westbourne St/Lancaster Terrace to A4204 roundaboutWestminster, Kensington and Chelsea | 18,768 | 122 |
| 3 | A4204 roundabout to A4206Kensington and Chelsea | 23,272 | 15 |
| 4 | A4206 to A3220 Holland Road roundaboutKensington and Chelsea | 21,809 | 126 |
| 5 | A3220 to A219Hammersmith and Fulham | 28,400 | 48 |
| 6 | A219 to A315Hammersmith and Fulham | 24,258 | 109 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A402 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.
A402 traffic by vehicle type
Cars and taxis make up 70.9% of the vehicle miles on the A402. HGVs account for 2.2%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 3.3% |
| 2001 | 3.5% |
| 2002 | 3.2% |
| 2003 | 2.2% |
| 2004 | 2.2% |
| 2005 | 2.6% |
| 2006 | 2.5% |
| 2007 | 2.3% |
| 2008 | 2.6% |
| 2009 | 2.6% |
| 2010 | 2.4% |
| 2011 | 2.4% |
| 2012 | 2.6% |
| 2013 | 2.7% |
| 2014 | 2.5% |
| 2015 | 2.2% |
| 2016 | 2.3% |
| 2017 | 2.2% |
| 2018 | 2.0% |
| 2019 | 1.8% |
| 2020 | 2.2% |
| 2021 | 2.2% |
| 2022 | 2.3% |
| 2023 | 2.6% |
| 2024 | 2.2% |
| 2025 | 2.2% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A402 traffic trend
Traffic on the A402 came to 34.1 million vehicle miles in 2025. At the count points present in both years, it is down 18.8% on 2019, before the pandemic, and down 21.1% on 2015.
Vehicle miles a year
Like for like, traffic is down 38.9% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 56m |
| 2001 | 55m |
| 2002 | 55m |
| 2003 | 56m |
| 2004 | 53m |
| 2005 | 53m |
| 2006 | 52m |
| 2007 | 48m |
| 2008 | 47m |
| 2009 | 46m |
| 2010 | 46m |
| 2011 | 44m |
| 2012 | 42m |
| 2013 | 41m |
| 2014 | 42m |
| 2015 | 43m |
| 2016 | 43m |
| 2017 | 40m |
| 2018 | 43m |
| 2019 | 42m |
| 2020 | 30m |
| 2021 | 32m |
| 2022 | 35m |
| 2023 | 35m |
| 2024 | 35m |
| 2025 | 34m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 35,516 |
| 2001 | 35,329 |
| 2002 | 35,131 |
| 2003 | 35,404 |
| 2004 | 33,870 |
| 2005 | 33,651 |
| 2006 | 33,123 |
| 2007 | 30,604 |
| 2008 | 30,088 |
| 2009 | 29,118 |
| 2010 | 29,192 |
| 2011 | 28,246 |
| 2012 | 26,742 |
| 2013 | 26,018 |
| 2014 | 26,515 |
| 2015 | 27,510 |
| 2016 | 27,374 |
| 2017 | 25,707 |
| 2018 | 27,131 |
| 2019 | 26,711 |
| 2020 | 18,865 |
| 2021 | 20,443 |
| 2022 | 22,380 |
| 2023 | 22,260 |
| 2024 | 22,009 |
| 2025 | 21,700 |
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, 3 of the 7 count points were counted; DfT estimated the rest from earlier counts and local trends.
A402 collisions
Police recorded 457 collisions with the A402 as the first road from 2021 to 2025, 89 of them fatal or serious. That is 267.6 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 21.3 a year for each mile of road.
Reported collisions by year
Down 6.4% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 74 | 20 |
| 2022 | 84 | 17 |
| 2023 | 76 | 20 |
| 2024 | 63 | 15 |
| 2025 | 71 | 17 |
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 |
|---|---|
| A4206 to A3220 Holland Road roundabout Kensington and Chelsea · 126 collisions | 352.0 |
| Westbourne St/Lancaster Terrace to A4204 roundabout Westminster, Kensington and Chelsea · 122 collisions | 332.7 |
| A219 to A315 Hammersmith and Fulham · 109 collisions | 194.1 |
| Westbourne Street to Marble Arch Westminster · 37 collisions | 165.6 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 68 collisions were recorded at junctions where the A402 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. 100.0% of the collisions could be placed on a section. How we count collisions
Council areas on the A402
In route order. Each is the highway authority DfT files the count points under.
- Westminster
- Kensington and Chelsea
- Hammersmith and Fulham
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 | 7 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 457 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.