A-road
A332 traffic and collisions
The A332 is an A-road of 11.8 miles, from Slough to Bracknell Forest. This page covers its traffic at 15 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 94m vehicle miles
- Average daily traffic 21,834 vehicles a day, both directions
- Busiest section 62,649 A355 to A308
- HGV share 1.9% of vehicle miles
- Traffic since 2019 +6.5% same count points
- Collisions, 2021 to 2025 77 18.2 per 100m vehicle miles
How busy is the A332?
On an average day in 2025, 21,834 vehicles passed each point on the A332, counting both directions. The busiest section is A355 to A308 (Windsor and Maidenhead), with 62,649 a day; the quietest listed is A329 to B3017, with 10,622.
Busiest sections, 2025
A355 to A308 carries 2.9 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A355 to A308 Windsor and Maidenhead · 1.1 mi · HGVs 1.3% | 62,649 |
| Queens Acre, Windsor to A330 Windsor and Maidenhead, Bracknell Forest · 4.6 mi · HGVs 1.8% | 18,264 |
| B3017 to A322 Bracknell Forest · 1.8 mi · HGVs 2.9% | 17,606 |
| B3022 to A355 Slough, Windsor and Maidenhead · 0.9 mi · HGVs 1.9% | 16,977 |
| A330 to A329 Windsor and Maidenhead · 1.1 mi · HGVs 2.4% | 16,103 |
| A329 to B3017 Windsor and Maidenhead, Bracknell Forest · 1.0 mi · HGVs 3.1% | 10,622 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Slough to Bracknell Forest · 11.8 miles
A332 traffic and collisions by section
11 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 | A4 to A412Slough | 11,373 | 7 |
| 2 | A412 to B3027 Ragstone RdSlough | 16,369 | 12 |
| 3 | B3027 Ragstone Rd to B3022Slough | 17,351 | 0 |
| 4 | B3022 to A355Slough, Windsor and Maidenhead | 16,977 | 3 |
| 5 | A355 to A308Windsor and Maidenhead | 62,649 | 10 |
| 6 | A308 to B3024/B3175 roundaboutWindsor and Maidenhead | 44,122 | 6 |
| 7 | Queens Acre to A308Windsor and Maidenhead | 20,032 | fewer than 3 |
| 8 | Queens Acre, Windsor to A330Windsor and Maidenhead, Bracknell Forest | 18,264 | 15 |
| 9 | A330 to A329Windsor and Maidenhead | 16,103 | 7 |
| 10 | A329 to B3017Windsor and Maidenhead, Bracknell Forest | 10,622 | 7 |
| 11 | B3017 to A322Bracknell Forest | 17,606 | 4 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A332 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.
A332 traffic by vehicle type
Cars and taxis make up 85.1% of the vehicle miles on the A332. HGVs account for 1.9%, rising to 3.1% on A329 to B3017.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 2.9% |
| 2001 | 3.1% |
| 2002 | 2.1% |
| 2003 | 2.0% |
| 2004 | 2.2% |
| 2005 | 2.1% |
| 2006 | 2.1% |
| 2007 | 2.0% |
| 2008 | 2.0% |
| 2009 | 2.2% |
| 2010 | 2.2% |
| 2011 | 1.9% |
| 2012 | 1.8% |
| 2013 | 1.7% |
| 2014 | 1.9% |
| 2015 | 1.9% |
| 2016 | 1.6% |
| 2017 | 1.7% |
| 2018 | 1.7% |
| 2019 | 1.6% |
| 2020 | 2.5% |
| 2021 | 2.3% |
| 2022 | 2.3% |
| 2023 | 2.2% |
| 2024 | 2.0% |
| 2025 | 1.9% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A332 traffic trend
Traffic on the A332 came to 94 million vehicle miles in 2025. At the count points present in both years, it is up 6.5% on 2019, before the pandemic, and up 3.2% on 2015.
Vehicle miles a year
Like for like, traffic is up 7.9% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 86m |
| 2001 | 88m |
| 2002 | 92m |
| 2003 | 91m |
| 2004 | 92m |
| 2005 | 93m |
| 2006 | 95m |
| 2007 | 92m |
| 2008 | 90m |
| 2009 | 89m |
| 2010 | 85m |
| 2011 | 84m |
| 2012 | 83m |
| 2013 | 82m |
| 2014 | 84m |
| 2015 | 90m |
| 2016 | 87m |
| 2017 | 87m |
| 2018 | 87m |
| 2019 | 88m |
| 2020 | 64m |
| 2021 | 73m |
| 2022 | 78m |
| 2023 | 88m |
| 2024 | 90m |
| 2025 | 94m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 20,393 |
| 2001 | 21,029 |
| 2002 | 21,823 |
| 2003 | 21,743 |
| 2004 | 21,969 |
| 2005 | 22,257 |
| 2006 | 22,604 |
| 2007 | 21,942 |
| 2008 | 21,338 |
| 2009 | 21,109 |
| 2010 | 20,179 |
| 2011 | 20,095 |
| 2012 | 19,812 |
| 2013 | 19,599 |
| 2014 | 20,022 |
| 2015 | 21,388 |
| 2016 | 20,599 |
| 2017 | 20,649 |
| 2018 | 20,532 |
| 2019 | 20,503 |
| 2020 | 14,843 |
| 2021 | 16,909 |
| 2022 | 18,183 |
| 2023 | 20,524 |
| 2024 | 20,922 |
| 2025 | 21,834 |
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.
A332 collisions
Police recorded 77 collisions with the A332 as the first road from 2021 to 2025, 16 of them fatal or serious. That is 18.2 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 1.3 a year for each mile of road.
Reported collisions by year
Up 37.5% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 16 |
| 2022 | 11 |
| 2023 | 16 |
| 2024 | 12 |
| 2025 | 22 |
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 |
|---|---|
| Queens Acre, Windsor to A330 Windsor and Maidenhead, Bracknell Forest · 15 collisions | 11.4 |
| A355 to A308 Windsor and Maidenhead · 10 collisions | 9.1 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 14 collisions were recorded at junctions where the A332 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 A332
In route order. Each is the highway authority DfT files the count points under.
- Slough
- Windsor and Maidenhead
- Bracknell Forest
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 | 77 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.