A-road
A321 traffic and collisions
The A321 is an A-road of 18.0 miles, from Bracknell Forest to Wokingham. This page covers its traffic at 15 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 65m vehicle miles
- Average daily traffic 9,955 vehicles a day, both directions
- Busiest section 24,149 A30 to A3095
- HGV share 1.2% of vehicle miles
- Traffic since 2019 +0.3% same count points
- Collisions, 2021 to 2025 90 29.8 per 100m vehicle miles
How busy is the A321?
On an average day in 2025, 9,955 vehicles passed each point on the A321, counting both directions. The busiest section is A30 to A3095 (Bracknell Forest), with 24,149 a day; the quietest listed is A329 to Matthewsgreen Rd, with 4,019.
Busiest sections, 2025
A30 to A3095 carries 2.4 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A30 to A3095 Bracknell Forest · 1.2 mi · HGVs 2.0% | 24,149 |
| B3016 to Denmark St roundabout Wokingham · 1.4 mi · HGVs 0.9% | 16,861 |
| Church Rd, Sandhurst to B3016 Finchampstead Rd Bracknell Forest, Wokingham · 2.9 mi · HGVs 1.2% | 12,821 |
| A3095 to Church Rd Bracknell Forest · 1.6 mi · HGVs 0.4% | 10,839 |
| B3030 to A3032 Wokingham · 1.2 mi · HGVs 1.0% | 7,249 |
| A4 to A4130 Wokingham · 4.0 mi · HGVs 0.8% | 6,801 |
| A3032 to A4 Wokingham · 0.7 mi · HGVs 3.7% | 6,566 |
| Matthewsgreen Rd, Wokingham to B3034 Wokingham · 0.9 mi · HGVs 1.1% | 5,793 |
| B3034 to B3030 Wokingham · 2.5 mi · HGVs 1.0% | 5,315 |
| A329 to Matthewsgreen Rd Wokingham · 0.6 mi · HGVs 1.8% | 4,019 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Bracknell Forest to Wokingham · 18.0 miles
A321 traffic and collisions by section
12 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 2 short link roads and spurs (0.4 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A30 to A3095Bracknell Forest | 24,149 | 8 |
| 2 | A3095 to Church RdBracknell Forest | 10,839 | 21 |
| 3 | Church Rd, Sandhurst to B3016 Finchampstead RdBracknell Forest, Wokingham | 12,821 | 14 |
| 4 | B3016 to Denmark St roundaboutWokingham | 16,861 | 8 |
| 5 | Denmark St roundabout to B3349 Barkham RoadWokingham | 11,197 | 0 |
| 6 | B3349 Barkham Road to A329Wokingham | 11,437 | 0 |
| 7 | A329 to Matthewsgreen RdWokingham | 4,019 | 0 |
| 8 | Matthewsgreen Rd, Wokingham to B3034Wokingham | 5,793 | 3 |
| 9 | B3034 to B3030Wokingham | 5,315 | 4 |
| 10 | B3030 to A3032Wokingham | 7,249 | 9 |
| 11 | A3032 to A4Wokingham | 6,566 | 8 |
| 12 | A4 to A4130Wokingham | 6,801 | 9 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A321 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.
A321 traffic by vehicle type
Cars and taxis make up 85.1% of the vehicle miles on the A321. HGVs account for 1.2%, rising to 3.7% on A3032 to A4.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 2.1% |
| 2001 | 2.2% |
| 2002 | 2.2% |
| 2003 | 2.2% |
| 2004 | 2.3% |
| 2005 | 2.3% |
| 2006 | 2.2% |
| 2007 | 2.4% |
| 2008 | 2.1% |
| 2009 | 2.0% |
| 2010 | 1.9% |
| 2011 | 1.8% |
| 2012 | 1.8% |
| 2013 | 1.8% |
| 2014 | 1.8% |
| 2015 | 1.8% |
| 2016 | 1.7% |
| 2017 | 1.7% |
| 2018 | 1.6% |
| 2019 | 1.5% |
| 2020 | 1.7% |
| 2021 | 1.8% |
| 2022 | 1.7% |
| 2023 | 1.7% |
| 2024 | 1.4% |
| 2025 | 1.2% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A321 traffic trend
Traffic on the A321 came to 65.4 million vehicle miles in 2025. At the count points present in both years, it is about the same as in 2019, before the pandemic, and down 1.9% on 2015.
Vehicle miles a year
Like for like, traffic is down 8.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 78m |
| 2001 | 76m |
| 2002 | 77m |
| 2003 | 75m |
| 2004 | 75m |
| 2005 | 75m |
| 2006 | 75m |
| 2007 | 73m |
| 2008 | 70m |
| 2009 | 70m |
| 2010 | 64m |
| 2011 | 66m |
| 2012 | 65m |
| 2013 | 64m |
| 2014 | 66m |
| 2015 | 66m |
| 2016 | 64m |
| 2017 | 63m |
| 2018 | 65m |
| 2019 | 64m |
| 2020 | 49m |
| 2021 | 54m |
| 2022 | 59m |
| 2023 | 60m |
| 2024 | 63m |
| 2025 | 65m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 11,824 |
| 2001 | 11,569 |
| 2002 | 11,647 |
| 2003 | 11,406 |
| 2004 | 11,477 |
| 2005 | 11,387 |
| 2006 | 11,416 |
| 2007 | 11,115 |
| 2008 | 10,685 |
| 2009 | 10,714 |
| 2010 | 9,961 |
| 2011 | 10,155 |
| 2012 | 10,006 |
| 2013 | 9,941 |
| 2014 | 10,167 |
| 2015 | 10,238 |
| 2016 | 9,837 |
| 2017 | 9,671 |
| 2018 | 9,995 |
| 2019 | 9,985 |
| 2020 | 7,576 |
| 2021 | 8,368 |
| 2022 | 9,010 |
| 2023 | 9,170 |
| 2024 | 9,628 |
| 2025 | 9,955 |
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 15 count points were counted; DfT estimated the rest from earlier counts and local trends.
A321 collisions
Police recorded 90 collisions with the A321 as the first road from 2021 to 2025, fewer than 3 of them fatal or serious. That is 29.8 per 100 million vehicle miles, close to the 31.5 for all A-roads in Great Britain. On average there were 1.0 a year for each mile of road.
Reported collisions by year
Up 11.8% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 17 |
| 2022 | 19 |
| 2023 | 18 |
| 2024 | 17 |
| 2025 | 19 |
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 |
|---|---|
| A3095 to Church Rd Bracknell Forest · 21 collisions | 72.5 |
| Church Rd, Sandhurst to B3016 Finchampstead Rd Bracknell Forest, Wokingham · 14 collisions | 21.4 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 8 collisions were recorded at junctions where the A321 was the second road; they are not in the figures above. Fatal or serious uses DfT’s adjusted serious figures. 93.3% of the collisions could be placed on a section. How we count collisions
Council areas on the A321
In route order. Each is the highway authority DfT files the count points under.
- Bracknell Forest
- Wokingham
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 | 90 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.