A-road
A4100 traffic and collisions
The A4100 is an A-road of 4.3 miles, from Sandwell to Dudley. This page covers its traffic at 7 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 25m vehicle miles
- Average daily traffic 16,140 vehicles a day, both directions
- Busiest section 18,623 A4036 to A461
- HGV share 2.3% of vehicle miles
- Traffic since 2019 +0.2% same count points
- Collisions, 2021 to 2025 84 66.9 per 100m vehicle miles
How busy is the A4100?
On an average day in 2025, 16,140 vehicles passed each point on the A4100, counting both directions. The busiest section is A4036 to A461 (Dudley), with 18,623 a day; the quietest listed is A4100 Highgate Street to A4034, with 12,775.
Busiest sections, 2025
A4036 to A461 carries 1.2 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A4036 to A461 Dudley · 0.7 mi · HGVs 0.7% | 18,623 |
| A459 to A4036 Sandwell, Dudley · 2.0 mi · HGVs 2.2% | 17,987 |
| A4100 Highgate Street to A4034 Sandwell · 1.3 mi · HGVs 3.7% | 12,775 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Sandwell to Dudley · 4.3 miles
A4100 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 | A4034 Oldbury Road to A4100Sandwell | 12,775 | fewer than 3 |
| 2 | A4100 Highgate Street to A4034Sandwell | 12,775 | 29 |
| 3 | A459 Halesowen Road to A459 Heathfield WaySandwell | 17,319 | 3 |
| 4 | A459 to A4036Sandwell, Dudley | 17,987 | 39 |
| 5 | A4036 to A461Dudley | 18,623 | 12 |
| 6 | High Street (minor road) to A461 Venture WayDudley | 7,758 | 0 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A4100 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.
A4100 traffic by vehicle type
Cars and taxis make up 83.8% of the vehicle miles on the A4100. HGVs account for 2.3%, rising to 3.7% on A4100 Highgate Street to A4034.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 4.8% |
| 2001 | 4.2% |
| 2002 | 3.8% |
| 2003 | 3.8% |
| 2004 | 4.8% |
| 2005 | 5.2% |
| 2006 | 4.5% |
| 2007 | 3.9% |
| 2008 | 3.3% |
| 2009 | 3.1% |
| 2010 | 3.1% |
| 2011 | 3.2% |
| 2012 | 3.3% |
| 2013 | 3.5% |
| 2014 | 3.6% |
| 2015 | 3.5% |
| 2016 | 3.0% |
| 2017 | 3.0% |
| 2018 | 3.1% |
| 2019 | 3.1% |
| 2020 | 3.5% |
| 2021 | 3.4% |
| 2022 | 3.3% |
| 2023 | 3.2% |
| 2024 | 2.4% |
| 2025 | 2.3% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A4100 traffic trend
Traffic on the A4100 came to 25.3 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 up 9.9% on 2015.
Vehicle miles a year
Like for like, traffic is up 23.1% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 21m |
| 2001 | 20m |
| 2002 | 20m |
| 2003 | 19m |
| 2004 | 19m |
| 2005 | 18m |
| 2006 | 19m |
| 2007 | 19m |
| 2008 | 21m |
| 2009 | 21m |
| 2010 | 21m |
| 2011 | 21m |
| 2012 | 21m |
| 2013 | 21m |
| 2014 | 22m |
| 2015 | 22m |
| 2016 | 24m |
| 2017 | 24m |
| 2018 | 24m |
| 2019 | 25m |
| 2020 | 22m |
| 2021 | 24m |
| 2022 | 26m |
| 2023 | 26m |
| 2024 | 24m |
| 2025 | 25m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 13,425 |
| 2001 | 13,060 |
| 2002 | 12,889 |
| 2003 | 12,465 |
| 2004 | 12,125 |
| 2005 | 11,754 |
| 2006 | 12,292 |
| 2007 | 12,384 |
| 2008 | 13,754 |
| 2009 | 14,019 |
| 2010 | 14,107 |
| 2011 | 14,211 |
| 2012 | 14,099 |
| 2013 | 14,136 |
| 2014 | 14,596 |
| 2015 | 14,943 |
| 2016 | 16,330 |
| 2017 | 16,333 |
| 2018 | 16,213 |
| 2019 | 16,305 |
| 2020 | 14,277 |
| 2021 | 15,675 |
| 2022 | 16,764 |
| 2023 | 17,049 |
| 2024 | 15,504 |
| 2025 | 16,140 |
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 7 count points were counted; DfT estimated the rest from earlier counts and local trends.
A4100 collisions
Police recorded 84 collisions with the A4100 as the first road from 2021 to 2025, fewer than 3 of them fatal or serious. That is 66.9 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 3.9 a year for each mile of road.
Reported collisions by year
Down 29.4% from 2021 to 2025.
| Year | Collisions |
|---|---|
| 2021 | 17 |
| 2022 | 19 |
| 2023 | 15 |
| 2024 | 21 |
| 2025 | 12 |
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 |
|---|---|
| A4100 Highgate Street to A4034 Sandwell · 29 collisions | 98.0 |
| A4036 to A461 Dudley · 12 collisions | 61.4 |
| A459 to A4036 Sandwell, Dudley · 39 collisions | 55.3 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 15 collisions were recorded at junctions where the A4100 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 A4100
In route order. Each is the highway authority DfT files the count points under.
- Sandwell
- Dudley
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 | 84 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.