A-road
A1123 traffic and collisions
The A1123 is an A-road of 24.5 miles, in Cambridgeshire. This page covers its traffic at 5 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 58m vehicle miles
- Average daily traffic 6,512 vehicles a day, both directions
- Busiest section 17,349 A141 to Hill Rise
- HGV share 4.0% of vehicle miles
- Traffic since 2019 −17.1% same count points
- Collisions, 2021 to 2025 74 24.8 per 100m vehicle miles
How busy is the A1123?
On an average day in 2025, 6,512 vehicles passed each point on the A1123, counting both directions. The busiest section is A141 to Hill Rise (Cambridgeshire), with 17,349 a day; the quietest listed is A1096 to A1421, with 2,863.
Busiest sections, 2025
A141 to Hill Rise carries 2.7 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A141 to Hill Rise Cambridgeshire · 3.0 mi · HGVs 3.4% | 17,349 |
| Hill Rise to A1096 Cambridgeshire · 1.1 mi · HGVs 4.1% | 15,322 |
| A1421 to A10 Cambridgeshire · 3.0 mi · HGVs 2.8% | 9,752 |
| A10 to A142 Cambridgeshire · 7.6 mi · HGVs 4.2% | 4,385 |
| A1096 to A1421 Cambridgeshire · 9.8 mi · HGVs 6.0% | 2,863 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
In Cambridgeshire · 24.5 miles
A1123 traffic and collisions by section
5 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 | A141 to Hill RiseCambridgeshire | 17,349 | 16 |
| 2 | Hill Rise to A1096Cambridgeshire | 15,322 | 14 |
| 3 | A1096 to A1421Cambridgeshire | 2,863 | 21 |
| 4 | A1421 to A10Cambridgeshire | 9,752 | 12 |
| 5 | A10 to A142Cambridgeshire | 4,385 | 11 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A1123 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.
A1123 traffic by vehicle type
Cars and taxis make up 79.4% of the vehicle miles on the A1123. HGVs account for 4.0%, rising to 6.0% on A1096 to A1421.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 5.5% |
| 2001 | 5.2% |
| 2002 | 5.7% |
| 2003 | 5.7% |
| 2004 | 6.6% |
| 2005 | 6.4% |
| 2006 | 5.7% |
| 2007 | 6.0% |
| 2008 | 5.2% |
| 2009 | 4.8% |
| 2010 | 5.0% |
| 2011 | 5.1% |
| 2012 | 5.2% |
| 2013 | 5.3% |
| 2014 | 5.3% |
| 2015 | 5.3% |
| 2016 | 5.1% |
| 2017 | 5.5% |
| 2018 | 5.6% |
| 2019 | 5.5% |
| 2020 | 7.3% |
| 2021 | 5.8% |
| 2022 | 5.6% |
| 2023 | 5.7% |
| 2024 | 5.2% |
| 2025 | 4.0% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A1123 traffic trend
Traffic on the A1123 came to 58.2 million vehicle miles in 2025. At the count points present in both years, it is down 17.1% on 2019, before the pandemic, and down 7.3% on 2015.
Vehicle miles a year
Like for like, traffic is down 2.1% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 70m |
| 2001 | 71m |
| 2002 | 70m |
| 2003 | 73m |
| 2004 | 77m |
| 2005 | 77m |
| 2006 | 75m |
| 2007 | 77m |
| 2008 | 74m |
| 2009 | 73m |
| 2010 | 72m |
| 2011 | 73m |
| 2012 | 72m |
| 2013 | 72m |
| 2014 | 74m |
| 2015 | 75m |
| 2016 | 76m |
| 2017 | 81m |
| 2018 | 81m |
| 2019 | 82m |
| 2020 | 55m |
| 2021 | 57m |
| 2022 | 62m |
| 2023 | 60m |
| 2024 | 62m |
| 2025 | 58m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 7,868 |
| 2001 | 7,927 |
| 2002 | 7,807 |
| 2003 | 8,148 |
| 2004 | 8,641 |
| 2005 | 8,615 |
| 2006 | 8,468 |
| 2007 | 8,645 |
| 2008 | 8,311 |
| 2009 | 8,238 |
| 2010 | 8,068 |
| 2011 | 8,139 |
| 2012 | 8,064 |
| 2013 | 8,060 |
| 2014 | 8,284 |
| 2015 | 8,435 |
| 2016 | 8,508 |
| 2017 | 9,086 |
| 2018 | 9,114 |
| 2019 | 9,174 |
| 2020 | 6,136 |
| 2021 | 6,416 |
| 2022 | 6,910 |
| 2023 | 6,686 |
| 2024 | 6,896 |
| 2025 | 6,512 |
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 (60.0% of today’s road for 2019). In 2025, 1 of the 5 count points were counted; DfT estimated the rest from earlier counts and local trends.
A1123 collisions
Police recorded 74 collisions with the A1123 as the first road from 2021 to 2025, 31 of them fatal or serious. That is 24.8 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.6 a year for each mile of road.
Reported collisions by year
Down 38.9% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 8 | 10 |
| 2022 | 8 | 4 |
| 2023 | 14 | 7 |
| 2024 | 6 | 6 |
| 2025 | 7 | 4 |
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 |
|---|---|
| Hill Rise to A1096 Cambridgeshire · 14 collisions | 46.9 |
| A1096 to A1421 Cambridgeshire · 21 collisions | 42.6 |
| A1421 to A10 Cambridgeshire · 12 collisions | 25.0 |
| A141 to Hill Rise Cambridgeshire · 16 collisions | 16.4 |
| A10 to A142 Cambridgeshire · 11 collisions | 14.8 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 9 collisions were recorded at junctions where the A1123 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 A1123
In route order. Each is the highway authority DfT files the count points under.
- Cambridgeshire
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 | 5 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 74 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.