A-road
A1156 traffic and collisions
The A1156 is an A-road of 9.4 miles, in Suffolk. This page covers its traffic at 17 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 54m vehicle miles
- Average daily traffic 15,665 vehicles a day, both directions
- Busiest section 27,870 A1189 to A1156
- HGV share 1.2% of vehicle miles
- Traffic since 2019 −2.8% same count points
- Collisions, 2021 to 2025 194 77.0 per 100m vehicle miles
How busy is the A1156?
On an average day in 2025, 15,665 vehicles passed each point on the A1156, counting both directions. The busiest section is A1189 to A1156 (Suffolk), with 27,870 a day; the quietest listed is A1189 Bixley Road to B1458 Duke Street, with 12,190.
Busiest sections, 2025
A1189 to A1156 carries 1.8 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A1189 to A1156 Suffolk · 0.6 mi · HGVs 0.8% | 27,870 |
| A14 to A1214 Suffolk · 2.1 mi · HGVs 1.8% | 21,125 |
| B1076 Great Coleman Street to A1022 Civic Drive Suffolk · 0.5 mi · HGVs 1.1% | 14,337 |
| A1214 to A1022 Suffolk · 0.6 mi · HGVs 1.1% | 13,529 |
| Junction A14/A12/A1156 to Roundabout A1156/A1189 Suffolk · 2.4 mi · HGVs 0.7% | 13,151 |
| A1189 Bixley Road to B1458 Duke Street Suffolk · 1.7 mi · HGVs 1.0% | 12,190 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
In Suffolk · 9.4 miles
A1156 traffic and collisions by section
10 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length. 7 short link roads and spurs (1.0 miles) count in the road’s totals but are not listed.
Sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A14 to A1214Suffolk | 21,125 | 47 |
| 2 | A1214 to A1022Suffolk | 13,529 | 38 |
| 3 | B1076 Great Coleman Street to A1022 Civic DriveSuffolk | 14,337 | 17 |
| 4 | B1076 Great Colman St to Bond StreetSuffolk | 15,031 | 3 |
| 5 | Bond Street to Grimnwade Street/B1075Suffolk | 11,329 | fewer than 3 |
| 6 | Star Lane Junction to St Helen's StreetSuffolk | 8,517 | 3 |
| 7 | Fore Street to Star LaneSuffolk | 15,922 | 4 |
| 8 | A1189 Bixley Road to B1458 Duke StreetSuffolk | 12,190 | 30 |
| 9 | A1189 to A1156Suffolk | 27,870 | 15 |
| 10 | Junction A14/A12/A1156 to Roundabout A1156/A1189Suffolk | 13,151 | 15 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A1156 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.
A1156 traffic by vehicle type
Cars and taxis make up 84.9% of the vehicle miles on the A1156. HGVs account for 1.2%.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 1.6% |
| 2001 | 1.6% |
| 2002 | 2.2% |
| 2003 | 2.2% |
| 2004 | 2.5% |
| 2005 | 2.4% |
| 2006 | 2.5% |
| 2007 | 2.2% |
| 2008 | 2.3% |
| 2009 | 2.1% |
| 2010 | 2.2% |
| 2011 | 2.0% |
| 2012 | 1.8% |
| 2013 | 1.8% |
| 2014 | 1.8% |
| 2015 | 1.7% |
| 2016 | 1.6% |
| 2017 | 1.5% |
| 2018 | 1.5% |
| 2019 | 1.3% |
| 2020 | 1.5% |
| 2021 | 1.5% |
| 2022 | 1.4% |
| 2023 | 1.4% |
| 2024 | 1.3% |
| 2025 | 1.2% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A1156 traffic trend
Traffic on the A1156 came to 53.7 million vehicle miles in 2025. At the count points present in both years, it is down 2.8% on 2019, before the pandemic, and about the same as in 2015.
Vehicle miles a year
Like for like, traffic is down 11.3% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 55m |
| 2001 | 56m |
| 2002 | 57m |
| 2003 | 55m |
| 2004 | 54m |
| 2005 | 54m |
| 2006 | 50m |
| 2007 | 53m |
| 2008 | 51m |
| 2009 | 51m |
| 2010 | 50m |
| 2011 | 49m |
| 2012 | 48m |
| 2013 | 48m |
| 2014 | 49m |
| 2015 | 51m |
| 2016 | 52m |
| 2017 | 54m |
| 2018 | 54m |
| 2019 | 53m |
| 2020 | 41m |
| 2021 | 45m |
| 2022 | 49m |
| 2023 | 50m |
| 2024 | 54m |
| 2025 | 54m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 16,781 |
| 2001 | 16,923 |
| 2002 | 17,271 |
| 2003 | 16,857 |
| 2004 | 16,548 |
| 2005 | 16,206 |
| 2006 | 15,173 |
| 2007 | 16,012 |
| 2008 | 15,448 |
| 2009 | 15,444 |
| 2010 | 15,102 |
| 2011 | 15,034 |
| 2012 | 14,567 |
| 2013 | 14,620 |
| 2014 | 14,941 |
| 2015 | 15,612 |
| 2016 | 15,821 |
| 2017 | 16,282 |
| 2018 | 16,203 |
| 2019 | 15,669 |
| 2020 | 12,096 |
| 2021 | 13,526 |
| 2022 | 14,533 |
| 2023 | 14,641 |
| 2024 | 15,636 |
| 2025 | 15,665 |
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 (74.5% of today’s road for 2019). In 2025, 1 of the 17 count points were counted; DfT estimated the rest from earlier counts and local trends.
A1156 collisions
Police recorded 194 collisions with the A1156 as the first road from 2021 to 2025, 40 of them fatal or serious. That is 77.0 per 100 million vehicle miles, higher than the 31.5 for all A-roads in Great Britain. On average there were 4.1 a year for each mile of road.
Reported collisions by year
Up 25.0% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 35 | 5 |
| 2022 | 33 | 9 |
| 2023 | 22 | 9 |
| 2024 | 28 | 3 |
| 2025 | 36 | 14 |
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 |
|---|---|
| A1214 to A1022 Suffolk · 38 collisions | 264.8 |
| B1076 Great Coleman Street to A1022 Civic Drive Suffolk · 17 collisions | 134.1 |
| A1189 Bixley Road to B1458 Duke Street Suffolk · 30 collisions | 80.2 |
| A14 to A1214 Suffolk · 47 collisions | 59.9 |
| A1189 to A1156 Suffolk · 15 collisions | 51.7 |
| Junction A14/A12/A1156 to Roundabout A1156/A1189 Suffolk · 15 collisions | 47.3 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 39 collisions were recorded at junctions where the A1156 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 A1156
In route order. Each is the highway authority DfT files the count points under.
- Suffolk
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 | 17 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 194 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.