A-road
A37 traffic and collisions
The A37 is an A-road of 57.1 miles, from City of Bristol to Dorset. This page covers its traffic at 23 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 263m vehicle miles
- Average daily traffic 12,630 vehicles a day, both directions
- Busiest section 22,600 A361 to A371
- HGV share 6.5% of vehicle miles
- Traffic since 2019 +6.2% same count points
- Collisions, 2021 to 2025 277 22.6 per 100m vehicle miles
How busy is the A37?
On an average day in 2025, 12,630 vehicles passed each point on the A37, counting both directions. The busiest section is A361 to A371 (Somerset), with 22,600 a day; the quietest listed is A39 to A367, with 7,905.
Busiest sections, 2025
A361 to A371 carries 1.8 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A361 to A371 Somerset · 0.6 mi · HGVs 7.6% | 22,600 |
| A352 North Street Junction to A35 Monkey Jump Roundabout Dorset · 1.7 mi · HGVs 4.0% | 21,497 |
| A359 Somerset · 4.8 mi · HGVs 3.5% | 16,484 |
| A368 Bath and North East Somerset · 4.3 mi · HGVs 5.6% | 15,629 |
| A367 to A361 Somerset · 2.1 mi · HGVs 6.6% | 15,569 |
| A39 to A362 Bath and North East Somerset · 0.9 mi · HGVs 6.5% | 15,271 |
| A362 to A39 Bath and North East Somerset, Somerset · 0.5 mi · HGVs 6.6% | 15,160 |
| B3122 to A4174 City of Bristol · 0.6 mi · HGVs 3.4% | 14,957 |
| A356 Junction to A352 North Street Junction Dorset · 3.0 mi · HGVs 5.7% | 14,656 |
| A4174 to Council boundary City of Bristol · 1.2 mi · HGVs 5.5% | 14,498 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
City of Bristol to Dorset · 57.1 miles
A37 traffic and collisions by section
21 sections between junctions, in route order. Each is the average of its DfT count points, weighted by length.
Show all 21 sections Tap a column heading to sort
| # | |||
|---|---|---|---|
| 1 | A4 to B3122City of Bristol | 13,229 | 45 |
| 2 | B3122 to A4174City of Bristol | 14,957 | 22 |
| 3 | A4174 to Council boundaryCity of Bristol | 14,498 | 24 |
| 4 | A368Bath and North East Somerset | 15,629 | 11 |
| 5 | A368 to A39Bath and North East Somerset | 10,883 | 8 |
| 6 | A39 to A362Bath and North East Somerset | 15,271 | fewer than 3 |
| 7 | A362 to A39Bath and North East Somerset, Somerset | 15,160 | fewer than 3 |
| 8 | A39 to A367Somerset | 7,905 | 18 |
| 9 | A367 to A361Somerset | 15,569 | 14 |
| 10 | At A361Somerset | 8,427 | 4 |
| 11 | A361 to A371Somerset | 22,600 | fewer than 3 |
| 12 | A371 to A361Somerset | 13,716 | 0 |
| 13 | A361 to Stone LaneSomerset | 9,612 | 11 |
| 14 | Stone Lane to B3153Somerset | 10,719 | 5 |
| 15 | B3153 to A303Somerset | 9,591 | 13 |
| 16 | A359Somerset | 16,484 | 27 |
| 17 | A359 to A30Somerset | 36,417 | 3 |
| 18 | A30 to East Coker RdSomerset | 14,477 | fewer than 3 |
| 19 | East Coker Rd, Yeovil to A356Somerset, Dorset | 11,854 | 43 |
| 20 | A356 Junction to A352 North Street JunctionDorset | 14,656 | 10 |
| 21 | A352 North Street Junction to A35 Monkey Jump RoundaboutDorset | 21,497 | 11 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A37 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.
A37 traffic by vehicle type
Cars and taxis make up 73.0% of the vehicle miles on the A37. HGVs account for 6.5%, rising to 11.1% on A39 to A367.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 8.0% |
| 2001 | 8.0% |
| 2002 | 8.0% |
| 2003 | 7.8% |
| 2004 | 7.9% |
| 2005 | 7.7% |
| 2006 | 7.7% |
| 2007 | 7.8% |
| 2008 | 7.6% |
| 2009 | 7.1% |
| 2010 | 7.0% |
| 2011 | 6.8% |
| 2012 | 6.8% |
| 2013 | 7.0% |
| 2014 | 6.9% |
| 2015 | 7.0% |
| 2016 | 6.8% |
| 2017 | 6.7% |
| 2018 | 6.7% |
| 2019 | 6.7% |
| 2020 | 7.7% |
| 2021 | 7.5% |
| 2022 | 7.2% |
| 2023 | 6.8% |
| 2024 | 6.5% |
| 2025 | 6.5% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A37 traffic trend
Traffic on the A37 came to 263 million vehicle miles in 2025. At the count points present in both years, it is up 6.2% on 2019, before the pandemic, and up 12.9% on 2015.
Vehicle miles a year
Like for like, traffic is up 21.5% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 224m |
| 2001 | 226m |
| 2002 | 230m |
| 2003 | 237m |
| 2004 | 238m |
| 2005 | 238m |
| 2006 | 238m |
| 2007 | 239m |
| 2008 | 237m |
| 2009 | 237m |
| 2010 | 235m |
| 2011 | 233m |
| 2012 | 232m |
| 2013 | 231m |
| 2014 | 234m |
| 2015 | 240m |
| 2016 | 251m |
| 2017 | 255m |
| 2018 | 253m |
| 2019 | 252m |
| 2020 | 199m |
| 2021 | 221m |
| 2022 | 241m |
| 2023 | 247m |
| 2024 | 252m |
| 2025 | 263m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 10,787 |
| 2001 | 10,865 |
| 2002 | 11,062 |
| 2003 | 11,416 |
| 2004 | 11,479 |
| 2005 | 11,469 |
| 2006 | 11,437 |
| 2007 | 11,490 |
| 2008 | 11,394 |
| 2009 | 11,424 |
| 2010 | 11,309 |
| 2011 | 11,229 |
| 2012 | 11,182 |
| 2013 | 11,135 |
| 2014 | 11,280 |
| 2015 | 11,537 |
| 2016 | 12,077 |
| 2017 | 12,281 |
| 2018 | 12,151 |
| 2019 | 12,093 |
| 2020 | 9,526 |
| 2021 | 10,604 |
| 2022 | 11,550 |
| 2023 | 11,870 |
| 2024 | 12,109 |
| 2025 | 12,630 |
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 (74.1% of today’s road for 2019). In 2025, 2 of the 23 count points were counted; DfT estimated the rest from earlier counts and local trends.
A37 collisions
Police recorded 277 collisions with the A37 as the first road from 2021 to 2025, 93 of them fatal or serious, including 5 fatal. That is 22.6 per 100 million vehicle miles, lower than 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 10.6% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 33 | 14 |
| 2022 | 38 | 23 |
| 2023 | 37 | 16 |
| 2024 | 39 | 25 |
| 2025 | 38 | 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 |
|---|---|
| A4 to B3122 City of Bristol · 45 collisions | 213.7 |
| B3122 to A4174 City of Bristol · 22 collisions | 138.6 |
| A4174 to Council boundary City of Bristol · 24 collisions | 82.0 |
| A367 to A361 Somerset · 14 collisions | 24.4 |
| A39 to A367 Somerset · 18 collisions | 22.5 |
| B3153 to A303 Somerset · 13 collisions | 19.5 |
| A359 Somerset · 27 collisions | 18.4 |
| A352 North Street Junction to A35 Monkey Jump Roundabout Dorset · 11 collisions | 17.6 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 26 collisions were recorded at junctions where the A37 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 A37
In route order. Each is the highway authority DfT files the count points under.
- City of Bristol
- Bath and North East Somerset
- Somerset
- Dorset
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 | 23 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 277 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.