A-road
A507 traffic and collisions
The A507 is an A-road of 30.5 miles, from Hertfordshire to Central Bedfordshire. This page covers its traffic at 11 DfT count points since 2000 and the collisions police recorded on it.
- Traffic in 2025 170m vehicle miles
- Average daily traffic 15,243 vehicles a day, both directions
- Busiest section 24,797 A1(M) to A6001
- HGV share 3.8% of vehicle miles
- Traffic since 2019 +2.5% same count points
- Collisions, 2021 to 2025 139 17.3 per 100m vehicle miles
How busy is the A507?
On an average day in 2025, 15,243 vehicles passed each point on the A507, counting both directions. The busiest section is A1(M) to A6001 (Central Bedfordshire), with 24,797 a day; the quietest listed is Wallington Rd, Baldock to A10, with 6,982.
Busiest sections, 2025
A1(M) to A6001 carries 1.6 times the road’s average flow.
| Section | Vehicles a day |
|---|---|
| A1(M) to A6001 Central Bedfordshire · 4.8 mi · HGVs 3.1% | 24,797 |
| A6001 to A600 Central Bedfordshire · 1.3 mi · HGVs 2.8% | 22,350 |
| At A600 Central Bedfordshire · 1.7 mi · HGVs 3.6% | 22,248 |
| A6 to A5120 Central Bedfordshire · 3.5 mi · HGVs 3.6% | 19,400 |
| A600 to A6 Central Bedfordshire · 3.6 mi · HGVs 4.5% | 17,337 |
| A421 Roundabout to A4102 Central Bedfordshire · 0.6 mi · HGVs 8.9% | 14,874 |
| A5120 to A4012 Central Bedfordshire · 5.1 mi · HGVs 5.1% | 12,336 |
| Salisbury Rd, Baldock to A1(M) Hertfordshire · 1.6 mi · HGVs 3.3% | 10,991 |
| Wallington Rd to A505 Hertfordshire · 0.5 mi · HGVs 3.6% | 7,750 |
| Wallington Rd, Baldock to A10 Hertfordshire · 7.6 mi · HGVs 3.6% | 6,982 |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Route
Hertfordshire to Central Bedfordshire · 30.5 miles
A507 traffic and collisions by section
11 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 | Wallington Rd, Baldock to A10Hertfordshire | 6,982 | 18 |
| 2 | Wallington Rd to A505Hertfordshire | 7,750 | fewer than 3 |
| 3 | A505 to Salisbury RdHertfordshire | 11,650 | 5 |
| 4 | Salisbury Rd, Baldock to A1(M)Hertfordshire | 10,991 | 10 |
| 5 | A1(M) to A6001Central Bedfordshire | 24,797 | 29 |
| 6 | A6001 to A600Central Bedfordshire | 22,350 | 13 |
| 7 | At A600Central Bedfordshire | 22,248 | 4 |
| 8 | A600 to A6Central Bedfordshire | 17,337 | 23 |
| 9 | A6 to A5120Central Bedfordshire | 19,400 | 20 |
| 10 | A5120 to A4012Central Bedfordshire | 12,336 | 13 |
| 11 | A421 Roundabout to A4102Central Bedfordshire | 14,874 | fewer than 3 |
Vehicles a day is the average daily flow in 2025. “Since 2019” compares the same count points. Collisions are those with the A507 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.
A507 traffic by vehicle type
Cars and taxis make up 77.1% of the vehicle miles on the A507. HGVs account for 3.8%, rising to 8.9% on A421 Roundabout to A4102.
Vehicle mix, 2025
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
HGV share of traffic
| Year | HGV share |
|---|---|
| 2000 | 7.4% |
| 2001 | 7.4% |
| 2002 | 7.4% |
| 2003 | 6.9% |
| 2004 | 7.3% |
| 2005 | 6.9% |
| 2006 | 6.9% |
| 2007 | 7.0% |
| 2008 | 6.8% |
| 2009 | 6.3% |
| 2010 | 6.2% |
| 2011 | 6.2% |
| 2012 | 6.0% |
| 2013 | 5.6% |
| 2014 | 5.4% |
| 2015 | 5.4% |
| 2016 | 5.1% |
| 2017 | 5.2% |
| 2018 | 5.3% |
| 2019 | 5.0% |
| 2020 | 5.8% |
| 2021 | 5.4% |
| 2022 | 4.4% |
| 2023 | 4.2% |
| 2024 | 4.0% |
| 2025 | 3.8% |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
A507 traffic trend
Traffic on the A507 came to 170 million vehicle miles in 2025. At the count points present in both years, it is up 2.5% on 2019, before the pandemic, and up 7.6% on 2015.
Vehicle miles a year
Like for like, traffic is up 37.2% on 2000.
| Year | Vehicle miles |
|---|---|
| 2000 | 131m |
| 2001 | 140m |
| 2002 | 141m |
| 2003 | 146m |
| 2004 | 148m |
| 2005 | 150m |
| 2006 | 162m |
| 2007 | 164m |
| 2008 | 164m |
| 2009 | 178m |
| 2010 | 150m |
| 2011 | 152m |
| 2012 | 150m |
| 2013 | 149m |
| 2014 | 152m |
| 2015 | 156m |
| 2016 | 161m |
| 2017 | 163m |
| 2018 | 165m |
| 2019 | 166m |
| 2020 | 129m |
| 2021 | 143m |
| 2022 | 161m |
| 2023 | 164m |
| 2024 | 165m |
| 2025 | 170m |
Source:DfT,UK Motoring analysis 2000 to 2025 Updated
Average daily flow
| Year | Vehicles a day |
|---|---|
| 2000 | 11,260 |
| 2001 | 12,024 |
| 2002 | 12,139 |
| 2003 | 12,496 |
| 2004 | 12,664 |
| 2005 | 12,920 |
| 2006 | 13,877 |
| 2007 | 14,058 |
| 2008 | 14,074 |
| 2009 | 13,282 |
| 2010 | 13,653 |
| 2011 | 13,827 |
| 2012 | 13,633 |
| 2013 | 13,534 |
| 2014 | 13,763 |
| 2015 | 14,166 |
| 2016 | 14,611 |
| 2017 | 14,758 |
| 2018 | 14,778 |
| 2019 | 14,869 |
| 2020 | 11,538 |
| 2021 | 12,857 |
| 2022 | 14,417 |
| 2023 | 14,718 |
| 2024 | 14,842 |
| 2025 | 15,243 |
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 11 count points were counted; DfT estimated the rest from earlier counts and local trends.
A507 collisions
Police recorded 139 collisions with the A507 as the first road from 2021 to 2025, 47 of them fatal or serious, including 4 fatal. That is 17.3 per 100 million vehicle miles, lower than the 31.5 for all A-roads in Great Britain. On average there were 0.9 a year for each mile of road.
Reported collisions by year
Up 20.8% from 2021 to 2025.
| Year | Slight | Fatal or serious |
|---|---|---|
| 2021 | 14 | 10 |
| 2022 | 19 | 8 |
| 2023 | 15 | 14 |
| 2024 | 23 | 7 |
| 2025 | 21 | 8 |
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 |
|---|---|
| Salisbury Rd, Baldock to A1(M) Hertfordshire · 10 collisions | 34.9 |
| A6001 to A600 Central Bedfordshire · 13 collisions | 23.5 |
| A600 to A6 Central Bedfordshire · 23 collisions | 21.3 |
| Wallington Rd, Baldock to A10 Hertfordshire · 18 collisions | 19.4 |
| A6 to A5120 Central Bedfordshire · 20 collisions | 16.4 |
| A1(M) to A6001 Central Bedfordshire · 29 collisions | 14.4 |
| A5120 to A4012 Central Bedfordshire · 13 collisions | 11.8 |
Source:DfT STATS19,UK Motoring analysis 2021 to 2025 Updated
A further 19 collisions were recorded at junctions where the A507 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 A507
In route order. Each is the highway authority DfT files the count points under.
- Hertfordshire
- Central Bedfordshire
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 | 11 count points in 2025 | 15 September 2026 |
| Reported collisions | Road safety open data (STATS19) Department for Transport Derived statistics UK Motoring | 2021 to 2025 | 139 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.