Barton Road Butleigh, Somerset
57 addresses across 3 postcodes (BA6), about 1.3 km (0.8 miles) long, classed as a minor road. USRN 25001530.
- Sales: 46 recorded sales since 1995; in 2023 the median was £576,000 across 1 sale.
- Prices and rents: A typical home in Somerset cost £282,498 in August 2026 (+2.8% on a year); private rents averaged £1,021 a month.
- Energy: 27 homes have an energy certificate (B: 3, C: 7, D: 10, E: 7).
- Flood: No address on its postcodes is in an area at high or medium risk of flooding from rivers, the sea or surface water.
- Recorded floods: No recorded flood covers the centre of any of its postcodes.
- Radon: Up to 10 to 30% of homes in the 1 km squares around it are estimated to be at or above the radon Action Level.
- Council tax: Most homes around it are in council tax band E; Band D in Somerset costs £2,561 a year in 2026-27.
- Broadband: Gigabit broadband is available to 0% of premises.
- Transport: The nearest railway station is Castle Cary, about 11.3 km (7 miles) away in a straight line.
- Green space: The nearest park or garden, Stocks Green, is about 2.3 km (1.4 miles) away.
- Air: Background air pollution in 2024 was 3.9 µg/m³ of nitrogen dioxide and 5.4 of PM2.5, within UK legal limits.
- Height: Its addresses are 23 to 43 m above sea level.
- Noise: 6 of its 57 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Vine Surgery Partnership, about 5.1 km (3.1 miles) away.
- People: About 440 people lived in the census areas around it in 2021; 83% of households owned their home and 45% of adults held a degree or other higher qualification.
- Crime: 3 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
- Road safety: No collisions in which someone was hurt were reported on and around it in 2021 to 2025.
£9.99 The Street Dossier Full Report for a home on Barton Road: its own records, questions to ask the seller and everything on this page, in one PDF. Choose the home
House sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2023 | 1 | £576,000 | £576,000 | £576,000 |
| 2022 | 2 | £1,113,500 | £627,000 | £1,600,000 |
| 2021 | 3 | £860,000 | £805,000 | £990,000 |
| 2020 | 2 | £940,000 | £505,000 | £1,375,000 |
| 2019 | 1 | £1,400,000 | £1,400,000 | £1,400,000 |
| 2018 | 2 | £722,500 | £695,000 | £750,000 |
| 2017 | 5 | £550,000 | £462,500 | £1,160,000 |
| 2016 | 6 | £597,500 | £483,500 | £705,000 |
| 2015 | 2 | £705,000 | £485,000 | £925,000 |
| 2014 | 2 | £732,500 | £490,000 | £975,000 |
| 2013 | 1 | £540,000 | £540,000 | £540,000 |
| 2011 | 1 | £440,000 | £440,000 | £440,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 15 Jul 2011 | 59 - 60 BA6 8TH | Detached | £440,000 | |
| 17 Dec 2021 | BARTONSTONE HOUSE, 59 - 60 BA6 8TH | Detached | £860,000 | |
| 9 Dec 2016 | BARTONSTONE HOUSE, 59 - 60 BA6 8TH | Detached | £705,000 | |
| 2 Jul 2007 | 62 BA6 8TH | Terraced | £285,000 | |
| 7 Dec 2010 | 63A BA6 8TH | Terraced | £200,000 | |
| 4 May 2006 | 63A BA6 8TH | Terraced | £119,999 | |
| 30 Oct 1997 | 64 BA6 8TH | Terraced | £98,000 | |
| 11 Jun 2004 | 66 BA6 8TH | Detached | £470,000 | |
| 13 Oct 2016 | ODDWAY HOUSE, 66 BA6 8TH | Detached | £550,000 | |
| 8 Sep 2023 | 102 BA6 8TL | Detached | £576,000 | |
| 22 Sep 1999 | 103 BA6 8TL | Detached | £150,000 | |
| 14 Jun 2019 | BELGROVE BA6 8TL | Detached | £1,400,000 | |
| 8 Nov 2017 | BELGROVE BA6 8TL | Detached | £462,500 | |
| 11 Nov 2020 | BETHEL COTTAGE BA6 8TL | Detached | £505,000 | |
| 30 Jul 2001 | BETHEL COTTAGE BA6 8TL | Detached | £200,000 | |
| 15 Feb 2021 | COOMBE LODGE BA6 8TH | Detached | £805,000 | |
| 27 Jul 2016 | COOMBE LODGE BA6 8TH | Detached | £673,500 | |
| 9 Jul 1996 | COOMBE LODGE BA6 8TH | Detached | £170,000 | |
| 5 Aug 2016 | COPPERFIELDS BA6 8TH | Detached | £483,500 | |
| 26 Sep 2016 | CORBIE BA6 8TH | Detached | £645,000 | |
| 22 Jun 2009 | CORBIE BA6 8TH | Detached | £307,500 | |
| 13 Sep 2018 | CORNER WELL HOUSE BA6 8TL | Detached | £750,000 | |
| 7 Aug 1998 | CORNER WELL HOUSE BA6 8TL | Detached | £200,000 | |
| 23 Mar 2022 | FAIRMILE BA6 8TH | Detached | £627,000 | |
| 24 Aug 2018 | FISHPONDS BA6 8TL | Detached | £695,000 | |
| 10 Jul 2013 | FISHPONDS BA6 8TL | Detached | £540,000 | |
| 16 Dec 2015 | HUNTERS LODGE BA6 8TH | Detached | £485,000 | |
| 30 Nov 2010 | HUNTERS LODGE BA6 8TH | Detached | £359,950 | |
| 1 Oct 1997 | HUNTERS LODGE BA6 8TH | Detached | £172,500 | |
| 21 Nov 2001 | MOORINGS BA6 8TH | Detached | £287,500 | |
| 24 May 1995 | MOORINGS BA6 8TH | Detached | £146,000 | |
| 28 Aug 2009 | ODDWAY COTTAGE BA6 8TH | Detached | £410,000 | |
| 13 Jan 2017 | ODDWAY TOP BA6 8TH | Detached | £676,500 | |
| 13 Oct 2022 | ORCHARD HOUSE BA6 8TH | Detached | £1,600,000 | |
| 7 Aug 2020 | ORCHARD HOUSE BA6 8TH | Detached | £1,375,000 | |
| 13 Nov 2015 | ORCHARD HOUSE BA6 8TH | Detached | £925,000 | |
| 8 Sep 2014 | ORCHARD HOUSE BA6 8TH | Detached | £490,000 | |
| 12 Jan 2017 | POND HEAD COTTAGE BA6 8TL | Other | £510,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 9 Jul 2015 | POND HEAD COTTAGE BA6 8TL | Detached | £340,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 17 Oct 2006 | POND HEAD COTTAGE BA6 8TL | Detached | £520,000 | |
| 2 Sep 2021 | THE PADDOCK BA6 8TH | Detached | £990,000 | |
| 28 Mar 2017 | THE PADDOCK BA6 8TH | Detached | £550,000 | |
| 29 Sep 2016 | THE PRESCOTTS BA6 8TH | Detached | £485,000 | |
| 5 Sep 2017 | WHITELAWN BA6 8TL | Detached | £1,160,000 | |
| 12 Aug 2014 | WHITELAWN BA6 8TL | Detached | £975,000 | |
| 8 Dec 2017 | WINDRUSH BA6 8TH | Detached | £475,000 |
House prices and rents in Somerset
A typical home in Somerset cost £282,498 in August 2026, 2.8% more than a year before. That is 14% more than five years earlier and 37% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £459,165 |
| Semi-detached | £289,787 |
| Terraced | £235,285 |
| Flat or maisonette | £136,214 |
| Bought by a first-time buyer | £232,749 |
Private renters in Somerset paid £1,021 a month on average in September 2026, 6.3% more than a year before. That is 35% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £695 |
| Two bedrooms | £918 |
| Three bedrooms | £1,142 |
| Four or more bedrooms | £1,628 |
Energy performance certificates
27 homes with a current certificate; median floor area 175 m². Most common: House, detached (18); Bungalow, detached (3); House, semi-detached (2). Built: before 1900 (14); 1950-1966 (4); 1967-1975 (3). Tenure at assessment: owner-occupied (21); rented (private) (1).
Each home's certificates and sales (27 addresses)
- 59-60, Barton Road, Butleigh
- 63a, Barton Road, Butleigh
- 63b, Barton Road, Butleigh
- 66, Barton Road, Butleigh
- 71 Barton Road, Butleigh
- 102 Barton Road, Butleigh
- Avalon, Permaculture Gardens, Barton Road, Butleigh
- Belgrove, Barton Road, Butleigh
- Bethel Cottage, Barton Road, Butleigh
- Coombe Lodge, Barton Road, Butleigh
- Copperfields, Barton Road, Butleigh
- Corbie, Barton Road, Butleigh
- Corner Well House, Barton Road, Butleigh
- Dove Studios, Barton Road, Butleigh
- Fairmile, Barton Road, Butleigh
- Fishponds, Barton Road, Butleigh
- Greenhill House, Barton Road, Butleigh
- Hunters Lodge, Barton Road, Butleigh
- Moorings, Barton Road
- Oddway Cottage, Barton Road, Butleigh
- Oddway Top, Barton Road, Butleigh
- Orchard House, Barton Road, Butleigh
- Spinoza, Barton Road, Butleigh
- THE PADDOCK, BARTON ROAD, BUTLEIGH
- The Prescotts, Barton Road, Butleigh
- Whitelawn, Barton Road, Butleigh
- Windrush, Barton Road, Butleigh
Gas and electricity use
Homes with gas used 16,837 kWh of it on average in 2024, 74% more than the district's 9,692 kWh, and 5,639 kWh of electricity, 49% more than the district's 3,793 kWh. There are gas meters for about 81% of the homes.
| Postcode | Electricity meters | Typical electricity | Gas meters | Typical gas |
|---|---|---|---|---|
| BA6 8TL | 14 | 3,805 kWh | 11 | 10,931 kWh |
| BA6 8TH | 22 | 4,737 kWh | 18 | 20,421 kWh |
These are all the homes on each postcode, whatever their size and however many live in them, so they show the kind of homes and heating here rather than what any one home uses. The typical figure is the median: half the homes used less. The district is BA6.
Council tax
What each band costs in Somerset in 2026-27: Band D £2,561 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,707 | £1,992 | £2,276 | £2,561 | £3,130 | £3,699 | £4,268 | £5,121 |
Homes by band in the neighbourhood around this street: most are in band E (20% of about 1,180 homes).
Planning and heritage
- Conservation area: no postcode centre in this street's postcodes is in one.
- Listed buildings on or by this street: 1.
- Article 4 direction (removing permitted development rights): none recorded, though not every council has published theirs.
- Tree preservation orders: none recorded, though not every council has published theirs.
- Green belt: no.
Listed buildings
Energy projects nearby
3 energy projects near the street's postcodes.
| Project | Kind | Size | Stage | Distance |
|---|---|---|---|---|
| PARK WOOD SOLAR FARM Somerset 2011/0781 | Solar farm | 5 MW | Operational Sep 2011 | 1.4 km (0.8 miles) |
| Higher Hill Farm (extension) Somerset 2014/0646/FUL | Solar farm | 1.5 MW | Operational May 2016 | 1.8 km (1.1 miles) |
| Higher Hill Farm Somerset 2011/0688 | Solar farm | 5 MW | Operational Sep 2011 | 1.9 km (1.2 miles) |
Planned projects can change or not go ahead; search the planning authority's applications by the reference shown for the plans, conditions and any objections. Construction brings traffic for some months; once built, solar farms and batteries are usually quiet, while turbines and waste plants can be seen or heard further away.
Roadworks
Finished in the last three months
- 30 October 2026: Somerset Council, Highway repair and maintenance works, road closure, on the footway, carriageway, footpath (immediate - urgent works)
- 7 October 2026: Royal Mail Property & Facilities Solutions, Highway repair and maintenance works, no carriageway incursion, on the verge (minor works)
- 8 September 2026: Somerset Council, Highway repair and maintenance works, temp obstruction 15 minute delay, on the footway, carriageway, footpath (immediate - urgent works)
- 7 September 2026: Somerset Council, Highway repair and maintenance works, temp obstruction 15 minute delay, on the footway, carriageway, footpath (immediate - urgent works)
- 3 September 2026: Somerset Council, Highway repair and maintenance works, give and take, on the footway, carriageway, footpath (immediate - urgent works)
- 28 August 2026: Somerset Council, Highway repair and maintenance works, give and take, on the footway, carriageway, footpath (immediate - urgent works)
- 10 August 2026 to 11 August 2026: National Grid Electricity Distribution (South West), Utility asset works, temp obstruction 15 minute delay, on the carriageway (minor works)
Flood risk
No address in this street's postcodes is in an area at high, medium or low risk of flooding from rivers, the sea or surface water. The rest are in areas at very low risk: less than a 0.1% (1 in 1,000) chance a year.
Rivers and the sea alone: no home is in an area at risk.
High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. Very low: under 0.1%. The rivers and sea figures allow for flood defences. Counts cover whole postcodes, which can include other streets.
Flood zone for planning: no postcode centre on this street is in flood zone 2 or 3.
Recorded floods
No recorded flood covers the centre of any of this street's postcodes.
Recorded floods are where floodwater was seen or surveyed after a flood. Many floods were never mapped, an outline over a postcode's centre does not mean every home in it flooded, and homes outside one may have. Ask the seller whether the home itself has flooded.
Coastal erosion
No projected coastal erosion zone is within 1 km (0.6 miles) of the street's postcodes.
Storm overflows
No storm overflow outlet is within 1 km (0.6 miles) of the street's postcodes.
Coal mining
No postcode centre on the street is in a coalfield: the Mining Remediation Authority records no coal mining risk here.
Radon
The highest radon potential in the 1 km squares around the street's postcodes is 10 to 30%: up to that share of homes there is estimated to be at or above the Action Level of 200 becquerels per cubic metre. At least part of that area is a radon Affected Area, where 1% or more of homes are.
By postcode centre: 1 to 3% (2); 10 to 30% (2).
Radon is a natural radioactive gas from the ground that can build up indoors; long exposure raises the risk of lung cancer. A three-month test with two small detectors is the only way to know a home's level, and a high level can usually be brought down with a sump or better ventilation. Homes built here in recent decades should have radon protection under the building regulations (basic protection from 3%, full protection from 10%). UKHSA sells a radon report for a single address from its detailed map at ukradon.org.
Historic landfill
No historic landfill site is within 500 m (0.3 miles) of the street's postcodes.
Height above sea level
The street's 58 addresses are between 23 m and 43 m above sea level (34 m on average); the ground rises about 19 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| BA6 8TH | 5% | 0% | 0% | 0% |
| BA6 8TL | 0% | 0% | 0% | 13% |
| BA6 8TQ | 50% | 0% | 0% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway station | Castle Cary 355,000 journeys in 2024–25 | 11.3 km (7 miles) |
| Bus stops | 4 stops within 400 m (0.2 miles), 8 within 800 m (0.5 miles); nearest Rose & Portcullis Inn Butleigh | 180 m |
| Bus or coach station | Coach Park Street | 5.5 km (3.4 miles) |
| EV charging points | Osprey Charging Station | 5.2 km (3.2 miles) |
| Airport with scheduled flights | Bristol Airport BRS | 32 km (20 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | Vine Surgery Partnership Good Dec 2018 | 5.1 km (3.1 miles) |
| Pharmacies | Boots | 5.1 km (3.1 miles) |
| NHS dentists | Adp Dental Company LTD | 5.1 km (3.1 miles) |
| Hospital | Butleigh Hospital | 260 m |
| Care homes | Castle House Nursing Home Limited Outstanding Feb 2020 | 3.6 km (2.2 miles) |
| Police station | Street Police Station | 5.4 km (3.4 miles) |
| Cash machines | 1 machine within 800 m (0.5 miles); nearest Radstock Co-op - Glastonbury | 400 m (0.2 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | Stocks Green 1,200 m² | 2.3 km (1.4 miles) |
| Play area | 1 within 800 m (0.5 miles); nearest Unnamed 3,330 m² | 300 m |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 1.4 ha | 660 m (0.4 miles) |
| Allotments | Unnamed 1,020 m² | 2.5 km (1.6 miles) |
Landmarks
The nearest historic landmark is Bridge Farmhouse, a listed building (Grade II*), 520 m (0.3 miles) north. 31 listed buildings are within 1 km (0.6 miles), 2 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| Bridge Farmhouse | Listed building, Grade II* | 520 m (0.3 miles) north |
| Church of St Leonard | Listed building, Grade II* | 810 m (0.5 miles) north |
| Medieval farmstead, E of Butleigh Wood | Scheduled monument | 1.5 km (1 mile) west |
| Linear earthwork in Butleigh Wood | Scheduled monument | 1.7 km (1.1 miles) west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Rocke's Plantation | Wood | 920 m (0.6 miles) west |
| Butleigh Hill | Hill | 920 m (0.6 miles) south |
| Park Wood | Wood | 1.1 km (0.7 miles) north-east |
| Porters Hill | Hill | 1.3 km (0.8 miles) north-east |
| Catwell Wood | Wood | 1.7 km (1.1 miles) north-west |
| Longroves Reservoir | Lake or reservoir | 1.9 km (1.2 miles) south-west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 3.9 | 40 | 10 |
| Fine particles (PM2.5) | 5.4 | 20 | 5 |
| Particles (PM10) | 9.2 | 40 | 15 |
All three are within the UK legal limits; PM2.5 is above the WHO guideline, as in most towns and cities.
Road and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 60 to 64 | 1 | 0 |
| 55 to 59 | 5 | 0 |
| Under 55 | 51 | 57 |
6 of the street's 57 addresses are modelled at 55 dB or more from road traffic, above the WHO guidelines.
Climate, daylight and earthquakes
Monthly temperatures and rainfall, sunrise and sunset through the year, and earthquakes recorded nearby since 1970 are much the same across the area, so they are worked out once for Somerset: see them on the Somerset page.
Nearest schools
| School | Phase | Ages | Distance | Inspection | Exam results |
|---|---|---|---|---|---|
| Butleigh Church of England Primary School | Primary | 2–11 | 620 m (0.4 miles) | Good (Jun 2023, overall grade under the previous framework) | None published |
Exam results are from the Department for Education's school performance tables (Explore Education Statistics, Open Government Licence), for all pupils at each school. The middle school in England had 63% at the expected standard at the end of primary school (2025), Attainment 8 of 46.0 at GCSE (2026) and an A level average of C+ (2025). Attainment 8 adds up a pupil's grades in eight GCSEs, with English and maths counted twice (90 is the most), averaged over the school's pupils. Progress 8 compares pupils with others who had the same results at the end of primary school; it is not published for GCSEs in 2025 and 2026, as those pupils sat no primary tests during the pandemic. Small year groups swing from year to year, and figures for very small ones are withheld.
Nurseries and childcare
No nursery, pre-school or out-of-school club on Ofsted's register is within 1.5 km (0.9 miles) of the middle of the street.
Ofsted also registers 180 childminders and 43 home childcarers (nannies) in Somerset. It does not publish their addresses, so they cannot be shown here; the council's family information service lists those taking children.
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Sourdown Farm Shop BA6 8TQ | Retailers - other | 320 m | 5 Very good | 17 May 2022 |
| Coop Cafe @ Sourdown BA6 8TQ | Restaurant/Cafe/Canteen | 320 m | 3 Generally satisfactory | 20 Nov 2025 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 1 |
| Other crime | 1 |
| Other theft | 1 |
Most of these are attached to: On or near Kingweston Road (3).
Road safety
No collisions in which someone was hurt were reported on and around the street in 2021 to 2025.
Only collisions in which someone was hurt and which the police were told about are here: damage-only collisions and near misses are not, and some injuries are never reported. Positions are recorded by the police, usually to within a few metres. Each year's figures are published the following September.
Traffic on nearby roads
No traffic count point is within 500 m (0.3 miles) of the street's postcodes. The Department for Transport counts every motorway and A road and only a sample of minor roads, so a quiet residential street usually has none.
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 51 | 40 |
| Children under 15 | 15% | 17% |
| Aged 65 and over | 23% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 83% | 61% |
| Owned outright | 49% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 1% | 17% |
| Private rented | 16% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 57% | 57% |
| Unemployment (of those working or looking for work) | 1% | 6% |
| Retired (of adults) | 29% | 22% |
| Long-term sick or disabled (of adults) | 1% | 4% |
| Work mainly from home (of those in work) | 45% | 32% |
| Travel to work by car or van | 50% | 48% |
| By train, Underground, metro or tram | 1% | 4% |
| By any public transport, including bus | 1% | 8% |
| On foot or by bicycle | 4% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 44% | 65% |
| Work 30 km (19 miles) or more away | 12% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 45% | 34% |
| No qualifications | 12% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 99% | 91% |
| Cannot speak English well or at all | 0% | 2% |
Deprivation
The neighbourhood around this street is in decile 6 of 10 on the English Indices of Deprivation 2025, where 1 is the most deprived tenth of England's 33,755 neighbourhoods and 10 the least.
What has changed
- Roadworks Street works permit: Somerset Council: Highway repair and maintenance works, 30 October 2026 (road closure) found 3 November 2026
Postcodes on this street
- BA6 8TL: 29 addresses of 33 in the postcode
- BA6 8TH: 27 addresses
- BA6 8TQ: 1 address of 4 in the postcode
Nearby streets
Holm Oaks · Harepits Lane · Henley Lane · Holman's · Adams Orchard · Parkfields Orchard · High Street · Holm Oaks
What this page cannot tell you
- Whether a particular house is at risk of flooding, subsiding or anything else: the flood map is a model of areas and there is no property-level data here.
- What a home is worth now: sales are historic prices for the homes that happened to sell.
- How safe the street is: crime points are moved to anonymised locations and many crimes are never reported; road collisions count only those in which someone was hurt and the police were told.
- Whether you would get a place at a school: distances are straight lines, not catchments.
- Who lives on the street now: census figures describe the small areas around it in March 2021, during a lockdown.
- How long a journey takes or how often anything runs: transport distances are straight lines to the nearest stops.
- Whether a GP practice is taking new patients, or a dentist new NHS patients.
- How loud a home is inside, or noise from industry, neighbours or smaller airfields: noise figures are models of road, rail and air traffic outside.
How each figure on this page is matched to the street and worked out: methodology.