Stockbreach Close Hatfield
103 addresses across 4 postcodes (AL10), about 510 m (0.3 miles) long, classed as a local road. USRN 43016339.
- Sales: 53 recorded sales since 1995; in 2025 the median was £261,873 across 2 sales.
- Energy: 93 homes have an energy certificate (C: 67, D: 25, G: 1).
- Flood: No address on its postcodes is in an area at high or medium risk of flooding from rivers, the sea or surface water.
- Council tax: Most homes around it are in council tax band C; Band D in Welwyn Hatfield costs £2,452 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Hatfield (Herts), about 1.1 km (0.7 miles) away in a straight line.
- Green space: The nearest park or garden, Coronation Gardens, is about 490 m (0.3 miles) away.
- Air: Background air pollution in 2024 was 11.7 µg/m³ of nitrogen dioxide and 7.6 of PM2.5, within UK legal limits.
- Height: Its addresses are 81 to 82 m above sea level.
- Noise: 1 of its 103 addresses is modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Lister House Surgery, about 340 m away, with 3 practices within 1.6 km (1 mile).
- People: About 860 people lived in the census areas around it in 2021; 16% of households owned their home and 29% of adults held a degree or other higher qualification.
- Crime: 373 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2025 | 2 | £261,873 | £175,000 | £348,745 |
| 2020 | 1 | £380,000 | £380,000 | £380,000 |
| 2019 | 1 | £170,000 | £170,000 | £170,000 |
| 2016 | 3 | £251,000 | £198,000 | £275,000 |
| 2015 | 2 | £267,445 | £255,000 | £279,890 |
| 2014 | 3 | £213,000 | £160,000 | £267,000 |
| 2013 | 4 | £172,475 | £117,000 | £192,000 |
| 2011 | 2 | £179,500 | £174,000 | £185,000 |
| 2010 | 1 | £195,000 | £195,000 | £195,000 |
| 2009 | 2 | £181,500 | £143,000 | £220,000 |
| 2007 | 3 | £138,000 | £110,000 | £157,000 |
| 2006 | 2 | £188,500 | £165,000 | £212,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 1 Oct 2025 | 33 AL10 0AZ | Flat or maisonette | £180,000 | Leasehold. Not a standard sale (repossession, buy-to-let or transfer). |
| 17 Jul 2025 | FLAT, 19 AL10 0AZ | Flat or maisonette | £175,000 | Leasehold. |
| 20 Mar 2025 | 11 AL10 0AZ | Semi-detached | £348,745 | |
| 15 Jun 2020 | 1 AL10 0AZ | Detached | £380,000 | Leasehold. |
| 25 Jul 2019 | FLAT, 37 AL10 0AZ | Flat or maisonette | £170,000 | Leasehold. |
| 1 Sep 2016 | 59 AL10 0AZ | Terraced | £275,000 | |
| 4 Mar 2016 | 30 AL10 0BA | Flat or maisonette | £198,000 | Leasehold. |
| 21 Jan 2016 | 9 AL10 0AZ | Semi-detached | £251,000 | |
| 9 Nov 2015 | 50 AL10 0BA | Terraced | £279,890 | |
| 21 Oct 2015 | 48 AL10 0BA | Terraced | £255,000 | |
| 17 Jun 2014 | 5B AL10 0AZ | Semi-detached | £209,950 | Not a standard sale (repossession, buy-to-let or transfer). |
| 6 Jun 2014 | 2 AL10 0AX | Detached | £267,000 | |
| 9 May 2014 | 65 AL10 0AZ | Terraced | £213,000 | |
| 8 Apr 2014 | 32 AL10 0BA | Flat or maisonette | £160,000 | Leasehold. |
| 20 Dec 2013 | 7 AL10 0AZ | Semi-detached | £179,950 | |
| 31 Oct 2013 | 57 AL10 0AZ | Flat or maisonette | £192,000 | |
| 14 Jun 2013 | FLAT, 73 AL10 0AZ | Flat or maisonette | £117,000 | Leasehold. |
| 11 Jan 2013 | 34 AL10 0BA | Flat or maisonette | £165,000 | Leasehold. |
| 25 Oct 2011 | 9 AL10 0AZ | Semi-detached | £185,000 | |
| 5 Jan 2011 | 59 AL10 0AZ | Terraced | £174,000 | |
| 17 Mar 2010 | 5B AL10 0AZ | Semi-detached | £195,000 | |
| 21 Dec 2009 | 32 AL10 0BA | Flat or maisonette | £143,000 | Leasehold. |
| 23 Mar 2009 | 2 AL10 0AX | Semi-detached | £220,000 | |
| 1 Oct 2007 | 57 AL10 0AZ | Terraced | £138,000 | |
| 20 Sep 2007 | 36 AL10 0BA | Flat or maisonette | £157,000 | Leasehold. |
| 5 Feb 2007 | FLAT, 37 AL10 0AZ | Flat or maisonette | £110,000 | Leasehold. |
| 30 Nov 2006 | 16 AL10 0BA | Flat or maisonette | £165,000 | Leasehold. |
| 11 Apr 2006 | 50 AL10 0BA | Terraced | £212,000 | |
| 4 May 2004 | 9 AL10 0AZ | Semi-detached | £170,000 | |
| 3 Feb 2004 | 3 AL10 0AZ | Semi-detached | £250,000 | Leasehold. |
| 29 Aug 2003 | 65 AL10 0AZ | Terraced | £149,000 | |
| 29 Nov 2002 | 7 AL10 0AZ | Semi-detached | £135,050 | |
| 22 Nov 2002 | 8 AL10 0BA | Flat or maisonette | £129,000 | Leasehold. |
| 13 Nov 2002 | 48 AL10 0BA | Terraced | £159,000 | |
| 16 Aug 2002 | 44 AL10 0BA | Terraced | £156,000 | |
| 31 May 2002 | 16 AL10 0BA | Flat or maisonette | £99,995 | Leasehold. |
| 5 Nov 2001 | FLAT, 73 AL10 0AZ | Flat or maisonette | £30,000 | Leasehold. |
| 28 Aug 2001 | 11 AL10 0AZ | Semi-detached | £85,000 | |
| 12 Apr 2001 | 65 AL10 0AZ | Terraced | £93,000 | |
| 1 Sep 2000 | 44 AL10 0BA | Terraced | £128,000 | |
| 17 Mar 2000 | 34 AL10 0BA | Flat or maisonette | £78,000 | Leasehold. |
| 17 Sep 1999 | 26 AL10 0BA | Flat or maisonette | £79,995 | Leasehold. |
| 31 Mar 1999 | 50 AL10 0BA | Terraced | £38,000 | |
| 16 Oct 1998 | 14 AL10 0BA | Flat or maisonette | £65,000 | Leasehold. |
| 17 Jul 1998 | 42 AL10 0BA | Flat or maisonette | £62,800 | Leasehold. |
| 29 May 1998 | 65 AL10 0AZ | Terraced | £67,500 | |
| 16 Jan 1998 | 26 AL10 0BA | Flat or maisonette | £67,000 | Leasehold. |
| 16 Dec 1997 | 61 AL10 0AZ | Terraced | £65,000 | |
| 20 Oct 1997 | 9 AL10 0AZ | Semi-detached | £55,000 | |
| 3 Oct 1997 | 7 AL10 0AZ | Semi-detached | £58,000 |
Energy performance certificates
93 homes with a current certificate; median floor area 45 m². Most common: Flat (55); Maisonette, end-terrace (6); House, mid-terrace (6). Built: 1967-1975 (55); 1950-1966 (23); 1983-1990 (9). Tenure at assessment: rented (social) (57); rented (private) (15); owner-occupied (12).
Each home's certificates and sales (27 addresses)
- 1, Stockbreach Close
- 6, Stockbreach Close
- 7, Stockbreach Close
- 10, Stockbreach Close
- 11, Stockbreach Close
- 12, Stockbreach Close
- 14, Stockbreach Close
- 27, Stockbreach Close
- 28, Stockbreach Close
- 30, Stockbreach Close
- 37, Stockbreach Close
- 42, Stockbreach Close
- 44, Stockbreach Close
- 47, Stockbreach Close
- 48, Stockbreach Close
- 50, Stockbreach Close
- 55 Stockbreach Close
- 57 Stockbreach Close
- 65 Stockbreach Close
- 81, Stockbreach Close
- Flat, 19, Stockbreach Close
- Flat, 51, Stockbreach Close
- Flat, 67, Stockbreach Close
- Maisonette, 52, Stockbreach Close
- Maisonette, 60, Stockbreach Close
- Maisonette, 72, Stockbreach Close
- Maisonette, 96, Stockbreach Close
Council tax
What each band costs in Welwyn Hatfield in 2026-27: Band D £2,452 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,635 | £1,907 | £2,180 | £2,452 | £2,997 | £3,542 | £4,087 | £4,905 |
Homes by band in the neighbourhood around this street: most are in band C (38% of about 970 homes).
Planning and heritage
- Conservation area: no postcode centre in this street's postcodes is in one.
- Listed buildings on or by this street: none.
- 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.
Brownfield land registered for housing within 1 km (0.6 miles)
- Hatfield - Lemsford Road Car Park: up to 32 homes, not permissioned (160 m)
- Hatfield - Meridian House The Common: up to 11 homes, not permissioned (160 m)
- Hatfield - Sylvia Adams House 24 The Common: up to 10 homes, permissioned (270 m)
- Hatfield - 41-43 Town Centre: up to 6 homes, permissioned (360 m)
- Hatfield - L Kahn Manufacturing Wellfield Road: up to 62 homes, not permissioned (440 m (0.3 miles))
- Hatfield - Former Volkswagen Van Centre Comet Way: up to 118 homes, permissioned (450 m (0.3 miles))
- Hatfield - 12 Harpsfield Broadway: up to 6 homes, permissioned (470 m (0.3 miles))
- Hatfield - Link Drive Car Park: up to 80 homes, permissioned (550 m (0.3 miles))
Roadworks
Planned, as of 31 October 2026
- 4 November 2026 to 6 November 2026: BT, Utility repair and maintenance works, no carriageway incursion, on the verge, footpath (minor works, permit applied for)
Finished in the last three months
- 29 October 2026: BT, New service connection, some carriageway incursion, on the footway (minor works)
- 23 October 2026: BT, New service connection, some carriageway incursion, on the footway (minor works)
- 1 September 2026: BT, New service connection, no carriageway incursion, on the footway, verge (minor works)
- 22 August 2026: BT, Utility repair and maintenance works, no carriageway incursion, on the verge, footpath (minor works)
- 5 August 2026: Whyfibre Limited, Utility repair and maintenance works, some carriageway incursion, on the footway (minor works)
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 0 addresses are in areas at high risk, 0 at medium risk and 16 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.
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.
| Postcode | Planning zone | Addresses at high / medium / low risk | Groundwater |
|---|---|---|---|
| AL10 0BA | not in 2 or 3 | 0 / 0 / 14 | unlikely |
| AL10 0AZ | not in 2 or 3 | 0 / 0 / 2 | unlikely |
| AL10 0AX | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| AL10 0BB | not in 2 or 3 | 0 / 0 / 0 | unlikely |
Height above sea level
The street's 103 addresses are between 81 m and 82 m above sea level (81 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| AL10 0AX | 100% | 100% | 100% | 0% |
| AL10 0AZ | 100% | 100% | 100% | 0% |
| AL10 0BA | 100% | 100% | 100% | 0% |
| AL10 0BB | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Hatfield (Herts) 2.5 million journeys in 2024–25 | 1.1 km (0.7 miles) |
| Welham Green 253,000 journeys in 2024–25 | 3.4 km (2.1 miles) | |
| Welwyn Garden City 2.5 million journeys in 2024–25 | 4.6 km (2.8 miles) | |
| Bus stops | 13 stops within 400 m (0.2 miles), 39 within 800 m (0.5 miles); nearest Swim Centre Hatfield | 130 m |
| Bus or coach station | Parkhouse Bus Station Hatfield | 490 m (0.3 miles) |
| EV charging points | InstaVolt Charging Station | 3.8 km (2.4 miles) |
| Airport with scheduled flights | London Luton Airport LTN | 15.5 km (9.6 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 3 practices within 1.6 km (1 mile); nearest Lister House Surgery | 340 m |
| Pharmacies | 5 pharmacies within 1.6 km (1 mile); nearest Asda Pharmacy | 320 m |
| NHS dentists | 4 practices within 1.6 km (1 mile); nearest Hatfield Dental Centre | 420 m (0.3 miles) |
| Hospital | One Hatfield Hospital | 830 m (0.5 miles) |
| Police station | Hertfordshire Constabulary | 380 m |
| Cash machines | 5 machines within 800 m (0.5 miles); nearest Asda Hatfield 1 Cashzone | 320 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 1 within 800 m (0.5 miles); nearest Coronation Gardens 1,590 m² | 490 m (0.3 miles) |
| Play area | 6 within 800 m (0.5 miles); nearest Unnamed 690 m² | 340 m |
| Playing field | 3 within 800 m (0.5 miles); nearest Roe Hill Park 5.3 ha | 690 m (0.4 miles) |
| Allotments | 4 within 800 m (0.5 miles); nearest Feather Dell Allotment Garden 810 m² | 370 m |
Within 800 m (0.5 miles): 1 park or garden, 0.2 hectares in all.
Landmarks
The nearest historic landmark is The Flight Test Hangar, Offices, Fire Station and Control Tower, British Aerospace, a listed building (Grade II*), 830 m (0.5 miles) west. 9 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| The Flight Test Hangar, Offices, Fire Station and Control Tower, British Aerospace | Listed building, Grade II* | 830 m (0.5 miles) west |
| Hatfield House | Registered park or garden, Grade I | 2.2 km (1.3 miles) east |
| Name | What it is | From the middle of the street |
|---|---|---|
| Howe Dell | Valley | 1.1 km (0.7 miles) south-east |
| Hazel Grove | Wood | 1.7 km (1.1 miles) south |
| Round Wood | Wood | 2 km (1.3 miles) west |
| Home Covert | Wood | 2.2 km (1.3 miles) west |
| Johnson's Spring | Wood | 2.2 km (1.4 miles) south-west |
| Bunchleys Pond | Lake or reservoir | 2.4 km (1.5 miles) south |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 11.7 | 40 | 10 |
| Fine particles (PM2.5) | 7.6 | 20 | 5 |
| Particles (PM10) | 12.4 | 40 | 15 |
All three are within the UK legal limits; nitrogen dioxide and PM2.5 are above the WHO guideline, as in most towns and cities.
Road and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 55 to 59 | 1 | 0 |
| Under 55 | 102 | 103 |
1 of the street's 103 addresses is 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 Welwyn Hatfield: see them on the Welwyn Hatfield page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Hatfield Community Free School | Primary | 4–11 | 580 m (0.4 miles) | No overall grade (Mar 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Birchwood Nursery School | Nursery | 2–5 | 680 m (0.4 miles) | Outstanding (Feb 2024, overall grade under the previous framework) |
| Bishop's Hatfield Girls' School | Secondary | 11–18 | 700 m (0.4 miles) | No published inspection |
| Birchwood Avenue Primary School | Primary | 5–11 | 760 m (0.5 miles) | Good (Jun 2023, overall grade under the previous framework) |
| St Philip Howard Catholic Primary School Roman Catholic | Primary | 3–11 | 850 m (0.5 miles) | No published inspection |
| Onslow St Audrey's School | Secondary | 11–18 | 900 m (0.6 miles) | Good (Dec 2023, overall grade under the previous framework) |
| Countess Anne Church of England School | Primary | 5–11 | 950 m (0.6 miles) | Outstanding (Oct 2019, overall grade under the previous framework) |
| Oak View Primary and Nursery School | Primary | 3–11 | 1 km (0.6 miles) | No published inspection |
| Howe Dell Primary School | Primary | 3–11 | 1.1 km (0.7 miles) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Green Lanes Primary School | Primary | 5–11 | 1.3 km (0.8 miles) | No published inspection |
| The Ryde School | Primary | 4–11 | 1.7 km (1 mile) | No published inspection |
| De Havilland Primary School | Primary | 3–11 | 1.7 km (1.1 miles) | Good (Sep 2023, overall grade under the previous framework) |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Artisan Chocolaterie-Best cakes in town AL10 0DE | Retailers - other | 90 m | 5 Very good | 29 Nov 2011 |
| Care Tech Community Services Ltd AL10 0NX | Hospitals/Childcare/Caring Premises | 150 m | 5 Very good | 20 Aug 2025 |
| Skippers Fish & Chips AL10 0LU | Takeaway/sandwich shop | 160 m | 5 Very good | 31 Mar 2026 |
| Palmers Newsagents AL10 0LU | Retailers - other | 160 m | Exempt | |
| Hatfield Kebab and Pizza House AL10 0LU | Takeaway/sandwich shop | 160 m | 5 Very good | 9 Sep 2024 |
| Favorite Chicken & Ribs AL10 0LU | Restaurant/Cafe/Canteen | 160 m | 5 Very good | 18 Jun 2026 |
| Subway AL10 0LU | Restaurant/Cafe/Canteen | 160 m | 3 Generally satisfactory | 8 Aug 2025 |
| Pizza Hut AL10 0LU | Restaurant/Cafe/Canteen | 160 m | 5 Very good | 6 Aug 2025 |
| Peri Peri Original AL10 0LU | Takeaway/sandwich shop | 160 m | 5 Very good | 3 Mar 2026 |
| St John of God Hospitaller Services AL10 0AW | Hospitals/Childcare/Caring Premises | 310 m | 5 Very good | 10 Jul 2024 |
| St John of God Hospitaller Services AL10 0AW | Hospitals/Childcare/Caring Premises | 310 m | 5 Very good | 10 Jul 2024 |
| Maz's Cafe and Restaurant AL10 0JW | Restaurant/Cafe/Canteen | 310 m | 5 Very good | 5 Mar 2025 |
| Asda AL10 0JW | Retailers - supermarkets/hypermarkets | 330 m | 4 Good | 30 Jul 2025 |
| Iceland AL10 0JW | Retailers - supermarkets/hypermarkets | 330 m | 5 Very good | 17 Sep 2022 |
| Simmons (Bakers) Ltd AL10 0JW | Retailers - other | 330 m | 5 Very good | 27 May 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 121 |
| Anti-social behaviour | 67 |
| Shoplifting | 38 |
| Criminal damage and arson | 21 |
| Other theft | 21 |
| Vehicle crime | 20 |
| Public order | 20 |
| Drugs | 18 |
| Bicycle theft | 18 |
| Robbery | 10 |
| Burglary | 8 |
| Theft from the person | 6 |
| Possession of weapons | 3 |
| Other crime | 2 |
Most of these are attached to: On or near Supermarket (130); On or near Parking Area (52); On or near Conference/Exhibition Centre (30); On or near St Peters Close (30); On or near The Common (22).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 37 | 40 |
| Children under 15 | 17% | 17% |
| Aged 65 and over | 11% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 16% | 61% |
| Owned outright | 5% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 67% | 17% |
| Private rented | 16% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 62% | 57% |
| Unemployment (of those working or looking for work) | 8% | 6% |
| Retired (of adults) | 12% | 22% |
| Long-term sick or disabled (of adults) | 7% | 4% |
| Work mainly from home (of those in work) | 14% | 32% |
| Travel to work by car or van | 54% | 48% |
| By train, Underground, metro or tram | 3% | 4% |
| By any public transport, including bus | 7% | 8% |
| On foot or by bicycle | 23% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 73% | 65% |
| Work 30 km (19 miles) or more away | 6% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 29% | 34% |
| No qualifications | 27% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 77% | 91% |
| Cannot speak English well or at all | 4% | 2% |
Deprivation
The neighbourhood around this street is in decile 2 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: BT: New service connection, 23 October 2026 to 27 October 2026 (some carriageway incursion) found 3 November 2026
- Roadworks Street works permit: BT: Utility repair and maintenance works, 4 November 2026 to 6 November 2026 (no carriageway incursion) found 3 November 2026
Postcodes on this street
- AL10 0BA: 50 addresses
- AL10 0AZ: 47 addresses
- AL10 0AX: 5 addresses
- AL10 0BB: 1 address of 27 in the postcode
Nearby streets
The Common · Oak Tree Close · Lemsford Road · Ely Close · St Peters Close · De Havilland Close · Middlefield · Fiddle Bridge Lane · Haven Close · Town Centre · Middlefield · Malvern Close
All the streets in AL10 and across Welwyn Hatfield.
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.
- 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.