Britannia Road Surbiton, Kingston upon Thames
94 addresses across 6 postcodes (KT5), about 200 m long, classed as a local road. USRN 21800168.
- Sales: 69 recorded sales since 1995; in 2026 the median was £412,500 across 2 sales.
- Energy: 81 homes have an energy certificate (B: 3, C: 53, D: 18, E: 6, 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 Kingston upon Thames costs £2,609 a year in 2026-27.
- Broadband: Gigabit broadband is available to 0% to 100% of premises.
- Transport: The nearest railway station is Surbiton, about 810 m (0.5 miles) away in a straight line.
- Green space: The nearest park or garden, Fishponds Park, is about 180 m away.
- Air: Background air pollution in 2024 was 15.1 µg/m³ of nitrogen dioxide and 8.2 of PM2.5, within UK legal limits.
- Height: Its addresses are 31 to 33 m above sea level.
- Noise: 11 of its 94 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Brunswick Surgery, about 490 m (0.3 miles) away, with 6 practices within 1.6 km (1 mile).
- People: About 910 people lived in the census areas around it in 2021; 39% of households owned their home and 50% of adults held a degree or other higher qualification.
- Crime: 156 crimes were recorded within 250 m between September 2025 and August 2026, most often anti-social behaviour.
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2026 | 2 | £412,500 | £375,000 | £450,000 |
| 2025 | 1 | £530,000 | £530,000 | £530,000 |
| 2024 | 3 | £473,000 | £330,000 | £480,000 |
| 2023 | 2 | £440,000 | £425,000 | £455,000 |
| 2021 | 6 | £491,225 | £335,000 | £525,000 |
| 2020 | 1 | £345,000 | £345,000 | £345,000 |
| 2019 | 1 | £348,000 | £348,000 | £348,000 |
| 2018 | 2 | £421,500 | £393,000 | £450,000 |
| 2017 | 2 | £430,000 | £405,000 | £455,000 |
| 2016 | 1 | £390,000 | £390,000 | £390,000 |
| 2015 | 3 | £380,000 | £342,500 | £492,000 |
| 2013 | 3 | £309,000 | £215,000 | £335,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 10 Jul 2026 | FLAT 2, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £375,000 | Leasehold. |
| 5 Jan 2026 | 24 KT5 8RT | Terraced | £450,000 | |
| 28 Mar 2025 | 38 KT5 8RT | Terraced | £530,000 | |
| 7 Oct 2024 | 30 KT5 8RT | Terraced | £480,000 | |
| 22 Mar 2024 | FLAT 5, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £330,000 | Leasehold. |
| 27 Feb 2024 | 34 KT5 8RT | Terraced | £473,000 | |
| 22 Nov 2023 | 26 KT5 8RT | Terraced | £455,000 | |
| 1 Jun 2023 | FLAT 3, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £425,000 | Leasehold. |
| 1 Oct 2021 | FLAT 1, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £388,000 | Leasehold. |
| 16 Sep 2021 | 32 KT5 8RT | Terraced | £500,000 | |
| 10 Sep 2021 | 12 KT5 8RT | Terraced | £525,000 | |
| 30 Jun 2021 | FLAT 7, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £335,000 | Leasehold. |
| 9 Apr 2021 | 54 KT5 8RT | Terraced | £482,500 | |
| 29 Jan 2021 | 38 KT5 8RT | Terraced | £499,950 | |
| 13 Nov 2020 | FLAT 6, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £345,000 | Leasehold. |
| 29 Oct 2019 | FLAT 1, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £348,000 | Leasehold. |
| 4 Sep 2018 | FLAT 3, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £393,000 | Leasehold. |
| 9 May 2018 | 10 KT5 8RT | Terraced | £450,000 | |
| 26 May 2017 | 38 KT5 8RT | Terraced | £455,000 | |
| 31 Mar 2017 | 32 KT5 8RT | Terraced | £405,000 | |
| 10 Mar 2017 | 2 KT5 8RT | Semi-detached | £450,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 8 Jan 2016 | FLAT 3, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £390,000 | Leasehold. |
| 15 Oct 2015 | 34 KT5 8RT | Terraced | £380,000 | |
| 3 Jul 2015 | 54 KT5 8RT | Terraced | £492,000 | |
| 9 Jan 2015 | 48 KT5 8RT | Terraced | £342,500 | |
| 16 May 2014 | 42 KT5 8RT | Terraced | £275,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 12 Jul 2013 | 40 KT5 8RT | Terraced | £215,000 | |
| 29 Apr 2013 | 38 KT5 8RT | Terraced | £335,000 | |
| 8 Mar 2013 | 10 KT5 8RT | Terraced | £309,000 | |
| 14 Apr 2010 | FLAT 2, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,950 | Leasehold. |
| 16 Oct 2008 | 58 KT5 8RT | Terraced | £248,500 | |
| 30 Oct 2007 | 34 KT5 8RT | Terraced | £270,000 | |
| 30 Jul 2007 | 28 KT5 8RT | Terraced | £282,500 | |
| 21 Sep 2006 | 38 KT5 8RT | Terraced | £225,000 | |
| 5 Sep 2006 | FLAT 8, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,950 | New build. Leasehold. |
| 11 Aug 2006 | FLAT 2, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,950 | New build. Leasehold. |
| 4 Aug 2006 | FLAT 6, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,950 | New build. Leasehold. |
| 2 Aug 2006 | FLAT 9, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £280,000 | New build. Leasehold. |
| 12 Jul 2006 | FLAT 7, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £244,000 | New build. Leasehold. |
| 30 Jun 2006 | FLAT 5, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,950 | New build. Leasehold. |
| 28 Jun 2006 | FLAT 1, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £249,999 | New build. Leasehold. |
| 31 May 2006 | FLAT 3, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £247,250 | New build. Leasehold. |
| 31 May 2006 | FLAT 4, CONSERO COURT, 51 KT5 8TT | Flat or maisonette | £247,000 | New build. Leasehold. |
| 11 Apr 2006 | 54 KT5 8RT | Semi-detached | £250,000 | |
| 1 Feb 2006 | 32 KT5 8RT | Terraced | £208,000 | |
| 30 Aug 2005 | 30 KT5 8RT | Terraced | £174,950 | |
| 24 Jun 2005 | 2 KT5 8RT | Semi-detached | £250,000 | |
| 5 Oct 2004 | 34 KT5 8RT | Terraced | £205,000 | |
| 7 Jul 2004 | 24 KT5 8RT | Terraced | £183,500 | |
| 27 Feb 2004 | 14 KT5 8RT | Terraced | £220,000 |
Energy performance certificates
81 homes with a current certificate; median floor area 60 m². Most common: Flat (55); House, mid-terrace (14); House, end-terrace (11). Built: 1967-1975 (50); 1950-1966 (17); 2003-2006 (6). Tenure at assessment: rented (social) (44); owner-occupied (25); rented (private) (10).
Each home's certificates and sales (21 addresses)
- 1 Calder Court, 7, Britannia Road
- 2, Britannia Road
- 5 Calder Court, 7, Britannia Road
- 9 Calder Court, 7, Britannia Road
- 10, Britannia Road
- 12 Calder Court, 7, Britannia Road
- 14, Britannia Road
- 15 Calder Court, 7, Britannia Road
- 18 Calder Court, 7, Britannia Road
- 23 Calder Court, 7, Britannia Road
- 24 Calder Court, 7, Britannia Road
- 24, Britannia Road
- 26, Britannia Road
- 28, Britannia Road
- 32, Britannia Road
- 34, Britannia Road
- 46, Britannia Road
- 50, Britannia Road
- Flat 6 Consero Court, 51, Britannia Road
- Flat 7 Consero Court, 51, Britannia Road
- Flat 8 Consero Court, 51, Britannia Road
Council tax
What each band costs in Kingston upon Thames in 2026-27: Band D £2,609 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,739 | £2,029 | £2,319 | £2,609 | £3,189 | £3,769 | £4,349 | £5,218 |
Homes by band in the neighbourhoods around this street: most are in band C (49% of about 1,700 homes).
Planning and heritage
- Conservation area: yes, FISHPONDS PARK CONSERVATION AREA. Extensions, demolition, some windows and doors, and work on trees need consent.
- 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)
- Land To The Rear Of 22-24 The Avenue, Surbiton, permissioned (110 m)
- 160 Ewell Road, Surbiton, permissioned (360 m)
- 106 Ewell Road, Surbiton, permissioned (370 m)
- Former Oakhill Health Centre, 3 Oakhill, Surbiton, permissioned (530 m (0.3 miles))
- 10 St Marks Hill, Surbiton, permissioned (770 m (0.5 miles))
- Surbiton Station Car Park, Glenbuck Road, Kingston upon Thames, not permissioned (790 m (0.5 miles))
- 374 Ewell Road, Surbiton, permissioned (890 m (0.6 miles))
Roadworks
Finished in the last three months
- 14 October 2026 to 16 October 2026: BT, Utility asset works, no carriageway incursion, on the footway (minor works)
- 7 September 2026: ROYAL BOROUGH OF KINGSTON UPON THAMES, Highway repair and maintenance works, no carriageway incursion, on the footway (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.
Height above sea level
The street's 94 addresses are between 31 m and 33 m above sea level (32 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| KT5 8PR | 100% | 100% | 100% | 0% |
| KT5 8RT | 100% | 100% | 100% | 0% |
| KT5 8ST | 100% | 100% | 100% | 0% |
| KT5 8TR | 100% | 4% | 4% | 0% |
| KT5 8TS | 100% | 100% | 100% | 0% |
| KT5 8TT | 100% | 0% | 0% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Surbiton 7.6 million journeys in 2024–25 | 810 m (0.5 miles) |
| Berrylands 364,000 journeys in 2024–25 | 1.4 km (0.8 miles) | |
| Tolworth 576,000 journeys in 2024–25 | 1.7 km (1.1 miles) | |
| Bus stops | 4 stops within 400 m (0.2 miles), 27 within 800 m (0.5 miles); nearest Browns Road Surbiton | 340 m |
| Bus or coach station | Cromwell Road Bus Station Kingston Upon Thames | 2.6 km (1.6 miles) |
| Ferry terminal | Kingston Town End Pier Kingston Upon Thames | 2 km (1.3 miles) |
| Car parks | 1 within 800 m (0.5 miles); nearest Ewell Road, Surbiton Car Park | 650 m (0.4 miles) |
| EV charging points | 37 within 1.6 km (1 mile); nearest Shell Recharge Charging Station | 110 m |
| Airport with scheduled flights | London Heathrow Airport LHR | 14.7 km (9.1 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 6 practices within 1.6 km (1 mile); nearest Brunswick Surgery | 490 m (0.3 miles) |
| Pharmacies | 9 pharmacies within 1.6 km (1 mile); nearest Shan Pharmacy | 350 m |
| NHS dentists | 10 practices within 1.6 km (1 mile); nearest Surbiton Health Centre (Oakfield) | 490 m (0.3 miles) |
| Hospital | The Lodge (Surbiton Hospital) | 490 m (0.3 miles) |
| Police station | Surbiton Police Station | 570 m (0.4 miles) |
| Cash machines | 1 machines within 800 m (0.5 miles); nearest Londis Cashzone | 430 m (0.3 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 4 within 800 m (0.5 miles); nearest Fishponds Park 4.9 ha | 180 m |
| Play area | 1 within 800 m (0.5 miles); nearest Unnamed 1,550 m² | 340 m |
| Playing field | 1 within 800 m (0.5 miles); nearest Alexandra Recreation Ground 6.2 ha | 350 m |
| Allotments | Tolworth Main Allotments 4.7 ha | 820 m (0.5 miles) |
Within 800 m (0.5 miles): 4 parks and gardens, 8.7 hectares in all.
Landmarks
The nearest historic landmark is Hampton Court, a registered park or garden (Grade I), 2.5 km (1.5 miles) north-west. 16 listed buildings are within 1 km (0.6 miles).
| Name | What it is | From the middle of the street |
|---|---|---|
| Hampton Court | Registered park or garden, Grade I | 2.5 km (1.5 miles) north-west |
| Royal Botanic Gardens, Kew | World Heritage Site | 9.8 km (6.1 miles) north |
| Name | What it is | From the middle of the street |
|---|---|---|
| The Wood | Wood | 650 m (0.4 miles) west |
| Ravens Ait | Island | 1.6 km (1 mile) north-west |
| The Rick Pond | Lake or reservoir | 2 km (1.2 miles) north-west |
| The Creek | Lake or reservoir | 2.4 km (1.5 miles) north-west |
| Dark Hill | Hill | 3.8 km (2.4 miles) north |
| Ham Bottom | Valley | 4.9 km (3.1 miles) north |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 15.1 | 40 | 10 |
| Fine particles (PM2.5) | 8.2 | 20 | 5 |
| Particles (PM10) | 12.7 | 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, rail and aircraft noise
| Level | Road traffic | Railways | Aircraft |
|---|---|---|---|
| 55 to 59 | 11 | 0 | 0 |
| Under 55 | 83 | 94 | 94 |
11 of the street's 94 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 Kingston upon Thames: see them on the Kingston upon Thames page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Surbiton Hill Nursery School | Nursery | 2–5 | 130 m | No published inspection |
| St Matthew's CofE Primary School Church of England | Primary | 5–11 | 470 m (0.3 miles) | No published inspection |
| Lime Tree Primary School | Primary | 4–11 | 540 m (0.3 miles) | Good (Feb 2023, overall grade under the previous framework) |
| Christ Church CofE Primary School Church of England | Primary | 5–11 | 550 m (0.3 miles) | No published inspection |
| Tolworth Junior School | Primary | 7–11 | 840 m (0.5 miles) | No overall grade (Dec 2024, graded inspection without an overall judgement): Quality of education: Outstanding; Behaviour and attitudes: Outstanding; Personal development: Outstanding; Leadership and management: Outstanding |
| Tolworth Infant and Nursery School | Primary | 2–7 | 840 m (0.5 miles) | Outstanding (Dec 2023, overall grade under the previous framework) |
| The Hollyfield School and Sixth Form Centre | Secondary | 11–18 | 890 m (0.6 miles) | No published inspection |
| Our Lady Immaculate Catholic Primary School Roman Catholic | Primary | 4–11 | 1 km (0.6 miles) | No published inspection |
| St Andrew's and St Mark's CofE Junior School Church of England | Primary | 7–11 | 1.1 km (0.7 miles) | Report card (Apr 2026): Curriculum and teaching: Strong standard; Achievement: Strong standard; Attendance and behaviour: Strong standard; Personal development and wellbeing: Strong standard; Inclusion: Strong standard; Leadership and governance: Strong standard; Safeguarding standards: Met |
| Maple Infants' School | Primary | 3–7 | 1.1 km (0.7 miles) | No published inspection |
| Grand Avenue Primary and Nursery School | Primary | 3–11 | 1.2 km (0.7 miles) | Report card (Mar 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Strong standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met |
| Southborough High School | Secondary | 11–18 | 1.7 km (1 mile) | Good (Feb 2023, overall grade under the previous framework) |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Food Fare KT5 8ST | Retailers - other | 160 m | 2 Improvement necessary | 10 Jul 2026 |
| Surbitonian Gardens KT5 8FF | Hospitals/Childcare/Caring Premises | 210 m | 4 Good | 9 Jan 2026 |
| The Prince Of Wales KT6 6AL | Pub/bar/nightclub | 300 m | 5 Very good | 27 Mar 2026 |
| Vitto Kitchens KT6 6AL | Pub/bar/nightclub | 300 m | 3 Generally satisfactory | 27 Mar 2026 |
| Sainsbury's KT6 6AW | Retailers - supermarkets/hypermarkets | 300 m | 5 Very good | 12 Feb 2024 |
| Bamanoosh KT6 6AW | Restaurant/Cafe/Canteen | 310 m | 3 Generally satisfactory | 21 Jan 2026 |
| Positano KT6 6AW | Restaurant/Cafe/Canteen | 310 m | 5 Very good | 14 Oct 2025 |
| Maruzzella Restaurant KT6 6AL | Restaurant/Cafe/Canteen | 310 m | 4 Good | 11 Aug 2025 |
| Oniseh Persian Cuisine KT6 6AL | Restaurant/Cafe/Canteen | 310 m | 4 Good | 9 Jan 2026 |
| Nawab To Go KT6 6AL | Takeaway/sandwich shop | 310 m | 4 Good | 9 Jan 2026 |
| Air Charter Service Limited KT6 6AP | Other catering premises | 310 m | 5 Very good | 2 Sep 2025 |
| Black Swan Cafe KT6 6AW | Restaurant/Cafe/Canteen | 310 m | 5 Very good | 21 Jan 2026 |
| Surbiton Methodist Tennis Club KT5 8NE | Pub/bar/nightclub | 320 m | 5 Very good | 17 Dec 2025 |
| Elysium Care Partnerships Limited KT6 6AH | Hospitals/Childcare/Caring Premises | 330 m | 5 Very good | 10 Jul 2026 |
| Munchies KT6 6HE | Restaurant/Cafe/Canteen | 330 m | 5 Very good | 28 Sep 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Anti-social behaviour | 53 |
| Violence and sexual offences | 44 |
| Vehicle crime | 25 |
| Burglary | 9 |
| Other theft | 9 |
| Drugs | 5 |
| Public order | 5 |
| Criminal damage and arson | 4 |
| Robbery | 1 |
| Bicycle theft | 1 |
Most of these are attached to: On or near South Place (25); On or near The Retreat (19); On or near Adams Close (19); On or near Middle Green Close (18); On or near Alpha Road (15).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 38 | 40 |
| Children under 15 | 16% | 17% |
| Aged 65 and over | 16% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 39% | 61% |
| Owned outright | 12% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 36% | 17% |
| Private rented | 25% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 61% | 57% |
| Unemployment (of those working or looking for work) | 6% | 6% |
| Retired (of adults) | 18% | 22% |
| Long-term sick or disabled (of adults) | 5% | 4% |
| Work mainly from home (of those in work) | 52% | 32% |
| Travel to work by car or van | 20% | 48% |
| By train, Underground, metro or tram | 9% | 4% |
| By any public transport, including bus | 16% | 8% |
| On foot or by bicycle | 11% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 68% | 65% |
| Work 30 km (19 miles) or more away | 2% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 50% | 34% |
| No qualifications | 15% | 18% |
| Apprenticeship as highest qualification | 3% | 5% |
| Main language English (aged 3 and over) | 86% | 91% |
| Cannot speak English well or at all | 3% | 2% |
Deprivation
The 2 neighbourhoods around this street are in deciles 3 to 8 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: Utility asset works, 14 October 2026 to 16 October 2026 (no carriageway incursion) found 3 November 2026
Postcodes on this street
- KT5 8RT: 32 addresses
- KT5 8TR: 25 addresses
- KT5 8TS: 25 addresses of 26 in the postcode
- KT5 8TT: 10 addresses
- KT5 8PR: 1 address of 6 in the postcode
- KT5 8ST: 1 address of 35 in the postcode
Nearby streets
Christ Church Road · Alpha Road · Progress Mews · King Charles Crescent · Middle Green Close · The Retreat · Mayberry Place · The Avenue · Adams Close · Hobill Walk · Brown's Road · Brown's Road
All the streets in KT5 and across Kingston upon Thames.
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.