The Meadows Sedgefield, County Durham

189 addresses across 10 postcodes (TS21), about 760 m (0.5 miles) long, classed as a local road. USRN 33909206.

  • Sales: 105 recorded sales since 1995; in 2026 the median was £279,950 across 1 sale.
  • Energy: 136 homes have an energy certificate (B: 88, C: 10, D: 30, E: 8).
  • Flood: 17 addresses on its postcodes are in areas 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 B; Band D in County Durham costs £2,622 a year in 2026-27.
  • Broadband: Gigabit broadband is available to 100% of premises.
  • Transport: The nearest railway station is Newton Aycliffe, about 9.9 km (6.1 miles) away in a straight line.
  • Green space: The nearest park or garden is about 130 m away.
  • Air: Background air pollution in 2024 was 6.3 µg/m³ of nitrogen dioxide and 5.6 of PM2.5, within UK legal limits.
  • Height: Its addresses are 94 to 103 m above sea level.
  • Noise: 56 of its 189 addresses are modelled at 55 dB or more from road traffic.
  • Doctors: The nearest GP surgery is Skerne Medical Group, about 500 m (0.3 miles) away.
  • People: About 950 people lived in the census areas around it in 2021; 75% of households owned their home and 41% of adults held a degree or other higher qualification.
  • Crime: 21 crimes were recorded within 250 m between September 2025 and August 2026, most often anti-social behaviour.

Sales on this street

Source: HM Land Registry Price Paid Data, sales registered up to 28 August 2026, loaded 28 October 2026. Sales reach the register two weeks to two months after completion, so the last two months are incomplete. Matched by postcode and street name.

Sales by year (standard sales only; repossessions and buy-to-let transfers excluded)
YearSalesMedian priceLowestHighest
20261£279,950£279,950£279,950
20254£250,000£210,000£397,500
20241£290,000£290,000£290,000
20231£190,000£190,000£190,000
20223£195,000£160,000£240,000
20214£209,975£185,000£226,000
20203£190,000£170,000£250,000
20194£162,500£150,000£200,000
20183£162,000£140,000£225,000
20163£247,000£215,000£267,500
20154£222,475£178,000£299,950
20143£175,000£175,000£182,000
Most recent sales (latest 50 of 105)
DateAddressTypePriceNotes
17 Jul 202664 TS21 2DJDetached£279,950
7 Nov 202532 TS21 2DHSemi-detached£225,000
18 Aug 202575 TS21 2DWDetached£210,000
7 Aug 202590 TS21 2DJSemi-detached£397,500
20 Feb 202589 TS21 2DPDetached£275,000Leasehold.
14 Jun 202494 TS21 2DJSemi-detached£290,000
19 Jun 20237 TS21 2DLSemi-detached£190,000
29 Apr 202257 TS21 2DWSemi-detached£195,000
29 Mar 202217 TS21 2DLDetached£240,000
14 Jan 202269 TS21 2DWSemi-detached£160,000
30 Sep 2021100 TS21 2DPSemi-detached£219,950
29 Sep 202168 TS21 2DJSemi-detached£226,000
24 Sep 202130 TS21 2DHSemi-detached£200,000Leasehold.
21 Jun 202136 TS21 2DHSemi-detached£185,000
20 Nov 202086 TS21 2DJSemi-detached£170,000
2 Oct 202083 TS21 2DWSemi-detached£250,000
26 Mar 202051 TS21 2DWSemi-detached£190,000
6 Dec 201961 TS21 2DWSemi-detached£160,000Leasehold.
22 Oct 201933 TS21 2DLSemi-detached£165,000
27 Sep 201941 TS21 2DLDetached£200,000
9 Sep 201969 TS21 2DWSemi-detached£150,000
21 Sep 20183 TS21 2DLSemi-detached£225,000Leasehold.
16 Jul 201870 TS21 2DJSemi-detached£140,000
12 Jul 201832 TS21 2DHSemi-detached£162,000
26 Apr 201674 TS21 2DJDetached£247,000
31 Mar 201664 TS21 2DJDetached£215,000
18 Mar 201642 TS21 2DHDetached£267,500
26 Nov 201552 TS21 2DHDetached£245,000Leasehold.
2 Oct 201555 TS21 2DWDetached£199,950
22 Sep 201558 TS21 2DHSemi-detached£178,000
17 Jul 201546 TS21 2DHDetached£299,950
12 Jun 201490 TS21 2DJSemi-detached£175,000
9 May 201440 TS21 2DHDetached£182,000
17 Jan 201457 TS21 2DWSemi-detached£175,000
20 Sep 20133 TS21 2DLSemi-detached£190,000Leasehold.
17 Jun 201376 TS21 2DJSemi-detached£180,000
17 Jun 201318 TS21 2DHDetached£178,000
7 May 201392 TS21 2DJSemi-detached£177,000
28 Mar 201363 TS21 2DWSemi-detached£132,000
22 Nov 20128 TS21 2DHSemi-detached£208,000
30 Apr 20121 TS21 2DLSemi-detached£188,500
12 May 20115 TS21 2DLSemi-detached£117,000
24 Sep 201076 TS21 2DJSemi-detached£165,000
1 Apr 201013 TS21 2DLSemi-detached£150,000
7 Dec 200965 TS21 2DWSemi-detached£155,000
28 Aug 200915 TS21 2DLSemi-detached£175,000
20 Jun 2008100 TS21 2DPSemi-detached£147,000Leasehold.
20 Jun 2008100 TS21 2DPSemi-detached£147,000
20 Mar 200857 TS21 2DWSemi-detached£170,000
6 Jul 200718 TS21 2DHDetached£208,000

Energy performance certificates

Source: Energy Performance of Buildings Register (MHCLG), register as at 1 November 2026. Latest certificate per address; certificates last ten years, so the oldest here dates from December 2008 and some homes have none. Address data © Ordnance Survey and Royal Mail, shown for understanding the energy efficiency of buildings only.

136 homes with a current certificate; median floor area 109 m². Most common: House, detached (82); House, semi-detached (38); Bungalow, semi-detached (10). Built: 2019 (53); 1967-1975 (30); 1950-1966 (17). Tenure at assessment: owner-occupied (122).

Each home's certificates and sales (53 addresses)

Council tax

What each band costs in County Durham in 2026-27: Band D £2,622 a year on average, including the police, fire and any county and parish charges.

ABCDEFGH
£1,748£2,039£2,331£2,622£3,205£3,788£4,370£5,244

Homes by band in the neighbourhoods around this street: most are in band B (27% of about 1,890 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10; some small counts withheld), for the 2 neighbourhoods (census areas of about 700 homes each) around it, not just this street; Ministry of Housing, Communities and Local Government, council tax levels 2026-27. Bands are charged as fixed shares of Band D; the actual bill depends on the parish and on discounts such as the single-person discount. Check a home's own band with the official council tax band checker.

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.

Source: planning.data.gov.uk (Ministry of Housing, Communities and Local Government), compiled from councils and, for listed buildings, Historic England's National Heritage List. Conservation areas, Article 4 directions, tree preservation areas and the green belt are checked at each postcode's centre. Listed buildings and protected trees are counted on or by this street. Councils publish Article 4 directions, tree preservation orders and brownfield registers to different standards, and some not yet. Planning applications are not here: there is no national open record of them yet.

Roadworks

No street works under way, planned or finished in the last three months on this street, in permits up to 30 September 2026.

Source: Department for Transport, Street Manager open data, permits and works up to 30 September 2026. It is published once a month, so works arranged or started since then are not shown, and dates are the ones planned unless the works have started or finished. Emergency works are often permitted after they begin.

Flood risk

Rivers, the sea or surface water: in this street's postcodes, 7 addresses are in areas at high risk, 10 at medium risk and 14 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.

PostcodePlanning zoneAddresses at high / medium / low riskGroundwater
TS21 2BPnot in 2 or 3 0 / 7 / 10 unlikely
TS21 2DHnot in 2 or 3 0 / 0 / 0 unlikely
TS21 2BQnot in 2 or 3 1 / 0 / 2 unlikely
TS21 2BFnot in 2 or 3 0 / 0 / 0 unlikely
TS21 2DLnot in 2 or 3 0 / 3 / 0 unlikely
TS21 2DWnot in 2 or 3 0 / 0 / 1 unlikely
TS21 2DJnot in 2 or 3 2 / 0 / 0 unlikely
TS21 2BGnot in 2 or 3 1 / 0 / 0 unlikely
TS21 2DPnot in 2 or 3 3 / 0 / 1 unlikely
TS21 2DTnot in 2 or 3 0 / 0 / 0 unlikely

Sources: Environment Agency Flood risk: postcode search tool data (loaded 29 October 2026), Risk of Flooding from Rivers and Sea: postcodes in areas at risk (loaded 29 October 2026) and Flood Map for Planning (loaded 28 October 2026). Flood zones are checked at each postcode's centre point. These are models of areas, which their publishers say are not suitable for showing whether an individual property is at risk, and they do not cover flooding from sewers or drains. Check an address on the official long-term flood risk service.

© Environment Agency copyright and/or database right 2026. All rights reserved. Some features are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH); the postcode data is produced in part from PAF® and Multiple Residence Data, © Royal Mail Group Limited.

Height above sea level

The street's 189 addresses are between 94 m and 103 m above sea level (97 m on average); the ground rises about 9 m from the lowest to the highest.

Source: Ordnance Survey, OS Terrain 50, July 2026: the height of the ground on a 50 m grid, read at each address, in metres above Ordnance Datum (mean sea level at Newlyn). It is the lie of the land, not floor or threshold levels, and is accurate to a few metres. Being low-lying is not in itself a flood risk; the flood section above says what the flood maps show.

Broadband

Source: Ofcom Connected Nations, data as at January 2026. Percentages are of premises in each postcode that can get the service, not take-up or speed achieved.

Availability by postcode (% of premises)
PostcodeSuperfast (30 Mbit/s+)Ultrafast (300 Mbit/s+)GigabitBelow 10 Mbit/s
TS21 2BF100%100%100%0%
TS21 2BG100%100%100%0%
TS21 2BP100%100%100%0%
TS21 2BQ100%100%100%0%
TS21 2DH100%93%100%0%
TS21 2DJ100%100%100%0%
TS21 2DL100%92%100%0%
TS21 2DP100%100%100%0%
TS21 2DT100%100%100%0%
TS21 2DW100%95%100%0%

Getting around

Sources: Department for Transport, NaPTAN (every public transport stop), as at 31 October 2026; Office of Rail and Road, Estimates of station usage 2024–25 (which stations are on the National Rail network, and their journeys: entries and exits in the year to March); OurAirports (public domain, kept by volunteers); car parks and charging points from Overture Maps Foundation, release 2026-10-21.0, which gathers business listings from Meta, Microsoft, Foursquare and others: not an official register, so some will be missing, private or out of date. Distances are straight lines from the middle of the street, not routes, and say nothing about how often anything runs. Stations opened since the end of ORR's year appear when ORR publishes the next one, each December; heritage railways are left out.

NearestDistance
Railway stationsNewton Aycliffe 78,000 journeys in 2024–259.9 km (6.1 miles)
Heighington 37,000 journeys in 2024–2510.3 km (6.4 miles)
Billingham 118,000 journeys in 2024–2512 km (7.5 miles)
Bus stops0 stops within 400 m (0.2 miles), 16 within 800 m (0.5 miles); nearest Barclays Bank Sedgefield410 m (0.3 miles)
Bus or coach stationTown Centre Ferryhill8.1 km (5.1 miles)
EV charging points1 within 1.6 km (1 mile); nearest Be.EV Charging Station1.2 km (0.7 miles)
Airport with scheduled flightsTeesside International Airport MME15.7 km (9.7 miles)
Nearest large airportNewcastle International Airport NCL45.9 km (29 miles)

Local services

Sources: NHS Organisation Data Service, as at 31 October 2026: GP practices, community pharmacies and dental practices with an NHS contract, open now, each placed at the centre of its postcode; hospitals are NHS trust and Welsh health board sites named as hospitals, and may not have an emergency department. Police stations and cash machines from Overture Maps Foundation, release 2026-10-21.0, which gathers business listings: not an official register, so some will be missing or out of date. Distances are straight lines from the middle of the street. Nothing here says whether a practice is taking new patients or a dentist new NHS patients.

NearestDistance
GP surgeries1 practices within 1.6 km (1 mile); nearest Skerne Medical Group500 m (0.3 miles)
Pharmacies1 pharmacies within 1.6 km (1 mile); nearest Sedgefield Pharmacy480 m (0.3 miles)
NHS dentists2 practices within 1.6 km (1 mile); nearest Sedgefield Dental Practice480 m (0.3 miles)
HospitalSedgefield Community Hospital1.3 km (0.8 miles)
Police stationSedgefield Police Office580 m (0.4 miles)
Cash machines1 machines within 800 m (0.5 miles); nearest The Cooperative Food Sedgefield, Sedgefield Cashzone480 m (0.3 miles)

Parks and green space

Source: Ordnance Survey, OS Open Greenspace, April 2026: public parks and gardens, play spaces, playing fields and allotments, with their entrances. Distances are straight lines from the middle of the street to a site's nearest entrance (or its edge where none is recorded), not walking routes; sizes are the area OS maps for each site. Some sites, such as school playing fields, may not be open to the public.

NearestDistance
Park or garden2 within 800 m (0.5 miles); nearest Unnamed 2.2 ha130 m
Play area1 within 800 m (0.5 miles); nearest Unnamed 9,480 m²190 m
Playing field2 within 800 m (0.5 miles); nearest Unnamed 1.3 ha460 m (0.3 miles)
AllotmentsUnnamed 2,760 m²860 m (0.5 miles)

Within 800 m (0.5 miles): 2 parks and gardens, 2.5 hectares in all.

Landmarks

The nearest historic landmark is Ceddesfeld Hall Gardens, a registered park or garden (Grade II), 260 m north-east. 25 listed buildings are within 1 km (0.6 miles), 1 of them Grade I and 1 of them Grade II*.

Historic places
NameWhat it isFrom the middle of the street
Ceddesfeld Hall GardensRegistered park or garden, Grade II260 m north-east
Church of St EdmundListed building, Grade I420 m (0.3 miles) north
Manor HouseListed building, Grade II*430 m (0.3 miles) north
Hardwick ParkRegistered park or garden, Grade II*1.1 km (0.7 miles) north-west
Natural landmarks within 5 km (3.1 miles)
NameWhat it isFrom the middle of the street
Serpentine LakeLake or reservoir1.4 km (0.9 miles) north-west
Bath PlantationWood1.5 km (0.9 miles) west
Neasless CovertWood1.7 km (1.1 miles) south
Dogkennel PlantationWood1.8 km (1.1 miles) north-west
Firtree HillHill1.9 km (1.2 miles) north-east
Moordale BottomValley4.9 km (3 miles) south

Sources: Historic England's registers through planning.data.gov.uk (MHCLG), and Cadw through DataMapWales (Welsh Government): World Heritage Sites within 10 km (6.2 miles), battlefields within 5 km (3.1 miles), registered parks and gardens within 3 km (1.9 miles), scheduled monuments within 2 km (1.2 miles), and Grade I and II* listed buildings within 1 km (0.6 miles). Ordnance Survey, OS Open Names, October 2026: named hills, valleys, lakes, woods, wetlands and coast (it has no rivers). Distances are in a straight line to the middle of each site, and being on a register does not mean there is public access.

Air quality

Source: Defra, modelled background air pollution, annual means for 2024, for the 1 km square that holds the middle of the street. These are background levels, away from the kerb: beside a busy road nitrogen dioxide in particular can be several times higher. UK limits are the legal annual limits for England and Wales; the World Health Organization's 2021 guidelines are much stricter, and most towns and cities are above them.

Annual means in µg/m³ (micrograms per cubic metre of air)
PollutantHereUK limitWHO guideline
Nitrogen dioxide (NO2)6.34010
Fine particles (PM2.5)5.6205
Particles (PM10)10.84015

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

Source: Defra, strategic noise mapping Round 4 (England), modelled for 2021 and published in December 2023, and its airport maps of the same round for the fifteen largest English airports, published in April 2026: Lden, the average sound level over a whole day with extra weight for the evening and night, on a 10 m grid, read at each address. These are models of traffic, not measurements; they leave out smaller airports and airfields, industry and neighbours, and a room at the back of a house is often much quieter than the front. The World Health Organization's guidelines are 53 dB for road traffic, 54 dB for railways and 45 dB for aircraft (below the lowest level shown here).

Addresses by modelled noise level (Lden, dB)
LevelRoad trafficRailways
60 to 6490
55 to 59470
Under 55133189

56 of the street's 189 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 County Durham: see them on the County Durham page.

Nearest schools

Source: Get Information About Schools (Department for Education), 1 November 2026; Ofsted monthly management information as at September 2026. Distances are straight lines from the middle of the street to the school; catchments and admissions are not shown. Since November 2025 Ofsted gives report-card grades by area, not one overall grade; older grades stand until a school is re-inspected.

SchoolPhaseAgesDistanceInspection
Sedgefield Primary SchoolPrimary3–11270 m No published inspection
Sedgefield Community CollegeSecondary11–161 km (0.6 miles) Report card (Jun 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
Sedgefield Hardwick Primary AcademyPrimary2–111 km (0.7 miles) No published inspection

Food hygiene ratings nearby

Source: Food Standards Agency, Food Hygiene Rating Scheme, extract of 1 November 2026. Each rating is shown with the date it was given; a business may have been re-inspected since the extract. Within 500 m (0.3 miles) of the middle of the street.

BusinessTypeDistanceRatingRated
Sedgefield Community Assoc Social Club TS21 2AEPub/bar/nightclub340 m5 Very good18 Jun 2014
The Hive of Sedgefield TS21 2BLRetailers - other340 mExempt
Thyme Square TS21 2BNRestaurant/Cafe/Canteen400 m (0.2 miles)5 Very good19 Feb 2025
The Pickled Parson TS21 2ABHotel/bed & breakfast/guest house410 m (0.3 miles)5 Very good20 Aug 2026
Pizza Castle Express TS21 2AJTakeaway/sandwich shop440 m (0.3 miles)5 Very good23 Jun 2026
King Chef TS21 2AJTakeaway/sandwich shop450 m (0.3 miles)4 Good5 Aug 2026
Franklin House Children's Nursery Ltd TS21 2AGSchool/college/university460 m (0.3 miles)5 Very good16 Dec 2025
Aubergine Cafe TS21 3ARRestaurant/Cafe/Canteen460 m (0.3 miles)5 Very good12 Mar 2026
Eastern Chop Suey House TS21 2AQTakeaway/sandwich shop460 m (0.3 miles)5 Very good9 Dec 2025
Sedgefield Fisheries TS21 2AQTakeaway/sandwich shop460 m (0.3 miles)4 Good4 Jun 2026
Premier - TAAH Convenience TS21 2AQRetailers - other460 m (0.3 miles)5 Very good17 Sep 2024
The Co-Operative Food TS21 3ARRetailers - supermarkets/hypermarkets460 m (0.3 miles)5 Very good14 May 2025
Number Four Teashop TS21 2AURestaurant/Cafe/Canteen470 m (0.3 miles)3 Generally satisfactory27 Jul 2026
Sedgefield Pharmacy TS21 3ATRetailers - other470 m (0.3 miles)Exempt
Tickety Boo TS21 2AURetailers - other480 m (0.3 miles)5 Very good3 Aug 2026

Crime within 250 m

Source: data.police.uk street-level crime, September 2025 to August 2026. Police forces move every crime to the nearest of about 760,000 anonymised map points before publishing, so these are crimes near this street, not on it, and a busy point can collect crimes from a wider area. Counts are of records, not convictions.

21 recorded crimes by category
CategoryCrimes
Anti-social behaviour9
Violence and sexual offences7
Vehicle crime2
Other crime1
Other theft1
Public order1

Most of these are attached to: On or near Sports/Recreation Area (10); On or near Spring Lane (3); On or near The Meadows (3); On or near Eden Drive (3); On or near The Leas (2).

People and work

Source: ONS Census 2021, taken on 21 March 2021, for the 3 Output Areas (small census areas of about 125 households each) that this street's postcodes are in: 949 residents in 409 households. The census was taken during a lockdown, so working from home is high and travel to work low compared with now. ONS swaps a few records between neighbouring areas and adds small amounts of noise to counts to protect privacy, so small differences mean little. Industry is not published for areas this small.

Who lives here

Around this streetEngland
Median age4340
Children under 1518%17%
Aged 65 and over22%18%

Homes

Around this streetEngland
Owned (outright or with a mortgage)75%61%
Owned outright33%33%
Shared ownership3%1%
Social rented16%17%
Private rented6%21%

Work and commuting

Around this streetEngland
Adults (16 and over) in work58%57%
Unemployment (of those working or looking for work)5%6%
Retired (of adults)30%22%
Long-term sick or disabled (of adults)3%4%
Work mainly from home (of those in work)28%32%
Travel to work by car or van64%48%
By train, Underground, metro or tram0%4%
By any public transport, including busunder 1%8%
On foot or by bicycle7%10%
Work within 10 km (6 miles) of home (of those who travel to work)23%65%
Work 30 km (19 miles) or more away13%8%

Education and languages

Around this streetEngland
Degree or other higher qualification, Level 4+ (of adults)41%34%
No qualifications12%18%
Apprenticeship as highest qualification6%5%
Main language English (aged 3 and over)100%91%
Cannot speak English well or at all0%2%

Deprivation

The 2 neighbourhoods around this street are in deciles 7 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.

Source: English Indices of Deprivation 2025 (Ministry of Housing, Communities and Local Government), by LSOA (about 1,500 people), through the ONS Postcode Directory. The index combines income, employment, health, education, crime, housing and living environment; it ranks areas against each other and does not describe any one household. Ranks in England and Wales are worked out separately and cannot be compared.

What has changed

Nothing new since the change feed started on 30 October 2026. New sales and energy certificates, and hygiene ratings, school inspections and flood figures nearby, will be listed here as the sources update.

Everything that has changed on and near this street

Postcodes on this street

Source: ONS Postcode Directory August 2026, ONS UPRN Directory September 2026, OS Open Linked Identifiers September 2026. A postcode can cover more than one street; the share shows how many of its addresses are on this one.

Nearby streets

Eden Drive · Cragside · The Leas · Lorimer Close · Lambton Crescent · The Willows · Cartwright Close · Hornby Avenue · Stockton Road · Huntsman Close · Wykes Close · Caden Court

All the streets in TS21 and across County Durham.

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.