Ashdown Place Corby, North Northamptonshire

39 addresses across 2 postcodes (NN17), about 130 m long, classed as a local road. USRN 9300271.

  • Sales: 40 recorded sales since 1995; in 2025 the median was £118,000 across 1 sale.
  • Energy: 28 homes have an energy certificate (C: 13, D: 12, E: 2, F: 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 A; Band D in North Northamptonshire costs £2,424 a year in 2026-27.
  • Broadband: Gigabit broadband is available to 56% to 100% of premises.
  • Transport: The nearest railway station is Corby, about 940 m (0.6 miles) away in a straight line.
  • Green space: The nearest park or garden, Coronation Park, is about 450 m (0.3 miles) away.
  • Air: Background air pollution in 2024 was 8.2 µg/m³ of nitrogen dioxide and 7.2 of PM2.5, within UK legal limits.
  • Height: It is about 121 m above sea level.
  • Noise: 9 of its 39 addresses are modelled at 55 dB or more from road traffic.
  • Doctors: The nearest GP surgery is Lakeside Healthcare, about 350 m away, with 3 practices within 1.6 km (1 mile).
  • People: About 580 people lived in the census areas around it in 2021; 62% of households owned their home and 23% of adults held a degree or other higher qualification.
  • Crime: 111 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.

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
20251£118,000£118,000£118,000
20221£88,000£88,000£88,000
20192£71,000£65,000£77,000
20181£65,000£65,000£65,000
20152£48,500£40,000£57,000
20141£52,000£52,000£52,000
20111£75,000£75,000£75,000
20071£97,000£97,000£97,000
20061£60,500£60,500£60,500
20044£51,995£42,000£72,500
20033£48,000£42,950£58,000
20024£29,995£23,000£31,000
Most recent sales (40)
DateAddressTypePriceNotes
5 Dec 202534 NN17 1FHTerraced£118,000Leasehold.
21 Mar 202430 NN17 1FHFlat or maisonette£73,333Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
18 Jan 202228 NN17 1FHFlat or maisonette£88,000Leasehold.
15 Nov 201923 NN17 1FHFlat or maisonette£65,000Leasehold.
31 Oct 201932 NN17 1FHFlat or maisonette£77,000Leasehold.
20 Dec 201817 NN17 1FHFlat or maisonette£65,000Leasehold.
21 Sep 201831 NN17 1FHFlat or maisonette£95,000Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
28 Oct 201620 NN17 1FHFlat or maisonette£53,500Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
4 Sep 201518 NN17 1FHFlat or maisonette£40,000Leasehold.
10 Aug 201526 NN17 1FHFlat or maisonette£57,000Leasehold.
22 May 201426 NN17 1FHFlat or maisonette£52,000Leasehold.
9 Apr 201424 NN17 1FHFlat or maisonette£40,000Leasehold. Not a standard sale (repossession, buy-to-let or transfer).
24 Feb 201130 NN17 1FHFlat or maisonette£75,000Leasehold.
18 Sep 200731 NN17 1FHFlat or maisonette£97,000Leasehold.
31 Jul 200625 NN17 1FHFlat or maisonette£60,500Leasehold.
30 Jun 200426 NN17 1FHFlat or maisonette£51,995Leasehold.
25 Jun 200427 NN17 1FHFlat or maisonette£51,995Leasehold.
18 Jun 200431 NN17 1FHFlat or maisonette£72,500Leasehold.
9 Jan 200425 NN17 1FHFlat or maisonette£42,000Leasehold.
4 Nov 200334 NN17 1FHTerraced£48,000Leasehold.
15 Aug 200328 NN17 1FHFlat or maisonette£42,950Leasehold.
30 Jun 200335 NN17 1FHTerraced£58,000
20 Dec 200224 NN17 1FHFlat or maisonette£29,995Leasehold.
19 Jul 200220 NN17 1FHFlat or maisonette£23,000Leasehold.
10 May 200221 NN17 1FHFlat or maisonette£29,995Leasehold.
8 Feb 200228 NN17 1FHFlat or maisonette£31,000Leasehold.
20 Dec 200124 NN17 1FHFlat or maisonette£20,000Leasehold.
31 May 200131 NN17 1FHFlat or maisonette£32,950Leasehold.
28 Feb 200134 NN17 1FHTerraced£32,500Leasehold.
26 Jun 200032 NN17 1FHFlat or maisonette£33,000Leasehold.
20 Jun 200023 NN17 1FHFlat or maisonette£26,500Leasehold.
29 Oct 199933 NN17 1FHFlat or maisonette£31,000Leasehold.
16 Sep 199918 NN17 1FHFlat or maisonette£16,500Leasehold.
30 Jul 199936 NN17 1FHTerraced£30,995
26 May 199928 NN17 1FHFlat or maisonette£26,000Leasehold.
3 Jul 199819 NN17 1FHFlat or maisonette£24,995Leasehold.
27 Feb 199831 NN17 1FHFlat or maisonette£19,995Leasehold.
25 Apr 199729 NN17 1FHFlat or maisonette£22,500Leasehold.
6 Nov 199623 NN17 1FHFlat or maisonette£19,500Leasehold.
24 Feb 199530 NN17 1FHFlat or maisonette£28,000Leasehold.

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 August 2009 and some homes have none. Address data © Ordnance Survey and Royal Mail, shown for understanding the energy efficiency of buildings only.

28 homes with a current certificate; median floor area 34 m². Most common: Flat (27); House, mid-terrace (1). Built: 1991-1995 (12); 1983-1990 (10); 1976-1982 (4). Tenure at assessment: rented (private) (10); owner-occupied (8); rented (social) (6).

Council tax

What each band costs in North Northamptonshire in 2026-27: Band D £2,424 a year on average, including the police, fire and any county and parish charges.

ABCDEFGH
£1,616£1,885£2,155£2,424£2,963£3,501£4,040£4,848

Homes by band in the neighbourhoods around this street: most are in band A (64% of about 1,450 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: yes, Lloyds. 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)

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

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.

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 addresses are about 121 m above sea level.

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
NN17 1FH100%56%56%0%
NN17 1HQ100%100%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 stationsCorby 561,000 journeys in 2024–25940 m (0.6 miles)
Kettering 1.1 million journeys in 2024–2511.5 km (7.1 miles)
Market Harborough 943,000 journeys in 2024–2514.4 km (9 miles)
Bus stops8 stops within 400 m (0.2 miles), 43 within 800 m (0.5 miles); nearest Ashdown Place Dales60 m
EV charging points6 within 1.6 km (1 mile); nearest bp Pulse1 km (0.6 miles)
Airport with scheduled flightsEast Midlands Airport EMA56.7 km (35 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 surgeries3 practices within 1.6 km (1 mile); nearest Lakeside Healthcare350 m
Pharmacies10 pharmacies within 1.6 km (1 mile); nearest Well350 m
NHS dentists7 practices within 1.6 km (1 mile); nearest The Dental Care Centre530 m (0.3 miles)
HospitalCorby Community Hospital1 km (0.6 miles)
Police stationKettering Police Station10.9 km (6.8 miles)
Cash machines4 machines within 800 m (0.5 miles); nearest Central England Co-op - Occupation Road210 m

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 garden5 within 800 m (0.5 miles); nearest Coronation Park 2.8 ha450 m (0.3 miles)
Largest park within 800 m (0.5 miles)Unnamed 66 ha570 m (0.4 miles)
Play area7 within 800 m (0.5 miles); nearest Unnamed 110 m²310 m
Playing field4 within 800 m (0.5 miles); nearest West Glebe Park 20 ha250 m
Allotments3 within 800 m (0.5 miles); nearest Unnamed 9,000 m²280 m

Within 800 m (0.5 miles): 5 parks and gardens, 71 hectares in all.

Landmarks

The nearest historic landmark is Roman road in Hazel Wood, a scheduled monument, 1.2 km (0.7 miles) south-west.

Historic places
NameWhat it isFrom the middle of the street
Roman road in Hazel WoodScheduled monument1.2 km (0.7 miles) south-west
Rockingham CastleRegistered park or garden, Grade II*2.7 km (1.7 miles) north-west
Natural landmarks within 5 km (3.1 miles)
NameWhat it isFrom the middle of the street
Hazel WoodWood1 km (0.6 miles) south-west
Thoroughsale WoodWood1.2 km (0.7 miles) west
Seymour PlantationWood2 km (1.2 miles) north-west
Bandy SladeWood2 km (1.2 miles) south
Gretton Brook PlantationWood2.1 km (1.3 miles) north
Willow Brook (North)Lake or reservoir3.7 km (2.3 miles) north-east

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)8.24010
Fine particles (PM2.5)7.2205
Particles (PM10)11.14015

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
55 to 5990
Under 553039

9 of the street's 39 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 North Northamptonshire: see them on the North Northamptonshire 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
Our Lady of Walsingham Catholic Primary School Roman CatholicPrimary4–11130 m No published inspection
Rockingham Primary SchoolPrimary4–11700 m (0.4 miles) Report card (Jul 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met
Studfall Infant AcademyPrimary3–7720 m (0.4 miles) No published inspection
Studfall Junior AcademyPrimary7–11840 m (0.5 miles) No published inspection
Pen Green Centre for Children and Their FamiliesNursery2–5880 m (0.5 miles) No published inspection
Corby Technical SchoolSecondary11–18920 m (0.6 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
Exeter A Learning Community AcademyPrimary2–111.2 km (0.7 miles) Good (Jun 2023, overall grade under the previous framework)
Corby Old Village Primary SchoolPrimary4–111.3 km (0.8 miles) Good (Oct 2023, overall grade under the previous framework)
Woodnewton- A Learning CommunityPrimary2–111.3 km (0.8 miles) Good (Apr 2024, overall grade under the previous framework)
Hazel Leys AcademyPrimary3–111.7 km (1.1 miles) No published inspection
Lodge Park AcademySecondary11–181.8 km (1.1 miles) Report card (Apr 2026): Curriculum and teaching: Expected standard; Achievement: Needs attention; Attendance and behaviour: Expected standard; Personal development and wellbeing: Strong standard; Inclusion: Expected standard; Leadership and governance: Strong standard; Post-16 provision: Strong standard; Safeguarding standards: Met
St Brendan's Catholic Primary School Roman CatholicPrimary4–111.8 km (1.1 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
Taste Of Chilli NN17 1EERestaurant/Cafe/Canteen40 m5 Very good4 Jun 2025
A Tasca NN17 1EEOther catering premises50 m5 Very good26 Jul 2024
Temptation NN17 1EEOther catering premises50 m5 Very good26 Jul 2024
Pizza GoGo Corby NN17 1EEOther catering premises50 m5 Very good19 Aug 2026
Nisa Local NN17 1EERetailers - other90 m5 Very good19 Nov 2019
Rafferty's Chippy NN17 1EETakeaway/sandwich shop90 m5 Very good8 Sep 2026
Castle Kebab House NN17 1EETakeaway/sandwich shop90 m3 Generally satisfactory4 Jun 2025
Little Learners Childcare NN17 1EEHospitals/Childcare/Caring Premises150 m5 Very good5 May 2026
Kingswood Catering Services At Our Ladys Roman Catholic Infa NN17 1EESchool/college/university150 m5 Very good20 Jul 2018
Johnny Wong NN17 1EETakeaway/sandwich shop160 m5 Very good12 Feb 2025
Mazza Indian Restaurant \& Takeway NN17 1EEOther catering premises180 m5 Very good14 Jan 2026
High Street Bakery NN17 1EDTakeaway/sandwich shop230 m5 Very good14 Jan 2025
Co-op NN17 1EDRetailers - supermarkets/hypermarkets280 m5 Very good30 Jan 2020
Cafe Luna NN17 1EDRestaurant/Cafe/Canteen280 m5 Very good20 Jan 2026
Occasion Bar Co NN17 1HNMobile caterer290 m5 Very good8 Jun 2017

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.

111 recorded crimes by category
CategoryCrimes
Violence and sexual offences33
Shoplifting25
Anti-social behaviour14
Criminal damage and arson8
Public order7
Burglary7
Other theft6
Possession of weapons3
Other crime3
Vehicle crime2
Robbery1
Drugs1
Bicycle theft1

Most of these are attached to: On or near Supermarket (30); On or near Forest Gate Road (20); On or near Ashdown Place (16); On or near Charnwood Road (9); On or near Deene Close (8).

People and work

Source: ONS Census 2021, taken on 21 March 2021, for the 2 Output Areas (small census areas of about 125 households each) that this street's postcodes are in: 580 residents in 257 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 age4140
Children under 1516%17%
Aged 65 and over15%18%

Homes

Around this streetEngland
Owned (outright or with a mortgage)62%61%
Owned outright31%33%
Shared ownershipunder 1%1%
Social rented14%17%
Private rented24%21%

Work and commuting

Around this streetEngland
Adults (16 and over) in work63%57%
Unemployment (of those working or looking for work)5%6%
Retired (of adults)19%22%
Long-term sick or disabled (of adults)6%4%
Work mainly from home (of those in work)23%32%
Travel to work by car or van58%48%
By train, Underground, metro or tramunder 1%4%
By any public transport, including bus1%8%
On foot or by bicycle15%10%
Work within 10 km (6 miles) of home (of those who travel to work)73%65%
Work 30 km (19 miles) or more away7%8%

Education and languages

Around this streetEngland
Degree or other higher qualification, Level 4+ (of adults)23%34%
No qualifications23%18%
Apprenticeship as highest qualification5%5%
Main language English (aged 3 and over)86%91%
Cannot speak English well or at all3%2%

Deprivation

The 2 neighbourhoods around this street are in deciles 4 to 5 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

Streather Drive · Charnwood Road · Woodfield Grove · Deene Close · Westfields Road · Forest Gate Road · Rutherglen Road · Eskdale Avenue · Upperfield Grove · Fineshade Grove · Thoroughsale Road · Tanfields Grove

All the streets in NN17 and across North Northamptonshire.

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.