Haddon Grove Altrincham, Trafford

45 addresses across 1 postcode (WA15), about 200 m long, classed as a local road. USRN 41000553.

  • Sales: 86 recorded sales since 1995; in 2025 the median was £365,000 across 4 sales.
  • Energy: 30 homes have an energy certificate (C: 2, D: 18, E: 10).
  • 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 Trafford costs £2,292 a year in 2026-27.
  • Broadband: Gigabit broadband is available to 100% of premises.
  • Transport: The nearest railway station is Navigation Road, about 480 m (0.3 miles) away in a straight line.
  • Green space: The nearest park or garden is about 560 m (0.3 miles) away.
  • Air: Background air pollution in 2024 was 11.3 µg/m³ of nitrogen dioxide and 7.0 of PM2.5, within UK legal limits.
  • Height: It is about 26 m above sea level.
  • Noise: 8 of its 45 addresses are modelled at 55 dB or more from road traffic.
  • Doctors: The nearest GP surgery is Family Surgery, about 560 m (0.3 miles) away, with 8 practices within 1.6 km (1 mile).
  • People: About 290 people lived in the census areas around it in 2021; 92% of households owned their home and 43% of adults held a degree or other higher qualification.

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
20254£365,000£342,000£435,000
20241£410,000£410,000£410,000
20233£480,000£305,000£490,000
20222£475,625£425,250£526,000
20213£335,000£318,000£345,000
20204£361,250£278,000£418,000
20192£350,000£300,000£400,000
20172£287,500£270,000£305,000
20161£266,000£266,000£266,000
20153£243,500£200,000£275,000
20144£233,475£192,000£290,000
20135£180,000£161,000£215,000
Most recent sales (latest 50 of 86)
DateAddressTypePriceNotes
31 Oct 20257 WA15 6SATerraced£342,000
5 Jun 202519 WA15 6SATerraced£355,000
12 Mar 202538 WA15 6SASemi-detached£435,000
28 Feb 202512 WA15 6SASemi-detached£375,000
29 Nov 202416 WA15 6SATerraced£410,000
6 Nov 202321 WA15 6SATerraced£305,000
2 Aug 202314 WA15 6SASemi-detached£480,000
30 Jun 202336 WA15 6SASemi-detached£490,000
10 Jun 202241 WA15 6SATerraced£526,000
20 May 202215 WA15 6SATerraced£425,250
5 Nov 202142 WA15 6SASemi-detached£318,000
19 Oct 202118 WA15 6SASemi-detached£345,000
30 Jun 202133 WA15 6SATerraced£335,000
21 Dec 202022 WA15 6SASemi-detached£362,500
12 Nov 202019 WA15 6SATerraced£278,000
27 Mar 202036 WA15 6SASemi-detached£418,000
7 Feb 202032 WA15 6SASemi-detached£360,000
12 Jul 201916 WA15 6SATerraced£300,000
29 May 201929 WA15 6SATerraced£400,000
2 Nov 20178 WA15 6SASemi-detached£270,000
17 Jul 201736 WA15 6SASemi-detached£305,000
16 Sep 201645 WA15 6SATerraced£266,000
24 Nov 201514 WA15 6SASemi-detached£243,500
31 Jul 201533 WA15 6SATerraced£200,000
1 Apr 201530 WA15 6SASemi-detached£275,000
27 Jun 201429 WA15 6SATerraced£290,000
16 May 201425 WA15 6SATerraced£192,000
28 Mar 201441 WA15 6SATerraced£249,950
27 Jan 201420 WA15 6SASemi-detached£217,000
1 Oct 201336 WA15 6SASemi-detached£215,000
30 Aug 20134 WA15 6SADetached£185,000
19 Jul 20133 WA15 6SATerraced£161,000
4 Apr 20139 WA15 6SATerraced£162,000
15 Feb 201323 WA15 6SATerraced£180,000
2 Nov 201230 WA15 6SASemi-detached£213,000
20 Apr 201239 WA15 6SATerraced£189,000
23 Sep 201139 WA15 6SASemi-detached£147,690
18 Feb 201144 WA15 6SASemi-detached£180,000
6 Nov 200916 WA15 6SATerraced£180,000
1 Feb 20087 WA15 6SATerraced£184,200
18 Jan 200823 WA15 6SATerraced£180,000
26 Oct 200726 WA15 6SASemi-detached£236,000
12 Oct 200719 WA15 6SATerraced£171,950
31 Aug 20074 WA15 6SADetached£176,000
17 Apr 200714 WA15 6SASemi-detached£197,000
2 Apr 200729 WA15 6SASemi-detached£250,000
22 Mar 200732 WA15 6SASemi-detached£230,000
30 Oct 200616 WA15 6SATerraced£59,000
10 Oct 20063 WA15 6SATerraced£162,000
2 Mar 200629 WA15 6SASemi-detached£151,000

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

30 homes with a current certificate; median floor area 91 m². Most common: House, semi-detached (17); House, mid-terrace (6); House, end-terrace (6). Built: 1900-1929 (17); before 1900 (5); 1930-1949 (5). Tenure at assessment: owner-occupied (24); rented (private) (3).

Each home's certificates and sales (17 addresses)

Council tax

What each band costs in Trafford in 2026-27: Band D £2,292 a year on average, including the police, fire and any county and parish charges.

ABCDEFGH
£1,528£1,782£2,037£2,292£2,801£3,310£3,820£4,583

Homes by band in the neighbourhood around this street: most are in band C (51% of about 610 homes).

Sources: Valuation Office Agency, Council Tax: stock of properties, homes at 31 March 2026 (counts rounded to the nearest 10), for the neighbourhood (census area of about 700 homes) 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.

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

Finished in the last three months

  • 20 October 2026: TRAFFORD METROPOLITAN BOROUGH COUNCIL, Highway improvement works, give and take, on the footway (minor works)
  • 16 October 2026 to 20 October 2026: United Utilities Water Ltd, Disconnection or alteration of supply, give and take, on the footway (minor works)
  • 8 September 2026: TRAFFORD METROPOLITAN BOROUGH COUNCIL, Highway improvement works, give and take, on the carriageway (minor works)
  • 9 September 2026: TRAFFORD METROPOLITAN BOROUGH COUNCIL, Highway improvement works, give and take, on the carriageway (minor works)

Source: Department for Transport, Street Manager open data, permits and works up to 31 October 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, 0 addresses are in areas at high risk, 0 at medium risk and 13 at low risk. Each address counts once, at the higher of its rivers-and-sea and surface-water risk.

Rivers and the sea alone: of the 45 homes the Environment Agency counts, 0 are in areas at high risk, 0 medium, 0 low and 45 very low.

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 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 26 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
WA15 6SA100%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 stationsNavigation Road 96,000 journeys in 2024–25480 m (0.3 miles)
Altrincham 316,000 journeys in 2024–251.3 km (0.8 miles)
Hale (Manchester) 131,000 journeys in 2024–252.3 km (1.4 miles)
Underground, metro or tramNavigation Road (Manchester Metrolink)440 m (0.3 miles)
Timperley (Manchester Metrolink)640 m (0.4 miles)
Altrincham (Manchester Metrolink)1.4 km (0.9 miles)
Bus stops6 stops within 400 m (0.2 miles), 24 within 800 m (0.5 miles); nearest Deansgate Lane Navigation Road160 m
Bus or coach stationAltrincham Interchange1.3 km (0.8 miles)
Car parksPurple Parking1.4 km (0.9 miles)
EV charging points4 within 1.6 km (1 mile); nearest Be.EV Charging Station1 km (0.6 miles)
Airport with scheduled flightsManchester Airport MAN6.7 km (4.2 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 surgeries8 practices within 1.6 km (1 mile); nearest Family Surgery560 m (0.3 miles)
Pharmacies11 pharmacies within 1.6 km (1 mile); nearest Station Pharmacy540 m (0.3 miles)
NHS dentists8 practices within 1.6 km (1 mile); nearest Park Road Dental Care LTD540 m (0.3 miles)
HospitalAltrincham Hospital1.7 km (1.1 miles)
Police stationAltrincham Police Station920 m (0.6 miles)
Cash machinesShell Timperley Cashzone1 km (0.6 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 garden1 within 800 m (0.5 miles); nearest Unnamed 810 m²560 m (0.3 miles)
Play area4 within 800 m (0.5 miles); nearest Unnamed 680 m²360 m
Playing field4 within 800 m (0.5 miles); nearest Pickering Lodge 1.8 ha290 m
Allotments1 within 800 m (0.5 miles); nearest Pickering Lodge Allotments 4,710 m²470 m (0.3 miles)

Within 800 m (0.5 miles): 1 park or garden, 0.1 hectares in all.

Landmarks

The nearest historic landmark is Stamford Park, Altrincham, a registered park or garden (Grade II), 1.6 km (1 mile) south. 5 listed buildings are within 1 km (0.6 miles).

Historic places
NameWhat it isFrom the middle of the street
Stamford Park, AltrinchamRegistered park or garden, Grade II1.6 km (1 mile) south
Sale and Brooklands CemeteryRegistered park or garden, Grade II2.4 km (1.5 miles) north
Natural landmarks within 5 km (3.1 miles)
NameWhat it isFrom the middle of the street
King George V PoolLake or reservoir1.2 km (0.7 miles) south
Woodheys CloughValley1.3 km (0.8 miles) north-west
Beccles WoodWood1.6 km (1 mile) north-east
Broom WoodWood2.1 km (1.3 miles) east
Malljurs CovertWood2.5 km (1.5 miles) north-west
Watch HillHill4.2 km (2.6 miles) south-west

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)11.34010
Fine particles (PM2.5)7.0205
Particles (PM10)10.84015

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

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 trafficRailwaysAircraft
55 to 59800
Under 55374545

8 of the street's 45 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 Trafford: see them on the Trafford page.

Nearest schools

Source: Get Information About Schools (Department for Education), 3 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
St Hugh's Catholic Primary School Roman CatholicPrimary3–11470 m (0.3 miles) No overall grade (Oct 2024, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good
Willows Primary SchoolPrimary3–11550 m (0.3 miles) No published inspection
Wellington SchoolSecondary11–18560 m (0.3 miles) No published inspection
Navigation Primary SchoolPrimary3–11690 m (0.4 miles) No overall grade (Mar 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Outstanding; Personal development: Outstanding; Leadership and management: Good
Park Road Academy Primary SchoolPrimary4–11840 m (0.5 miles) Outstanding (Nov 2023, overall grade under the previous framework)
St Vincent's Catholic Primary School Roman CatholicPrimary4–111 km (0.6 miles) Outstanding (Jun 2024, overall grade under the previous framework)
The Trafford and Stockport College Group16 plus16–991.1 km (0.7 miles) No published inspection
Blessed Thomas Holford Catholic College Roman CatholicSecondary11–181.2 km (0.8 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
Heyes Lane Primary SchoolPrimary3–111.3 km (0.8 miles) No published inspection
Altrincham CofE (Aided) Primary School Church of EnglandPrimary4–111.3 km (0.8 miles) Good (Jan 2023, overall grade under the previous framework)
Tyntesfield Primary SchoolPrimary3–111.4 km (0.9 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
Cloverlea Primary SchoolPrimary3–111.5 km (0.9 miles) No overall grade (Oct 2024, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good

Food hygiene ratings nearby

Source: Food Standards Agency, Food Hygiene Rating Scheme, extract of 3 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
Chinese Kitchen WA15 6SBTakeaway/sandwich shop150 m5 Very good29 Nov 2017
Nisa WA15 6SBRetailers - other180 m4 Good18 Jun 2026
Gardeners Arms WA15 6SQPub/bar/nightclub210 m5 Very good10 Dec 2024
Newhaven Cafe WA15 6LPRestaurant/Cafe/Canteen220 m5 Very good4 Feb 2026
Hope Street Kitchen WA15 6JSMobile caterer230 m5 Very good18 Sep 2025
Bright Horizons Timperley Day Nursery WA15 6AYHospitals/Childcare/Caring Premises240 m5 Very good1 Jul 2026
Forest Preparatory School WA15 6LJSchool/college/university310 m5 Very good10 Nov 2025
Stubborn Mule Brewery WA14 1SJManufacturers/packers320 m4 Good12 Jun 2026
The Grill WA15 6JLTakeaway/sandwich shop360 m4 Good14 Aug 2025
The Bridge Cafe (Moss Lane) Ltd WA15 6JLRestaurant/Cafe/Canteen360 m5 Very good4 Jul 2025
Antz in your Pantz LTD WA14 1TFRestaurant/Cafe/Canteen400 m (0.2 miles)5 Very good2 Jul 2025
Tyler International Ltd WA14 1TDRetailers - other400 m (0.2 miles)5 Very good25 Nov 2025
The Railway Club Altrincham WA14 1LJPub/bar/nightclub480 m (0.3 miles)4 Good25 Jun 2025

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.

No crimes recorded at anonymised points within 250 m in this period (cheshire).

People and work

Source: ONS Census 2021, taken on 21 March 2021, for the Output Area (a small census area of about 125 households) that this street's postcodes are in: 292 residents in 121 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 age4240
Children under 1519%17%
Aged 65 and over14%18%

Homes

Around this streetEngland
Owned (outright or with a mortgage)92%61%
Owned outright42%33%
Shared ownership0%1%
Social rented2%17%
Private rented7%21%

Work and commuting

Around this streetEngland
Adults (16 and over) in work71%57%
Unemployment (of those working or looking for work)3%6%
Retired (of adults)17%22%
Long-term sick or disabled (of adults)2%4%
Work mainly from home (of those in work)48%32%
Travel to work by car or van42%48%
By train, Underground, metro or tram4%4%
By any public transport, including bus4%8%
On foot or by bicycle5%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)43%34%
No qualifications12%18%
Apprenticeship as highest qualification5%5%
Main language English (aged 3 and over)96%91%
Cannot speak English well or at allunder 1%2%

Deprivation

The neighbourhood around this street is in decile 10 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

  • Roadworks Street works permit: United Utilities Water Ltd: Disconnection or alteration of supply, 16 October 2026 to 20 October 2026 (give and take) found 3 November 2026

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.

  • WA15 6SA: 45 addresses of 46 in the postcode

Nearby streets

Ash Grove · Henley Drive · Bridge Grove · Victoria Avenue · Bradley Close · Mosley Close · St Andrew's Avenue · Birley Close · Hall Avenue · Marley Close · Deansgate Lane · Stocksdean Close

All the streets in WA15 and across Trafford.

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.