Hillside Northwich, Cheshire West and Chester

33 addresses across 2 postcodes (CW8), about 160 m long, classed as a local road. USRN 41700783.

  • Sales: 49 recorded sales since 1995; in 2026 the median was £185,000 across 2 sales.
  • Energy: 17 homes have an energy certificate (C: 6, D: 8, 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 Cheshire West and Chester costs £2,517 a year in 2026-27.
  • Broadband: Gigabit broadband is available to 100% of premises.
  • Transport: The nearest railway station is Greenbank, about 220 m away in a straight line.
  • Green space: The nearest park or garden is about 270 m away.
  • Air: Background air pollution in 2024 was 6.8 µg/m³ of nitrogen dioxide and 6.1 of PM2.5, within UK legal limits.
  • Height: Its addresses are 20 to 32 m above sea level.
  • Noise: 5 of its 33 addresses are modelled at 55 dB or more from road traffic.
  • Doctors: The nearest GP surgery is Firdale Medical Centre, about 220 m away, with 3 practices within 1.6 km (1 mile).
  • People: About 500 people lived in the census areas around it in 2021; 78% of households owned their home and 35% of adults held a degree or other higher qualification.
  • Crime: 30 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
20262£185,000£150,000£220,000
20251£220,000£220,000£220,000
20244£223,750£141,000£255,000
20231£215,000£215,000£215,000
20211£128,000£128,000£128,000
20201£126,000£126,000£126,000
20191£150,000£150,000£150,000
20183£130,000£122,500£134,950
20171£58,000£58,000£58,000
20161£185,000£185,000£185,000
20151£81,500£81,500£81,500
20142£125,000£125,000£125,000
Most recent sales (49)
DateAddressTypePriceNotes
19 Jun 202612 CW8 4TDTerraced£150,000
17 Jun 202618 CW8 4TDSemi-detached£220,000
14 Apr 202531 CW8 4TDDetached£220,000
18 Dec 202432 CW8 4TDDetached£255,000
1 Nov 20247 CW8 4TDSemi-detached£220,000
23 Apr 20241 CW8 4TDDetached£227,500
28 Mar 202417 CW8 4TDSemi-detached£141,000
28 Apr 202330 CW8 4TDDetached£215,000
17 Sep 20218 CW8 4TDSemi-detached£128,000
18 Dec 20207 CW8 4TDSemi-detached£126,000
5 Apr 20191 CW8 4TDDetached£150,000
23 Nov 201822 CW8 4TDDetached£130,000
5 Oct 201817 CW8 4TDSemi-detached£122,500
2 Feb 201829 CW8 4TDSemi-detached£134,950
10 Mar 201719 CW8 4TDSemi-detached£58,000Leasehold.
16 Sep 201627 CW8 4TDDetached£185,000
19 May 201533 CW8 4TDDetached£81,500Leasehold.
17 Oct 201421 CW8 4TDSemi-detached£125,000
14 Jul 201429 CW8 4TDSemi-detached£125,000
9 Aug 201125 CW8 4TDSemi-detached£132,000
29 Jan 201018 CW8 4TDSemi-detached£116,500
12 Jan 200921 CW8 4TDSemi-detached£138,000
6 Jun 200714 CW8 4TDSemi-detached£145,000
7 Dec 200615 CW8 4TDSemi-detached£161,250
10 Nov 200616 CW8 4TDDetached£140,000
1 Oct 200311 CW8 4TDDetached£119,950
6 May 200317 CW8 4TDSemi-detached£77,000
7 Jun 200221 CW8 4TDSemi-detached£69,950
19 Apr 20027 CW8 4TDSemi-detached£36,000Leasehold.
3 Apr 200214 CW8 4TDSemi-detached£74,000
6 Sep 200112 CW8 4TDTerraced£59,500
25 May 200118 CW8 4TDSemi-detached£32,500Leasehold.
31 Jan 200116 CW8 4TDDetached£66,500
1 Sep 200028 CW8 4TDSemi-detached£78,950
21 Aug 20007 CW8 4TDSemi-detached£27,500Leasehold.
21 Jul 200011 CW8 4TDDetached£55,000
12 May 200025 CW8 4TDSemi-detached£66,750
14 Dec 199921 CW8 4TDSemi-detached£51,000
28 May 199923 CW8 4TDSemi-detached£47,000
10 Dec 199830 CW8 4TDDetached£62,000
30 Mar 199832 CW8 4TDDetached£58,000
13 Jun 199717 CW8 4TDSemi-detached£48,000
14 Mar 199712 CW8 4TDTerraced£34,500
25 Nov 199612 CW8 4TDTerraced£36,000
1 Nov 199621 CW8 4TDSemi-detached£44,500
19 Jan 19961 CW8 4TDDetached£58,500
19 Jan 199624 CW8 4TDSemi-detached£42,000
19 Sep 199516 CW8 4TDDetached£40,500
6 Jan 199528 CW8 4TDSemi-detached£54,000

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 February 2010 and some homes have none. Address data © Ordnance Survey and Royal Mail, shown for understanding the energy efficiency of buildings only.

17 homes with a current certificate; median floor area 53 m². Most common: House, semi-detached (9); Bungalow, semi-detached (4); Bungalow, detached (2). Built: 1983-1990 (12); 1976-1982 (3); 1991-1995 (1). Tenure at assessment: owner-occupied (14); rented (private) (1).

Each home's certificates and sales (10 addresses)

Council tax

What each band costs in Cheshire West and Chester in 2026-27: Band D £2,517 a year on average, including the police, fire and any county and parish charges.

ABCDEFGH
£1,678£1,958£2,238£2,517£3,077£3,636£4,196£5,035

Homes by band in the neighbourhood around this street: most are in band A (26% of about 780 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

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, 0 addresses are in areas at high risk, 0 at medium risk and 1 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
CW8 4TDnot in 2 or 3 0 / 0 / 0 unlikely
CW8 4TLnot in 2 or 3 0 / 0 / 1 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 33 addresses are between 20 m and 32 m above sea level (26 m on average); the ground rises about 12 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
CW8 4TD100%100%100%0%
CW8 4TL100%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 stationsGreenbank 215,000 journeys in 2024–25220 m
Hartford (Cheshire) 218,000 journeys in 2024–251.8 km (1.1 miles)
Northwich 189,000 journeys in 2024–252.6 km (1.6 miles)
Bus stops8 stops within 400 m (0.2 miles), 49 within 800 m (0.5 miles); nearest Kestrel Road Greenbank100 m
Car parksZion Street Car Park800 m (0.5 miles)
EV charging points1 within 1.6 km (1 mile); nearest Park Street Car Park GeniePoint760 m (0.5 miles)
Airport with scheduled flightsManchester Airport MAN20 km (12 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 Firdale Medical Centre220 m
Pharmacies5 pharmacies within 1.6 km (1 mile); nearest Hoggs Chemist220 m
NHS dentists4 practices within 1.6 km (1 mile); nearest Dental Surgery130 m
HospitalVictoria Infirmary Northwich Cdc1.3 km (0.8 miles)
Police stationNorthwich Police Station1.8 km (1.1 miles)
Cash machinesSnax 24 - Northwich Cashzone1.2 km (0.7 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 2,020 m²270 m
Largest park within 800 m (0.5 miles)Unnamed 6.2 ha450 m (0.3 miles)
Play area2 within 800 m (0.5 miles); nearest Unnamed 510 m²630 m (0.4 miles)
Playing field3 within 800 m (0.5 miles); nearest Unnamed 1.6 ha280 m
AllotmentsQueensgate Allotments 1.2 ha1 km (0.7 miles)

Within 800 m (0.5 miles): 2 parks and gardens, 6.4 hectares in all.

Landmarks

The nearest historic landmark is The Beeches, a listed building (Grade II*), 620 m (0.4 miles) south-west. 3 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.

Historic places
NameWhat it isFrom the middle of the street
The BeechesListed building, Grade II*620 m (0.4 miles) south-west
Natural landmarks within 5 km (3.1 miles)
NameWhat it isFrom the middle of the street
Royalty WoodWood700 m (0.4 miles) west
Clough WoodWood820 m (0.5 miles) south-east
Greenbank WoodWood1 km (0.6 miles) south
Marshalls ArmLake or reservoir1.1 km (0.7 miles) south-east
Castle HillHill1.2 km (0.8 miles) north-east
Gunners CloughValley2.4 km (1.5 miles) north

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)6.84010
Fine particles (PM2.5)6.1205
Particles (PM10)9.84015

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 6410
55 to 5940
Under 552833

5 of the street's 33 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 Cheshire West and Chester: see them on the Cheshire West and Chester 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
Winnington Park Community Primary and Nursery SchoolPrimary3–11370 m Report card (May 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
Hartford Church of England High SchoolSecondary11–16620 m (0.4 miles) Good (Jun 2023, overall grade under the previous framework)
Charles Darwin Community Primary SchoolPrimary4–11750 m (0.5 miles) Report card (Jan 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Strong standard; Inclusion: Strong standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met
St Nicholas Catholic High School Roman CatholicSecondary11–18770 m (0.5 miles) Good (Mar 2024, overall grade under the previous framework)
St Wilfrid's Catholic Primary School Roman CatholicPrimary5–11770 m (0.5 miles) No published inspection
Hartford Manor Primary School & NurseryPrimary3–11850 m (0.5 miles) Good (Apr 2023, overall grade under the previous framework)
Kingsmead Primary SchoolPrimary4–111.3 km (0.8 miles) Good (Jan 2024, overall grade under the previous framework)
Sir John Deane's Sixth Form College16 plus16–191.3 km (0.8 miles) No published inspection
Hartford Primary SchoolPrimary4–111.5 km (1 mile) Good (Nov 2021, overall grade under the previous framework)
St Bede's Catholic Primary School, Weaverham Roman CatholicPrimary4–112 km (1.2 miles) Good (Oct 2023, overall grade under the previous framework)
Witton Church Walk CofE Aided Nursery and Primary School Church of EnglandPrimary2–112 km (1.2 miles) No overall grade (Jan 2025, 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 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
Greenbank Balti CW8 4ALTakeaway/sandwich shop120 m2 Improvement necessary10 Dec 2025
Greenbank Hotel CW8 4AGPub/bar/nightclub160 m1 Major improvement necessary30 Jul 2026
VimStop CW8 4AGRetailers - other170 m3 Generally satisfactory26 Mar 2026
Christ Church Greenbank CW8 4AGRestaurant/Cafe/Canteen210 m5 Very good3 Jun 2026
Winnington Park Primary School and Nursery CW8 4AZSchool/college/university220 m5 Very good1 Jul 2025
Winnington Winners Before And After School Club CW8 4AZSchool/college/university220 m4 Good23 Apr 2026
Go Local CW8 1JGRetailers - other360 m5 Very good24 Oct 2023
Fortune House CW8 1JGTakeaway/sandwich shop370 m5 Very good16 Jul 2026
Abbies Pizza & Grill CW8 1JQTakeaway/sandwich shop370 m5 Very good10 Dec 2025
A and R Minimarket CW8 1JQRetailers - other380 m4 Good4 Sep 2024
Sainsburys CW8 1LGRetailers - supermarkets/hypermarkets440 m (0.3 miles)5 Very good16 Jul 2026
Winnington Park Rugby Football Club CW8 3AARestaurant/Cafe/Canteen440 m (0.3 miles)5 Very good27 May 2026
Cartwheel Cafe CW8 4BGRestaurant/Cafe/Canteen490 m (0.3 miles)5 Very good18 May 2026
Skamp's Catering Services CW8 4BGMobile caterer490 m (0.3 miles)5 Very good10 Dec 2024

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.

30 recorded crimes by category
CategoryCrimes
Violence and sexual offences12
Vehicle crime5
Criminal damage and arson3
Anti-social behaviour3
Public order3
Other theft2
Burglary1
Other crime1

Most of these are attached to: On or near Manor Street (7); On or near Parking Area (5); On or near Sports/Recreation Area (3); On or near Cloverdale (2); On or near Hillside (2).

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: 500 residents in 242 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 age4840
Children under 1515%17%
Aged 65 and over22%18%

Homes

Around this streetEngland
Owned (outright or with a mortgage)78%61%
Owned outright38%33%
Shared ownershipunder 1%1%
Social rented2%17%
Private rented20%21%

Work and commuting

Around this streetEngland
Adults (16 and over) in work65%57%
Unemployment (of those working or looking for work)2%6%
Retired (of adults)25%22%
Long-term sick or disabled (of adults)3%4%
Work mainly from home (of those in work)36%32%
Travel to work by car or van55%48%
By train, Underground, metro or tram1%4%
By any public transport, including bus2%8%
On foot or by bicycle6%10%
Work within 10 km (6 miles) of home (of those who travel to work)48%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)35%34%
No qualifications13%18%
Apprenticeship as highest qualification8%5%
Main language English (aged 3 and over)99%91%
Cannot speak English well or at allunder 1%2%

Deprivation

The neighbourhood around this street is in decile 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.

  • CW8 4TD: 32 addresses of 34 in the postcode
  • CW8 4TL: 1 address of 18 in the postcode

Nearby streets

Blossom Heights · Mulberry Rise · Foxendale Close · Cheshire View · Squirrel Close · Sydney Street · Kestrel Road · Field Close · Blossoms Heights · The Hawthorns · Redgate · Cloverdale

All the streets in CW8 and across Cheshire West and Chester.

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.