Southdown Terrace Steyning, Horsham
13 addresses across 2 postcodes (BN44), about 90 m long, classed as a restricted local access road. USRN 17602203.
- Sales: 18 recorded sales since 1995; in 2022 the median was £681,000 across 1 sale.
- Prices and rents: A typical home in Horsham cost £441,491 in August 2026 (-0.5% on a year); private rents averaged £1,490 a month.
- Energy: 8 homes have an energy certificate (C: 1, D: 2, E: 5).
- Flood: No address on its postcodes is in an area at high or medium risk of flooding from rivers, the sea or surface water.
- Recorded floods: No recorded flood covers the centre of any of its postcodes.
- Landfill: 1 historic landfill site within 500 m (0.3 miles) of its postcodes; the nearest, Kings Barn Farm, is 250 m away.
- Storm overflows: 4 storm overflows within 1 km (0.6 miles) spilled 34 times (150 hours) in 2025.
- Radon: Up to 5 to 10% of homes in the 1 km squares around it are estimated to be at or above the radon Action Level.
- Council tax: Most homes around it are in council tax band E; Band D in Horsham costs £2,441 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Lancing, about 6.9 km (4.3 miles) away in a straight line.
- Green space: The nearest park or garden is about 100 m away.
- Air: Background air pollution in 2024 was 6.2 µg/m³ of nitrogen dioxide and 6.3 of PM2.5, within UK legal limits.
- Height: Its addresses are 10 to 14 m above sea level.
- Noise: 2 of its 13 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Steyning Health Centre, about 550 m (0.3 miles) away.
- People: About 590 people lived in the census areas around it in 2021; 83% of households owned their home and 49% of adults held a degree or other higher qualification.
- Crime: 11 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
- Road safety: 2 collisions in which someone was hurt were reported on and around it in 2021 to 2025, 2 of them fatal or serious.
£9.99 The Street Dossier Full Report for a home on Southdown Terrace: its own records, questions to ask the seller and everything on this page, in one PDF. Choose the home
House sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2022 | 1 | £681,000 | £681,000 | £681,000 |
| 2021 | 2 | £416,750 | £393,500 | £440,000 |
| 2017 | 1 | £585,000 | £585,000 | £585,000 |
| 2012 | 1 | £399,250 | £399,250 | £399,250 |
| 2010 | 1 | £235,000 | £235,000 | £235,000 |
| 2009 | 1 | £368,150 | £368,150 | £368,150 |
| 2006 | 2 | £385,000 | £380,000 | £390,000 |
| 2005 | 1 | £188,500 | £188,500 | £188,500 |
| 2002 | 1 | £250,000 | £250,000 | £250,000 |
| 2001 | 2 | £227,500 | £185,000 | £270,000 |
| 2000 | 2 | £257,000 | £249,000 | £265,000 |
| 1997 | 1 | £139,950 | £139,950 | £139,950 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 6 Oct 2000 | 1 BN44 3YJ | Terraced | £265,000 | |
| 13 Jun 1997 | 1 BN44 3YJ | Terraced | £139,950 | |
| 15 Sep 2017 | 2 BN44 3YJ | Terraced | £585,000 | |
| 25 Oct 2012 | 2 BN44 3YJ | Terraced | £399,250 | |
| 24 Feb 2022 | 3 BN44 3YJ | Terraced | £681,000 | |
| 28 Jan 2009 | 3 BN44 3YJ | Terraced | £368,150 | |
| 7 Jul 2006 | 4 BN44 3YJ | Terraced | £390,000 | |
| 27 Oct 2000 | 4 BN44 3YJ | Terraced | £249,000 | |
| 28 Apr 1995 | 4 BN44 3YJ | Terraced | £91,000 | |
| 5 Dec 2001 | 5 BN44 3YJ | Terraced | £270,000 | |
| 8 Jun 2006 | 8 BN44 3YJ | Semi-detached | £380,000 | |
| 12 Jul 2002 | 8 BN44 3YJ | Semi-detached | £250,000 | |
| 4 Dec 1996 | 8 BN44 3YJ | Semi-detached | £115,000 | |
| 29 Sep 2021 | 9 BN44 3YJ | Detached | £440,000 | |
| 24 Aug 2001 | 9 BN44 3YJ | Detached | £185,000 | |
| 29 Jan 2021 | 10 BN44 3YJ | Semi-detached | £393,500 | |
| 9 Apr 2010 | 10 BN44 3YJ | Semi-detached | £235,000 | |
| 6 May 2005 | 10 BN44 3YJ | Semi-detached | £188,500 | New build. |
House prices and rents in Horsham
A typical home in Horsham cost £441,491 in August 2026, 0.5% less than a year before. That is 13% more than five years earlier and 18% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £763,686 |
| Semi-detached | £462,399 |
| Terraced | £372,425 |
| Flat or maisonette | £216,988 |
| Bought by a first-time buyer | £324,417 |
Private renters in Horsham paid £1,490 a month on average in September 2026, 4.8% more than a year before. That is 35% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £1,033 |
| Two bedrooms | £1,366 |
| Three bedrooms | £1,718 |
| Four or more bedrooms | £2,454 |
Energy performance certificates
8 homes with a current certificate; median floor area 149 m². Most common: House, mid-terrace (4); House, semi-detached (3); House, end-terrace (1). Built: before 1900 (5); 1976-1982 (2); 1967-1975 (1). Tenure at assessment: owner-occupied (7); rented (private) (1).
Each home's certificates and sales (8 addresses)
Gas and electricity use
Homes with gas used 15,138 kWh of it on average in 2024, 24% more than the district's 12,178 kWh, and 2,703 kWh of electricity, 26% less than the district's 3,676 kWh. There are gas meters for about 100% of the homes.
These are all the homes on each postcode, whatever their size and however many live in them, so they show the kind of homes and heating here rather than what any one home uses. The typical figure is the median: half the homes used less. The district is BN44.
Council tax
What each band costs in Horsham in 2026-27: Band D £2,441 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,627 | £1,899 | £2,170 | £2,441 | £2,983 | £3,526 | £4,068 | £4,882 |
Homes by band in the neighbourhoods around this street: most are in band E (24% of about 1,560 homes).
Planning and heritage
- Conservation area: yes, Steyning Conservation Area (council page). 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: 7 protected trees on or by this street.
- Green belt: no.
Energy projects nearby
2 energy projects near the street's postcodes.
| Project | Kind | Size | Stage | Distance |
|---|---|---|---|---|
| Kings Barn Farm - Energy Barn Horsham DC/16/1648 | Battery storage | 10 MW | Operational Mar 2017 | 360 m |
| Horton Landfill Site | Landfill Gas | 2 MW | Operational Dec 1996 | 2.6 km (1.6 miles) |
Planned projects can change or not go ahead; search the planning authority's applications by the reference shown for the plans, conditions and any objections. Construction brings traffic for some months; once built, solar farms and batteries are usually quiet, while turbines and waste plants can be seen or heard further away.
Roadworks
No street works under way, planned or finished in the last three months on this street, in permits up to 31 October 2026.
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.
Recorded floods
No recorded flood covers the centre of any of this street's postcodes.
Recorded floods are where floodwater was seen or surveyed after a flood. Many floods were never mapped, an outline over a postcode's centre does not mean every home in it flooded, and homes outside one may have. Ask the seller whether the home itself has flooded.
Coastal erosion
No projected coastal erosion zone is within 1 km (0.6 miles) of the street's postcodes.
Storm overflows
4 storm overflows within 1 km (0.6 miles) of the street's postcodes spilled 34 times, for 150 hours in all, in 2025. They discharge into Tributary of River Adur, The River Adur, Freshwater River, Black Sewer Trib of River Adur.
| Overflow | Into | Spills | Hours | Distance |
|---|---|---|---|---|
| Abbey Road Steyning Cso Southern Water | Tributary of River Adur | 14 | 19 | 260 m |
| Wykeham Close Steyning Cso Southern Water; monitored 25% of the year | The River Adur | 2 | 1 | 270 m |
| Kingsbarn Lane Pumping Station Southern Water | Freshwater River | 1 | 0 | 480 m (0.3 miles) |
| Steyning Wwtw Southern Water | Black Sewer Trib of River Adur | 17 | 130 | 790 m (0.5 miles) |
A storm overflow lets sewage diluted with rainwater into a river, stream or the sea when heavy rain overwhelms the sewers, so the spills here affect the water they run into, not homes. A spill is counted the regulators' way: a first 12 hours, then each 24 hours it goes on.
Coal mining
No postcode centre on the street is in a coalfield: the Mining Remediation Authority records no coal mining risk here.
Radon
The highest radon potential in the 1 km squares around the street's postcodes is 5 to 10%: up to that share of homes there is estimated to be at or above the Action Level of 200 becquerels per cubic metre. At least part of that area is a radon Affected Area, where 1% or more of homes are.
Radon is a natural radioactive gas from the ground that can build up indoors; long exposure raises the risk of lung cancer. A three-month test with two small detectors is the only way to know a home's level, and a high level can usually be brought down with a sump or better ventilation. Homes built here in recent decades should have radon protection under the building regulations (basic protection from 3%, full protection from 10%). UKHSA sells a radon report for a single address from its detailed map at ukradon.org.
Historic landfill
1 historic landfill site is within 500 m (0.3 miles) of the street's postcodes, the nearest 250 m away.
| Site | Waste went in | Waste | Distance |
|---|---|---|---|
| Kings Barn Farm Steyning, Sussex | 1960 to 1977 | Inert, industrial, commercial, household | 250 m |
Closed tips can give off gas (methane and carbon dioxide) and leak into the ground for years. An environmental search, which conveyancers usually order, looks at landfill and contaminated land around the home; the council keeps a register of land it has found to be contaminated.
Height above sea level
The street's 13 addresses are between 10 m and 14 m above sea level (12 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| BN44 3YJ | 100% | 100% | 100% | 0% |
| BN44 3YN | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Lancing 980,000 journeys in 2024–25 | 6.9 km (4.3 miles) |
| Shoreham-By-Sea 1.3 million journeys in 2024–25 | 7.1 km (4.4 miles) | |
| East Worthing 471,000 journeys in 2024–25 | 7.9 km (4.9 miles) | |
| Bus stops | 4 stops within 400 m (0.2 miles), 18 within 800 m (0.5 miles); nearest Thornscroft Steyning | 330 m |
| Bus or coach station | Sainsbury's West Hove Portslade | 9.8 km (6.1 miles) |
| EV charging points | 8 within 1.6 km (1 mile); nearest Fletchers Croft Car Park | 210 m |
| Airport with scheduled flights | London Gatwick Airport LGW | 30.4 km (19 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 1 practice within 1.6 km (1 mile); nearest Steyning Health Centre Good Aug 2017 | 550 m (0.3 miles) |
| Pharmacies | 2 pharmacies within 1.6 km (1 mile); nearest Steyning Pharmacy | 550 m (0.3 miles) |
| NHS dentists | 3 practices within 1.6 km (1 mile); nearest Dental Surgery | 350 m |
| Hospital | Southlands Hospital Good Oct 2019 | 7.1 km (4.4 miles) |
| Care homes | 1 home within 1.6 km (1 mile); nearest Croft Meadow Good Sep 2022 | 550 m (0.3 miles) |
| Police station | Steyning Police Station | 590 m (0.4 miles) |
| Cash machines | 2 machines within 800 m (0.5 miles); nearest The West Sussex Phobia Clinic | 430 m (0.3 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 2 within 800 m (0.5 miles); nearest Unnamed 1.1 ha | 100 m |
| Largest park within 800 m (0.5 miles) | Unnamed 1.8 ha | 260 m |
| Play area | 4 within 800 m (0.5 miles); nearest Unnamed 930 m² | 160 m |
| Playing field | 2 within 800 m (0.5 miles); nearest Unnamed 1.2 ha | 520 m (0.3 miles) |
| Allotments | The Rublees 1.3 ha | 870 m (0.5 miles) |
Within 800 m (0.5 miles): 2 parks and gardens, 2.9 hectares in all.
Landmarks
The nearest historic landmark is The Parish Church of St Andrew, a listed building (Grade I), 190 m west. 116 listed buildings are within 1 km (0.6 miles), 4 of them Grade I and 7 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| The Parish Church of St Andrew | Listed building, Grade I | 190 m west |
| Chantry House | Listed building, Grade II* | 370 m west |
| Brotherhood Hall, 9, Church Street | Listed building, Grade I | 370 m west |
| 1, 3 and 5, Church Street | Listed building, Grade II* | 400 m (0.2 miles) south-west |
| Bramber Castle | Scheduled monument | 760 m (0.5 miles) south-east |
| Group of salterns and a possible moat 250m east of Bramber Castle | Scheduled monument | 910 m (0.6 miles) south-east |
| Group of salterns north of St Peter's Church | Scheduled monument | 1.1 km (0.7 miles) east |
| Name | What it is | From the middle of the street |
|---|---|---|
| Nash Wood | Wood | 1.2 km (0.8 miles) north |
| Wet Copse | Wood | 1.9 km (1.2 miles) north-west |
| Lime Shaw | Wood | 2 km (1.2 miles) north-west |
| Wiston Pond | Lake or reservoir | 2.2 km (1.3 miles) north-west |
| Steyning Round Hill | Hill | 2.3 km (1.4 miles) south-west |
| Winding Bottom | Valley | 2.5 km (1.5 miles) south |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 6.2 | 40 | 10 |
| Fine particles (PM2.5) | 6.3 | 20 | 5 |
| Particles (PM10) | 9.8 | 40 | 15 |
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
| Level | Road traffic | Railways |
|---|---|---|
| 60 to 64 | 1 | 0 |
| 55 to 59 | 1 | 0 |
| Under 55 | 11 | 13 |
2 of the street's 13 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 Horsham: see them on the Horsham page.
Nearest schools
| School | Phase | Ages | Distance | Inspection | Exam results |
|---|---|---|---|---|---|
| Steyning Grammar School Church of England | Secondary | 11–18 | 650 m (0.4 miles) | Report card (Mar 2026): Curriculum and teaching: Expected standard; Achievement: Expected standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Post-16 provision: Expected standard; Safeguarding standards: Met | GCSE 2026 (provisional): Attainment 8 48.0 (48.7 in 2025 and 45.1 in 2024); 46.3% grade 5+ in English and maths A level 2025: average grade C; 13.9% AAB or better; progress average |
| Steyning CofE Primary School Church of England | Primary | 4–11 | 740 m (0.5 miles) | No published inspection | 58% at the expected standard in reading, writing and maths, 9% at the higher standard (2025; 48% in 2024 and 48% in 2023) |
| Upper Beeding Primary School | Primary | 4–11 | 1.5 km (0.9 miles) | No overall grade (Feb 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good | 61% at the expected standard in reading, writing and maths, 4% at the higher standard (2025; 50% in 2024 and 58% in 2023) |
Exam results are from the Department for Education's school performance tables (Explore Education Statistics, Open Government Licence), for all pupils at each school. The middle school in England had 63% at the expected standard at the end of primary school (2025), Attainment 8 of 46.0 at GCSE (2026) and an A level average of C+ (2025). Attainment 8 adds up a pupil's grades in eight GCSEs, with English and maths counted twice (90 is the most), averaged over the school's pupils. Progress 8 compares pupils with others who had the same results at the end of primary school; it is not published for GCSEs in 2025 and 2026, as those pupils sat no primary tests during the pandemic. Small year groups swing from year to year, and figures for very small ones are withheld.
Nurseries and childcare
3 nurseries, pre-schools and clubs within 1.5 km (0.9 miles), the nearest 220 m from the middle of the street.
| Provider | Kind | Places | Latest inspection | Distance |
|---|---|---|---|---|
| Southdown Nursery BN44 3GL | Sessional day care | 26 | Outstanding (May 2023, overall grade under the previous framework) | 220 m |
| The Outdoors Project After School Club At Steyning C Of E Primary School BN44 3RQ | Out-of-school day care (over fives) | Not inspected yet | 490 m (0.3 miles) | |
| The Hive Sussex BN44 3RQ | Out-of-school day care | 20 | Not inspected yet | 490 m (0.3 miles) |
Ofsted also registers 388 childminders and 67 home childcarers (nannies) in West Sussex. It does not publish their addresses, so they cannot be shown here; the council's family information service lists those taking children.
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| BN44 Community Fridge BN44 3YL | Distributors/Transporters | 140 m | 5 Very good | 7 Sep 2022 |
| Accent Catering @ Steyning Grammar School - Church Street BN44 3LB | School/college/university | 230 m | Awaiting inspection | |
| Southdown Nursery BN44 3GL | Other catering premises | 250 m | 5 Very good | 24 Apr 2024 |
| Petal and Bean BN44 3YB | Restaurant/Cafe/Canteen | 350 m | Awaiting inspection | |
| Croft Meadow BN44 3RJ | Hospitals/Childcare/Caring Premises | 470 m (0.3 miles) | 5 Very good | 2 Dec 2025 |
| Big Fish BN44 3RD | Retailers - other | 470 m (0.3 miles) | 4 Good | 14 Apr 2026 |
| The White Horse Inn Smoke House & Grill BN44 3YE | Pub/bar/nightclub | 470 m (0.3 miles) | 5 Very good | 25 Jun 2024 |
| Twenty-Seven BN44 3YE | Pub/bar/nightclub | 480 m (0.3 miles) | 5 Very good | 25 Jan 2024 |
| Martins/Mc Colls BN44 3RD | Retailers - other | 500 m (0.3 miles) | 5 Very good | 3 Apr 2023 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 4 |
| Anti-social behaviour | 2 |
| Other theft | 2 |
| Other crime | 1 |
| Criminal damage and arson | 1 |
| Vehicle crime | 1 |
Most of these are attached to: On or near Market Field (5); On or near Church Mead (2); On or near Jarvis Lane (1); On or near Abbey Road (1); On or near Southdown Terrace (1).
Road safety
2 collisions in which someone was hurt were reported on and around the street in 2021 to 2025: 0 fatal, 2 serious and 0 slight, in which 3 people were seriously hurt. 1 involved a cyclist. Most were on roads with a 60 mph limit.
| Year | Collisions | Fatal or serious |
|---|---|---|
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| Date | Severity | Who was hurt | Road | Conditions |
|---|---|---|---|---|
| 4 Oct 2025 10:14 | Serious | 1 person: 1 cyclist | Minor road, 30 mph | Daylight |
| 5 Aug 2022 17:50 | Serious | 2 people | A283, 60 mph | Daylight |
Only collisions in which someone was hurt and which the police were told about are here: damage-only collisions and near misses are not, and some injuries are never reported. Positions are recorded by the police, usually to within a few metres. Each year's figures are published the following September.
Traffic on nearby roads
No traffic count point is within 500 m (0.3 miles) of the street's postcodes. The Department for Transport counts every motorway and A road and only a sample of minor roads, so a quiet residential street usually has none.
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 53 | 40 |
| Children under 15 | 12% | 17% |
| Aged 65 and over | 30% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 83% | 61% |
| Owned outright | 53% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 3% | 17% |
| Private rented | 15% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 59% | 57% |
| Unemployment (of those working or looking for work) | 5% | 6% |
| Retired (of adults) | 30% | 22% |
| Long-term sick or disabled (of adults) | 2% | 4% |
| Work mainly from home (of those in work) | 50% | 32% |
| Travel to work by car or van | 44% | 48% |
| By train, Underground, metro or tram | under 1% | 4% |
| By any public transport, including bus | 1% | 8% |
| On foot or by bicycle | 4% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 40% | 65% |
| Work 30 km (19 miles) or more away | 13% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 49% | 34% |
| No qualifications | 10% | 18% |
| Apprenticeship as highest qualification | 3% | 5% |
| Main language English (aged 3 and over) | 99% | 91% |
| Cannot speak English well or at all | 0% | 2% |
Deprivation
The 2 neighbourhoods around this street are in deciles 9 to 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.
What has changed
- Food hygiene ratings Petal and Bean (restaurant/cafe/canteen, BN44 3YB) newly listed: Awaiting inspection found 4 November 2026
Postcodes on this street
Nearby streets
Market Field · Cripps Lane · King Alfred Close · Church Mead · Vicarage Lane · King's Barn Villas · Holland Road · Rosemary Avenue · Vicarage Lane · King's Barn Lane · Church Lane · Rosemary Close
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; road collisions count only those in which someone was hurt and the police were told.
- 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.