Post Office Lane Flax Bourton, North Somerset
44 addresses across 4 postcodes (BS48), about 430 m (0.3 miles) long, classed as a local road. USRN 47830135.
- Sales: 33 recorded sales since 1995; in 2026 the median was £650,000 across 1 sale.
- Prices and rents: A typical home in North Somerset cost £314,307 in August 2026 (+3.6% on a year); private rents averaged £1,212 a month.
- Energy: 20 homes have an energy certificate (C: 1, D: 3, E: 8, F: 7, G: 1).
- Flood: 1 address on its postcodes is in areas 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.
- Radon: Up to 10 to 30% of homes in the 1 km squares around it are estimated to be at or above the radon Action Level.
- Gas: No gas meters are recorded on its postcodes: it looks to be off the mains gas grid.
- Council tax: Most homes around it are in council tax band G; Band D in North Somerset costs £2,491 a year in 2026-27.
- Broadband: Gigabit broadband is available to 0% to 100% of premises.
- Transport: The nearest railway station is Nailsea and Backwell, about 2.7 km (1.7 miles) away in a straight line.
- Green space: The nearest park or garden is about 2.6 km (1.6 miles) away.
- Air: Background air pollution in 2024 was 7.1 µg/m³ of nitrogen dioxide and 5.8 of PM2.5, within UK legal limits.
- Height: Its addresses are 30 to 39 m above sea level.
- Noise: 7 of its 44 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Tyntesfield Medical Group, about 3.5 km (2.2 miles) away.
- People: About 680 people lived in the census areas around it in 2021; 78% of households owned their home and 41% of adults held a degree or other higher qualification.
- Crime: 7 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
- Road safety: No collisions in which someone was hurt were reported on and around it in 2021 to 2025.
£9.99 The Street Dossier Full Report for a home on Post Office Lane: 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 |
|---|---|---|---|---|
| 2026 | 1 | £650,000 | £650,000 | £650,000 |
| 2024 | 1 | £530,000 | £530,000 | £530,000 |
| 2021 | 1 | £450,000 | £450,000 | £450,000 |
| 2018 | 3 | £870,000 | £577,500 | £950,000 |
| 2017 | 1 | £950,000 | £950,000 | £950,000 |
| 2016 | 2 | £442,500 | £320,000 | £565,000 |
| 2015 | 1 | £512,354 | £512,354 | £512,354 |
| 2014 | 1 | £875,000 | £875,000 | £875,000 |
| 2013 | 1 | £675,000 | £675,000 | £675,000 |
| 2011 | 1 | £685,000 | £685,000 | £685,000 |
| 2009 | 1 | £635,000 | £635,000 | £635,000 |
| 2006 | 1 | £770,000 | £770,000 | £770,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 24 Jan 2018 | 1 BS48 3PZ | Detached | £950,000 | |
| 17 Aug 2005 | 1 BS48 3PZ | Detached | £580,000 | |
| 22 Jul 2011 | BETA, 2 BS48 3PZ | Detached | £685,000 | |
| 3 Oct 2017 | 3 BS48 3PZ | Semi-detached | £950,000 | |
| 1 Aug 2003 | 3 BS48 3PZ | Detached | £495,000 | |
| 16 Dec 2009 | 4 BS48 3PZ | Semi-detached | £635,000 | |
| 16 Jul 1997 | 4 BS48 3PZ | Semi-detached | £242,000 | |
| 10 Aug 2000 | 5 BS48 3PZ | Detached | £440,000 | |
| 11 Oct 1996 | BOURTON LODGE, 6 BS48 3PZ | Detached | £206,000 | |
| 17 Aug 2018 | CORNERS BS48 3QE | Detached | £577,500 | |
| 25 Apr 2016 | CORNERS BS48 3QE | Detached | £565,000 | |
| 28 Mar 2001 | CORNERS BS48 3QE | Detached | £230,000 | |
| 23 Jul 1999 | CORNERS BS48 3QE | Detached | £189,950 | |
| 16 Dec 2015 | LANE END BS48 3QE | Detached | £512,354 | |
| 29 Oct 1999 | LAWN COTTAGE BS48 3QE | Terraced | £122,000 | |
| 20 Jul 2026 | MULBERRY COTTAGE BS48 3QE | Semi-detached | £650,000 | |
| 22 Apr 2005 | MULBERRY COTTAGE BS48 3QE | Semi-detached | £380,000 | |
| 18 Apr 2000 | NAISH HOUSE BS48 3QE | Semi-detached | £415,500 | |
| 1 Apr 2021 | OLD POST OFFICE BS48 3QE | Semi-detached | £450,000 | |
| 26 Sep 2001 | OLD POST OFFICE BS48 3QE | Semi-detached | £190,000 | |
| 27 Nov 1996 | PRIORY BARN BS48 3QE | Detached | £220,000 | New build. |
| 31 Mar 2000 | PRIORY HOUSE BS48 3QE | Detached | £230,000 | |
| 21 Aug 2018 | SPRINGFIELDS BS48 3QE | Detached | £870,000 | |
| 10 Nov 2017 | SPRINGFIELDS BS48 3QE | Detached | £845,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 26 Sep 2014 | ST. MICHAELS HOUSE BS48 3QE | Terraced | £875,000 | |
| 22 Sep 2006 | ST. MICHAELS HOUSE BS48 3QE | Terraced | £770,000 | |
| 1 Sep 2003 | ST MICHAELS COTTAGE BS48 3QE | Semi-detached | £380,000 | |
| 6 Jul 2001 | ST MICHAELS COTTAGE BS48 3QE | Semi-detached | £299,000 | |
| 29 May 1998 | THE BARN BS48 3QE | Semi-detached | £229,000 | New build. |
| 1 Nov 2013 | THE SHIPPON BS48 3QE | Semi-detached | £675,000 | |
| 6 Sep 2024 | YEW COTTAGE BS48 3QE | Semi-detached | £530,000 | |
| 11 Mar 2016 | YEW COTTAGE BS48 3QE | Semi-detached | £320,000 | |
| 3 Nov 2000 | YEW COTTAGE BS48 3QE | Detached | £185,000 |
House prices and rents in North Somerset
A typical home in North Somerset cost £314,307 in August 2026, 3.6% more than a year before. That is 16% more than five years earlier and 34% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £536,372 |
| Semi-detached | £342,114 |
| Terraced | £274,586 |
| Flat or maisonette | £169,859 |
| Bought by a first-time buyer | £246,206 |
Private renters in North Somerset paid £1,212 a month on average in September 2026, 3.1% more than a year before. That is 40% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £822 |
| Two bedrooms | £1,082 |
| Three bedrooms | £1,350 |
| Four or more bedrooms | £1,851 |
Energy performance certificates
20 homes with a current certificate; median floor area 186 m². Most common: House, detached (11); House, semi-detached (4); Bungalow, detached (2). Built: before 1900 (7); 1983-1990 (6); 1967-1975 (3). Tenure at assessment: owner-occupied (14); rented (private) (1).
Each home's certificates and sales (20 addresses)
- 1, Post Office Lane, Flax Bourton
- 3 Post Office Lane, Flax Bourton
- 4, Post Office Lane, Flax Bourton
- Ashley House, Post Office Lane, Flax Bourton
- Beta, 2 Post Office Lane, Flax Bourton
- Ciro, Post Office Lane, Flax Bourton
- Corners, Post Office Lane, Flax Bourton
- Cosy Cottage, Church Walk, Flax Bourton
- Lane End, Post Office Lane
- Martlet, Church Walk, Flax Bourton
- Mulberry Cottage, Post Office Lane, Flax Bourton
- OLD POST OFFICE, POST OFFICE LANE, FLAX BOURTON
- Priory Barn, Post Office Lane, Flax Bourton
- Springfields, Post Office Lane, Flax Bourton
- ST MICHAELS HOUSE, POST OFFICE LANE
- The Cider House, Post Office Lane, Flax Bourton
- The Shippon, Post Office Lane, Flax Bourton
- The Stables, Post Office Lane, Flax Bourton
- Three Acres, Post Office Lane, Flax Bourton
- Yew Cottage, Post Office Lane, Flax Bourton
Gas and electricity use
No gas meters are recorded on the street's postcodes, against 34 electricity meters: it looks to be off the mains gas grid, or almost, with heating from electricity, oil, LPG or solid fuel.
| Postcode | Electricity meters | Typical electricity | Gas meters | Typical gas |
|---|---|---|---|---|
| BS48 3QE | 28 | 4,712 kWh | none recorded | |
| BS48 3PZ | 6 | 6,867 kWh | under 5 |
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 BS48.
Council tax
What each band costs in North Somerset in 2026-27: Band D £2,491 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,661 | £1,938 | £2,214 | £2,491 | £3,045 | £3,598 | £4,152 | £4,982 |
Homes by band in the neighbourhoods around this street: most are in band G (28% of about 1,340 homes).
Planning and heritage
- Conservation area: no postcode centre in this street's postcodes is in one.
- Listed buildings on or by this street: 7.
- Article 4 direction (removing permitted development rights): none recorded, though not every council has published theirs.
- Tree preservation orders: 9 protected trees on or by this street.
- Green belt: yes, North Somerset.
Listed buildings
- BANKSIAN HOUSE AND COSY COTTAGE, grade II
- CASTLE FARMHOUSE, grade II
- CHURCH FARMHOUSE, grade II
- PRIORY FARMHOUSE, grade II
- ROSE COTTAGE, grade II
- ST MICHAEL'S HOUSE AND COTTAGE, grade II
- UNKNOWN MONUMENT IN THE CHURCHYARD AND TO THE WEST OF ST MICHAEL'S CHURCH, grade II
Energy projects nearby
No wind turbine or waste plant within 5 km (3.1 miles), and no solar farm, battery site or other project of 1 MW or more within 2 km (1.2 miles), of the street's postcodes, operating or planned.
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
Rivers, the sea or surface water: in this street's postcodes, 1 address is in areas at high risk, 0 at medium risk and 8 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.
| Postcode | Planning zone | Addresses at high / medium / low risk | Groundwater |
|---|---|---|---|
| BS48 3QE | not in 2 or 3 | 1 / 0 / 5 | unlikely |
| BS48 3PZ | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| BS48 3PY | not in 2 or 3 | 0 / 0 / 3 | unlikely |
| BS48 3EQ | not in 2 or 3 | 0 / 0 / 0 | unlikely |
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
No storm overflow outlet is within 1 km (0.6 miles) of the street's postcodes.
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 10 to 30%: 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
No historic landfill site is within 500 m (0.3 miles) of the street's postcodes.
Height above sea level
The street's 44 addresses are between 30 m and 39 m above sea level (37 m on average); the ground rises about 9 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| BS48 3EQ | 0% | 0% | 0% | 67% |
| BS48 3PY | 100% | 100% | 100% | 0% |
| BS48 3PZ | 100% | 100% | 100% | 0% |
| BS48 3QE | 100% | 96% | 96% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Nailsea and Backwell 476,000 journeys in 2024–25 | 2.7 km (1.7 miles) |
| Shirehampton 64,000 journeys in 2024–25 | 7.2 km (4.5 miles) | |
| Parson Street 204,000 journeys in 2024–25 | 7.4 km (4.6 miles) | |
| Bus stops | 3 stops within 400 m (0.2 miles), 6 within 800 m (0.5 miles); nearest Post Office Lane Flax Bourton | 220 m |
| Bus or coach station | Public Transport Interchange Bristol Airport | 3.9 km (2.5 miles) |
| Ferry terminal | Nova Scotia Ferry Landing Hotwells | 7.1 km (4.4 miles) |
| Car parks | Hawthorns Parking | 1.9 km (1.2 miles) |
| EV charging points | bp pulse Charging Station | 5.6 km (3.5 miles) |
| Airport with scheduled flights | Bristol Airport BRS | 4.5 km (2.8 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | Tyntesfield Medical Group Good Mar 2017 | 3.5 km (2.2 miles) |
| Pharmacies | Cohen Chemists | 2.2 km (1.4 miles) |
| NHS dentists | Backwell Dental Care | 2.2 km (1.4 miles) |
| Hospital | Bft Southmead The Bristol Nuffield Hospital Good Sep 2026 | 7.5 km (4.7 miles) |
| Care homes | 1 home within 1.6 km (1 mile); nearest The Rambles Care Home Good Aug 2021 | 1.4 km (0.9 miles) |
| Police station | Nailsea Police Station - Avon And Somerset Police | 4.1 km (2.6 miles) |
| Cash machines | Esso Congresbury | 2.1 km (1.3 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | Unnamed 2.7 ha | 2.6 km (1.6 miles) |
| Play area | Unnamed 680 m² | 1.1 km (0.7 miles) |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 2.0 ha | 320 m |
| Allotments | Fairfield Mead Allotments 1.4 ha | 1 km (0.6 miles) |
Landmarks
The nearest historic landmark is Church of St Michael and All Angels, a listed building (Grade II*), 220 m south-east. 22 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| Church of St Michael and All Angels | Listed building, Grade II* | 220 m south-east |
| Barrow Court | Registered park or garden, Grade II | 1.4 km (0.9 miles) south-east |
| Tyntesfield | Registered park or garden, Grade II* | 1.7 km (1 mile) north |
| Churchyard cross in St Andrew's churchyard | Scheduled monument | 1.8 km (1.1 miles) south-west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Bathing Pond Wood | Wood | 630 m (0.4 miles) north |
| Bathing Pond | Lake or reservoir | 680 m (0.4 miles) north |
| Gable Wood | Wood | 780 m (0.5 miles) north |
| Watercress Wood | Wood | 1.1 km (0.7 miles) north-west |
| Bourton Combe | Valley | 1.6 km (1 mile) south |
| Farleigh Hill | Hill | 1.9 km (1.2 miles) south-east |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 7.1 | 40 | 10 |
| Fine particles (PM2.5) | 5.8 | 20 | 5 |
| Particles (PM10) | 10.3 | 40 | 15 |
All three are within the UK legal limits; PM2.5 is above the WHO guideline, as in most towns and cities.
Road, rail and aircraft noise
| Level | Road traffic | Railways | Aircraft |
|---|---|---|---|
| 70 to 74 | 1 | 0 | 0 |
| 65 to 69 | 4 | 0 | 0 |
| 60 to 64 | 2 | 0 | 0 |
| Under 55 | 37 | 44 | 44 |
7 of the street's 44 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 Somerset: see them on the North Somerset page.
Nearest schools
| School | Phase | Ages | Distance | Inspection | Exam results |
|---|---|---|---|---|---|
| Flax Bourton Church of England Primary School | Primary | 4–11 | 360 m | No overall grade (Apr 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good | 60% at the expected standard in reading, writing and maths, 8% at the higher standard (2025; 70% in 2024 and 68% in 2023) |
| Backwell Church of England Junior School | Primary | 7–11 | 2 km (1.2 miles) | No overall grade (Nov 2024, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good | 64% at the expected standard in reading, writing and maths, 10% at the higher standard (2025; 63% in 2024 and 73% in 2023) |
| Backwell School | Secondary | 11–18 | 2 km (1.2 miles) | Good (Jan 2020, overall grade under the previous framework) | GCSE 2026 (provisional): Attainment 8 52.6 (52.7 in 2025 and 53.4 in 2024); 59.5% grade 5+ in English and maths A level 2025: average grade C+; 16.7% AAB or better; progress average |
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 460 m (0.3 miles) from the middle of the street.
| Provider | Kind | Places | Latest inspection | Distance |
|---|---|---|---|---|
| Shine @ Flax Bourton Primary BS48 1UA | Out-of-school day care | 56 | Not inspected yet | 460 m (0.3 miles) |
| Charlton Nursery BS48 3QX | Full day care | 101 | Good (Mar 2024, overall grade under the previous framework) | 880 m (0.5 miles) |
| Red Bus Nursery & Pre-School BS48 1UL | Full day care | 96 | Outstanding (Oct 2024, overall grade under the previous framework) | 1.3 km (0.8 miles) |
Ofsted also registers 121 childminders and 19 home childcarers (nannies) in North Somerset. 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 |
|---|---|---|---|---|
| Aspens @ Flax Bourton C of E School BS48 3QJ | Other catering premises | 400 m (0.2 miles) | 5 Very good | 13 Oct 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 2 |
| Drugs | 2 |
| Anti-social behaviour | 2 |
| Other crime | 1 |
Most of these are attached to: On or near Castle Close (6); On or near Post Office Lane (1).
Road safety
No collisions in which someone was hurt were reported on and around the street in 2021 to 2025.
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 | 45 | 40 |
| Children under 15 | 19% | 17% |
| Aged 65 and over | 22% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 78% | 61% |
| Owned outright | 42% | 33% |
| Shared ownership | 1% | 1% |
| Social rented | 6% | 17% |
| Private rented | 15% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 62% | 57% |
| Unemployment (of those working or looking for work) | 2% | 6% |
| Retired (of adults) | 26% | 22% |
| Long-term sick or disabled (of adults) | 2% | 4% |
| Work mainly from home (of those in work) | 45% | 32% |
| Travel to work by car or van | 49% | 48% |
| By train, Underground, metro or tram | under 1% | 4% |
| By any public transport, including bus | under 1% | 8% |
| On foot or by bicycle | 2% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 50% | 65% |
| Work 30 km (19 miles) or more away | 3% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 41% | 34% |
| No qualifications | 14% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 98% | 91% |
| Cannot speak English well or at all | under 1% | 2% |
Deprivation
The neighbourhoods around this street are all in decile 9 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
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.
Postcodes on this street
- BS48 3QE: 32 addresses of 36 in the postcode
- BS48 3PZ: 7 addresses
- BS48 3PY: 4 addresses
- BS48 3EQ: 1 address of 19 in the postcode
Nearby streets
Castle Close · Church Lane · Church Lane End · The Grange · Bourton Mead
All the streets in BS48 and across North Somerset.
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.