Norfolk Crescent Sidcup, Bexley
194 addresses across 4 postcodes (DA15), about 660 m (0.4 miles) long, classed as a local road. USRN 20101024.
- Sales: 252 recorded sales since 1995; in 2026 the median was £422,000 across 1 sale.
- Energy: 90 homes have an energy certificate (C: 15, D: 57, E: 16, F: 1, G: 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 D; Band D in Bexley costs £2,366 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is New Eltham, about 1.4 km (0.9 miles) away in a straight line.
- Green space: The nearest park or garden, Parish Wood, is about 110 m away.
- Air: Background air pollution in 2024 was 14.0 µg/m³ of nitrogen dioxide and 8.5 of PM2.5, within UK legal limits.
- Height: Its addresses are 32 to 35 m above sea level.
- Noise: 19 of its 194 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Woodlands Surgery, about 580 m (0.4 miles) away, with 3 practices within 1.6 km (1 mile).
- People: About 940 people lived in the census areas around it in 2021; 93% of households owned their home and 25% of adults held a degree or other higher qualification.
- Crime: 65 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
Sales on this street
| Year | Sales | Median price | Lowest | Highest |
|---|---|---|---|---|
| 2026 | 1 | £422,000 | £422,000 | £422,000 |
| 2025 | 11 | £457,000 | £411,000 | £525,000 |
| 2024 | 7 | £460,000 | £398,000 | £565,000 |
| 2023 | 7 | £475,000 | £452,000 | £485,000 |
| 2022 | 7 | £442,000 | £375,000 | £485,000 |
| 2021 | 7 | £400,000 | £380,000 | £460,000 |
| 2020 | 8 | £383,998 | £352,000 | £410,000 |
| 2019 | 7 | £380,000 | £335,000 | £424,750 |
| 2018 | 4 | £377,500 | £363,000 | £396,000 |
| 2017 | 6 | £377,500 | £338,000 | £462,500 |
| 2016 | 6 | £330,500 | £299,995 | £375,000 |
| 2015 | 2 | £322,500 | £295,000 | £350,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 5 Jun 2026 | 135 DA15 8HN | Terraced | £422,000 | |
| 29 Aug 2025 | 158 DA15 8HY | Semi-detached | £525,000 | |
| 12 May 2025 | 189 DA15 8HX | Terraced | £490,000 | |
| 6 May 2025 | 42 DA15 8HW | Terraced | £475,000 | |
| 31 Mar 2025 | 40 DA15 8HW | Terraced | £432,500 | |
| 28 Mar 2025 | 149 DA15 8HN | Terraced | £505,000 | |
| 28 Mar 2025 | 109 DA15 8HN | Terraced | £487,500 | |
| 28 Mar 2025 | 57 DA15 8HW | Terraced | £450,000 | |
| 10 Mar 2025 | 147 DA15 8HN | Terraced | £457,000 | |
| 20 Feb 2025 | 53 DA15 8HW | Terraced | £425,000 | |
| 29 Jan 2025 | 114 DA15 8HY | Terraced | £411,000 | |
| 20 Jan 2025 | 101 DA15 8HN | Terraced | £420,000 | |
| 22 Nov 2024 | 5 DA15 8HW | Terraced | £460,000 | |
| 30 Sep 2024 | 97 DA15 8HN | Terraced | £410,000 | |
| 27 Sep 2024 | 9 DA15 8HW | Semi-detached | £525,000 | |
| 28 Aug 2024 | 227 DA15 8HX | Semi-detached | £565,000 | |
| 22 Aug 2024 | 136 DA15 8HY | Terraced | £398,000 | |
| 6 Jun 2024 | 64 DA15 8HY | Terraced | £435,000 | |
| 1 Feb 2024 | 71 DA15 8HW | Terraced | £475,000 | |
| 11 Dec 2023 | 139 DA15 8HN | Terraced | £452,000 | |
| 8 Dec 2023 | 142 DA15 8HY | Terraced | £475,000 | |
| 29 Nov 2023 | 20A DA15 8HW | Terraced | £475,000 | |
| 16 Aug 2023 | 75 DA15 8HN | Terraced | £475,000 | |
| 4 Aug 2023 | 18 DA15 8HW | Terraced | £482,000 | |
| 10 Jul 2023 | 20 DA15 8HW | Terraced | £470,000 | |
| 22 May 2023 | 80 DA15 8HY | Terraced | £485,000 | |
| 21 Nov 2022 | 133 DA15 8HN | Terraced | £485,000 | |
| 28 Oct 2022 | 50 DA15 8HW | Terraced | £475,000 | |
| 30 Sep 2022 | 24 DA15 8HW | Terraced | £442,000 | |
| 30 Sep 2022 | 144 DA15 8HY | Terraced | £435,000 | |
| 30 May 2022 | 122 DA15 8HY | Terraced | £425,000 | |
| 30 Mar 2022 | 127 DA15 8HN | Terraced | £445,000 | |
| 28 Jan 2022 | 11 DA15 8HW | Terraced | £375,000 | |
| 29 Oct 2021 | 197 DA15 8HX | Terraced | £400,000 | |
| 13 Oct 2021 | 28 DA15 8HW | Terraced | £438,000 | |
| 26 Mar 2021 | 165 DA15 8HX | Terraced | £460,000 | |
| 16 Mar 2021 | 57 DA15 8HW | Terraced | £392,500 | |
| 5 Mar 2021 | 48 DA15 8HW | Terraced | £419,000 | |
| 4 Mar 2021 | 150 DA15 8HY | Terraced | £395,000 | |
| 8 Jan 2021 | 18 DA15 8HW | Terraced | £380,000 | |
| 18 Dec 2020 | 68 DA15 8HY | Terraced | £352,000 | |
| 20 Nov 2020 | 37 DA15 8HW | Terraced | £372,000 | |
| 11 Sep 2020 | 100 DA15 8HY | Terraced | £397,500 | |
| 8 Sep 2020 | 149 DA15 8HN | Flat or maisonette | £410,000 | Leasehold. |
| 10 Jul 2020 | 15 DA15 8HW | Terraced | £365,000 | |
| 29 Jun 2020 | 205 DA15 8HX | Terraced | £387,995 | |
| 25 Jun 2020 | 43 DA15 8HW | Terraced | £380,000 | |
| 17 Jan 2020 | 98 DA15 8HY | Terraced | £400,000 | |
| 27 Sep 2019 | 93 DA15 8HN | Terraced | £424,750 | |
| 20 Sep 2019 | 105 DA15 8HN | Terraced | £408,000 |
Energy performance certificates
90 homes with a current certificate; median floor area 74 m². Most common: House, mid-terrace (53); House, end-terrace (33); House, semi-detached (3). Built: 1930-1949 (79); 1900-1929 (7); 1950-1966 (4). Tenure at assessment: owner-occupied (70); rented (private) (3); rented (social) (1).
Each home's certificates and sales (55 addresses)
- 1, Norfolk Crescent
- 3, Norfolk Crescent
- 15, Norfolk Crescent
- 16, Norfolk Crescent
- 20, Norfolk Crescent
- 24, Norfolk Crescent
- 25, Norfolk Crescent
- 28, Norfolk Crescent
- 36, Norfolk Crescent
- 37, Norfolk Crescent
- 38, Norfolk Crescent
- 41, Norfolk Crescent
- 43, Norfolk Crescent
- 50, Norfolk Crescent
- 51, Norfolk Crescent
- 57, Norfolk Crescent
- 68, Norfolk Crescent
- 71, Norfolk Crescent
- 72, Norfolk Crescent
- 76, Norfolk Crescent
- 81, Norfolk Crescent
- 82, Norfolk Crescent
- 84, Norfolk Crescent
- 87, Norfolk Crescent
- 88, Norfolk Crescent
- 89, Norfolk Crescent
- 91, Norfolk Crescent
- 93, Norfolk Crescent
- 98, Norfolk Crescent
- 101, Norfolk Crescent
- 104, Norfolk Crescent
- 105, Norfolk Crescent
- 112, Norfolk Crescent
- 115, Norfolk Crescent
- 116, Norfolk Crescent
- 126, Norfolk Crescent
- 129, Norfolk Crescent
- 131, Norfolk Crescent
- 134, Norfolk Crescent
- 138, Norfolk Crescent
- 139, Norfolk Crescent
- 141, Norfolk Crescent
- 142, Norfolk Crescent
- 143, Norfolk Crescent
- 148, Norfolk Crescent
- 152, Norfolk Crescent
- 154, Norfolk Crescent
- 158, Norfolk Crescent
- 175, Norfolk Crescent
- 179, Norfolk Crescent
- 205, Norfolk Crescent
- 213, Norfolk Crescent
- 219, Norfolk Crescent
- 223, Norfolk Crescent
- 227, Norfolk Crescent
Council tax
What each band costs in Bexley in 2026-27: Band D £2,366 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,578 | £1,841 | £2,103 | £2,366 | £2,892 | £3,418 | £3,944 | £4,733 |
Homes by band in the neighbourhoods around this street: most are in band D (53% of about 1,350 homes).
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)
- Rear of, 188d Halfway Street, Sidcup, permissioned (360 m)
- 144 Corbylands Road: up to 2 homes, not permissioned (420 m (0.3 miles))
- Rear of 188d Halfway Street, Sidcup: up to 6 homes, not permissioned (440 m (0.3 miles))
- 28 Blackfen Road: up to 4 homes, permissioned (640 m (0.4 miles))
- 70, Blackfen Road, permissioned (790 m (0.5 miles))
- 148 Blackfen Road, Sidcup, permissioned (940 m (0.6 miles))
Roadworks
Finished in the last three months
- 23 September 2026 to 25 September 2026: THAMES WATER, Utility repair and maintenance works, no carriageway incursion, on the footway (immediate - urgent works)
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 5 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 |
|---|---|---|---|
| DA15 8HW | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| DA15 8HY | not in 2 or 3 | 0 / 0 / 1 | unlikely |
| DA15 8HN | not in 2 or 3 | 0 / 0 / 4 | unlikely |
| DA15 8HX | not in 2 or 3 | 0 / 0 / 0 | unlikely |
Height above sea level
The street's 194 addresses are between 32 m and 35 m above sea level (34 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| DA15 8HN | 100% | 100% | 100% | 0% |
| DA15 8HW | 100% | 100% | 100% | 0% |
| DA15 8HX | 100% | 100% | 100% | 0% |
| DA15 8HY | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | New Eltham 2.0 million journeys in 2024–25 | 1.4 km (0.9 miles) |
| Sidcup 2.6 million journeys in 2024–25 | 1.7 km (1 mile) | |
| Falconwood 823,000 journeys in 2024–25 | 1.7 km (1 mile) | |
| Bus stops | 10 stops within 400 m (0.2 miles), 25 within 800 m (0.5 miles); nearest Annandale Road / Days Lane Blackfen | 240 m |
| Bus or coach station | Albany Park - Footscray Lane Sidcup | 2.4 km (1.5 miles) |
| Ferry terminal | Woolwich Arsenal Pier | 5.7 km (3.6 miles) |
| Car parks | Co-op Blackfen Car Park | 1.4 km (0.9 miles) |
| EV charging points | 49 within 1.6 km (1 mile); nearest ubitricity | 90 m |
| Airport with scheduled flights | London City Airport LCY | 7.1 km (4.4 miles) |
| Nearest large airport | London Gatwick Airport LGW | 38 km (24 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 3 practices within 1.6 km (1 mile); nearest Woodlands Surgery | 580 m (0.4 miles) |
| Pharmacies | 7 pharmacies within 1.6 km (1 mile); nearest Targett Chemist | 410 m (0.3 miles) |
| NHS dentists | 8 practices within 1.6 km (1 mile); nearest Sidcup Dental Practice | 540 m (0.3 miles) |
| Hospital | Eltham Community Hospital Cdc | 2.4 km (1.5 miles) |
| Police station | Sidcup Police Station | 1.6 km (1 mile) |
| Cash machines | 2 machines within 800 m (0.5 miles); nearest The Cooperative Food Valliers Wood, Valliers Wood | 380 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 5 within 800 m (0.5 miles); nearest Parish Wood 4.0 ha | 110 m |
| Largest park within 800 m (0.5 miles) | Avery Hill Park 43 ha | 540 m (0.3 miles) |
| Play area | 3 within 800 m (0.5 miles); nearest Unnamed 2,650 m² | 310 m |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 1.4 ha | 700 m (0.4 miles) |
| Allotments | 1 within 800 m (0.5 miles); nearest Days Lane Allotments 4,890 m² | 670 m (0.4 miles) |
Within 800 m (0.5 miles): 5 parks and gardens, 54 hectares in all.
Landmarks
The nearest historic landmark is Conduit Head, Eltham, a scheduled monument, 1.6 km (1 mile) west. 3 listed buildings are within 1 km (0.6 miles).
| Name | What it is | From the middle of the street |
|---|---|---|
| Conduit Head, Eltham | Scheduled monument | 1.6 km (1 mile) west |
| Lamorbey Park | Registered park or garden, Grade II | 1.7 km (1.1 miles) east |
| Danson Park | Registered park or garden, Grade II | 2.3 km (1.5 miles) north-east |
| Maritime Greenwich | World Heritage Site | 7.2 km (4.4 miles) north-west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Parish Wood | Wood | 400 m (0.2 miles) north-east |
| Ashen Grove | Wood | 2.2 km (1.3 miles) south |
| Oxleas Wood | Wood | 2.2 km (1.4 miles) north-west |
| Partridge Shaw | Wood | 2.3 km (1.4 miles) south |
| The Lake | Lake or reservoir | 2.4 km (1.5 miles) north-east |
| Fairy Hill | Hill | 2.4 km (1.5 miles) south-west |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 14.0 | 40 | 10 |
| Fine particles (PM2.5) | 8.5 | 20 | 5 |
| Particles (PM10) | 13.0 | 40 | 15 |
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 and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 55 to 59 | 19 | 0 |
| Under 55 | 175 | 194 |
19 of the street's 194 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 Bexley: see them on the Bexley page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Alderwood Primary School | Primary | 3–11 | 410 m (0.3 miles) | Report card (Dec 2025): Curriculum and teaching: Expected standard; Achievement: Strong standard; Attendance and behaviour: Expected standard; Personal development and wellbeing: Strong standard; Inclusion: Strong standard; Leadership and governance: Strong standard; Early years: Expected standard; Safeguarding standards: Met |
| Our Lady of the Rosary Catholic Primary School Roman Catholic | Primary | 3–11 | 440 m (0.3 miles) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Outstanding; Personal development: Good; Leadership and management: Good |
| Days Lane Primary School | Primary | 3–11 | 820 m (0.5 miles) | Good (Mar 2023, overall grade under the previous framework) |
| Dulverton Primary School | Primary | 3–11 | 1 km (0.7 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 |
| Leigh Stationers' Academy | Secondary | 11–18 | 1.1 km (0.7 miles) | Good (Jan 2023, overall grade under the previous framework) |
| Burnt Oak Junior School | Primary | 7–11 | 1.2 km (0.8 miles) | No published inspection |
| Wyborne Primary School | Primary | 3–11 | 1.3 km (0.8 miles) | No published inspection |
| Chatsworth Infant School | Primary | 3–7 | 1.4 km (0.8 miles) | Good (Sep 2019, overall grade under the previous framework) |
| Holy Trinity Lamorbey Church of England School | Primary | 3–11 | 1.4 km (0.9 miles) | Good (Oct 2023, overall grade under the previous framework) |
| Harris Academy Falconwood | Secondary | 11–18 | 1.4 km (0.9 miles) | Good (Oct 2019, overall grade under the previous framework) |
| Longlands Primary School | Primary | 5–11 | 1.5 km (1 mile) | No published inspection |
| Bishop Ridley Church of England Primary School | Primary | 3–11 | 1.6 km (1 mile) | No published inspection |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Black Boy Public House DA15 8EA | Pub/bar/nightclub | 170 m | 5 Very good | 20 Jun 2024 |
| Bexley Foodbank DA15 8EA | Retailers - other | 170 m | 5 Very good | 27 Jul 2024 |
| Holy Redeemer Pre-school DA15 8JR | Hospitals/Childcare/Caring Premises | 230 m | 5 Very good | 23 Sep 2025 |
| The Halfway House DA15 8DJ | Pub/bar/nightclub | 410 m (0.3 miles) | 4 Good | 18 Jun 2024 |
| Mia's Of Sidcup DA15 8DJ | Retailers - other | 410 m (0.3 miles) | 4 Good | 22 Sep 2025 |
| The Co-Operative DA15 8DJ | Retailers - supermarkets/hypermarkets | 410 m (0.3 miles) | 5 Very good | 4 Oct 2022 |
| Targett Chemist DA15 8DJ | Retailers - other | 410 m (0.3 miles) | Exempt | |
| Sidcup Fish Bar DA15 8DJ | Takeaway/sandwich shop | 410 m (0.3 miles) | 5 Very good | 9 Mar 2026 |
| Peri Peri Royal Wings DA15 8DJ | Takeaway/sandwich shop | 410 m (0.3 miles) | 3 Generally satisfactory | 17 Sep 2025 |
| Kra Convenience Store DA15 8DJ | Retailers - other | 410 m (0.3 miles) | 5 Very good | 11 Mar 2024 |
| Maharani DA15 8DJ | Restaurant/Cafe/Canteen | 410 m (0.3 miles) | 5 Very good | 19 Nov 2025 |
| Walnuts DA15 8DJ | Restaurant/Cafe/Canteen | 410 m (0.3 miles) | 5 Very good | 22 Dec 2025 |
| Halfway Cafe DA15 8DJ | Restaurant/Cafe/Canteen | 410 m (0.3 miles) | 4 Good | 30 Jun 2026 |
| Eltham Green School Nursery Ltd SE9 2LR | Hospitals/Childcare/Caring Premises | 440 m (0.3 miles) | 5 Very good | 4 Jun 2025 |
| Morrisons Daily DA15 8DL | Retailers - other | 470 m (0.3 miles) | 5 Very good | 5 Jan 2026 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 22 |
| Anti-social behaviour | 15 |
| Vehicle crime | 9 |
| Other theft | 7 |
| Other crime | 3 |
| Burglary | 3 |
| Theft from the person | 2 |
| Criminal damage and arson | 2 |
| Bicycle theft | 1 |
| Drugs | 1 |
Most of these are attached to: On or near Restons Crescent (16); On or near Alderwood Road (14); On or near Southspring (9); On or near Radfield Way (7); On or near Norfolk Crescent (6).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 40 | 40 |
| Children under 15 | 19% | 17% |
| Aged 65 and over | 15% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 93% | 61% |
| Owned outright | 39% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | under 1% | 17% |
| Private rented | 6% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 67% | 57% |
| Unemployment (of those working or looking for work) | 4% | 6% |
| Retired (of adults) | 17% | 22% |
| Long-term sick or disabled (of adults) | 3% | 4% |
| Work mainly from home (of those in work) | 39% | 32% |
| Travel to work by car or van | 44% | 48% |
| By train, Underground, metro or tram | 9% | 4% |
| By any public transport, including bus | 11% | 8% |
| On foot or by bicycle | 4% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 66% | 65% |
| Work 30 km (19 miles) or more away | 4% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 25% | 34% |
| No qualifications | 14% | 18% |
| Apprenticeship as highest qualification | 7% | 5% |
| Main language English (aged 3 and over) | 96% | 91% |
| Cannot speak English well or at all | 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
- DA15 8HW: 66 addresses of 67 in the postcode
- DA15 8HY: 56 addresses
- DA15 8HN: 40 addresses of 41 in the postcode
- DA15 8HX: 32 addresses
Nearby streets
Greenhithe Close · Greenhithe Close · Radfield Way · Hambledown Road · Holden Mews · Southspring · Rosebery Avenue · Arlington Close · Perpins Road · Alderwood Road · Taman Mews · Anstridge Road
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.