Back Grove Road Ilkley, Bradford
16 addresses across 5 postcodes (LS29), about 320 m long, classed as a local road. USRN 7705310.
- Prices and rents: A typical home in Bradford cost £185,297 in August 2026 (+2.1% on a year); private rents averaged £739 a month.
- Energy: 2 homes have an energy certificate (C: 1, D: 1).
- Flood: 5 addresses on its postcodes are 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.
- Storm overflows: 3 storm overflows within 1 km (0.6 miles) spilled 44 times (263 hours) in 2025.
- Radon: Up to 1 to 3% 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 C; Band D in Bradford costs £2,361 a year in 2026-27.
- Broadband: Gigabit broadband is available to 83% to 100% of premises.
- Transport: The nearest railway station is Ilkley, about 360 m away in a straight line.
- Green space: The nearest park or garden, Spence's Garden, is about 50 m away.
- Air: Background air pollution in 2024 was 6.6 µg/m³ of nitrogen dioxide and 6.0 of PM2.5, within UK legal limits.
- Height: Its addresses are 88 to 91 m above sea level.
- Noise: 12 of its 16 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is I G Medical, about 770 m (0.5 miles) away, with 2 practices within 1.6 km (1 mile).
- People: About 500 people lived in the census areas around it in 2021; 59% of households owned their home and 45% of adults held a degree or other higher qualification.
- Crime: 80 crimes were recorded within 250 m between September 2025 and August 2026, most often shoplifting.
- Road safety: 11 collisions in which someone was hurt were reported on and around it in 2021 to 2025, 3 of them fatal or serious; 5 involved a pedestrian.
£9.99 The Street Dossier Full Report for a home on Back Grove Road: its own records, questions to ask the seller and everything on this page, in one PDF. Choose the home
House sales on this street
No sales recorded on this street since January 1995 under this street name.
House prices and rents in Bradford
A typical home in Bradford cost £185,297 in August 2026, 2.1% more than a year before. That is 25% more than five years earlier and 48% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £330,266 |
| Semi-detached | £206,237 |
| Terraced | £156,116 |
| Flat or maisonette | £110,042 |
| Bought by a first-time buyer | £166,791 |
Private renters in Bradford paid £739 a month on average in September 2026, 1.6% more than a year before. That is 27% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £545 |
| Two bedrooms | £670 |
| Three bedrooms | £803 |
| Four or more bedrooms | £1,099 |
Energy performance certificates
2 homes with a current certificate; median floor area 114 m². Most common: Flat (1); Maisonette, mid-terrace (1). Built: 2016 (1); 1900-1929 (1). Tenure at assessment: owner-occupied (1); rented (private) (1).
Each home's certificates and sales (2 addresses)
Gas and electricity use
Homes with gas used 15,654 kWh of it on average in 2024, about the same as the district, and 1,486 kWh of electricity, 62% less than the district's 3,893 kWh. There are gas meters for about 21% 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 LS29.
Council tax
What each band costs in Bradford in 2026-27: Band D £2,361 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,574 | £1,836 | £2,098 | £2,361 | £2,885 | £3,410 | £3,935 | £4,721 |
Homes by band in the neighbourhood around this street: most are in band C (29% of about 970 homes).
Planning and heritage
- Conservation area: yes, Ilkley (council page). Extensions, demolition, some windows and doors, and work on trees need consent.
- Listed buildings on or by this street: 2.
- 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.
Listed buildings
- Gate piers, gates, railings and steps, Ilkley Memorial Gardens, grade II
- UNITED REFORMED CHURCH, grade II
Brownfield land registered for housing within 1 km (0.6 miles)
- Railway Road. Mayfield Road, Ilkley, permissioned (780 m (0.5 miles))
- Dove Corner, Hollingwood Gate, Ilkley, permissioned (930 m (0.6 miles))
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, 2 addresses are in areas at high risk, 3 at medium risk and 9 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 56 homes the Environment Agency counts, 1 are in areas at high risk, 0 medium, 3 low and 0 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 on this street is in flood zone 2 or 3.
| Postcode | Planning zone | Addresses at high / medium / low risk | Groundwater |
|---|---|---|---|
| LS29 9EE | not in 2 or 3 | 0 / 0 / 7 | unlikely |
| LS29 8AF | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| LS29 9FB | not in 2 or 3 | 0 / 0 / 0 | unlikely |
| LS29 9DZ | not in 2 or 3 | 2 / 3 / 2 | unlikely |
| LS29 9EG | 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
3 storm overflows within 1 km (0.6 miles) of the street's postcodes spilled 44 times, for 263 hours in all, in 2025. They discharge into River Wharfe, Spicey Gill.
| Overflow | Into | Spills | Hours | Distance |
|---|---|---|---|---|
| Rivadale View Cso Yorkshire Water | River Wharfe | 20 | 48 | 340 m |
| Bridge Lane Sewage Pumping Station Yorkshire Water | Spicey Gill | 0 | 0 | 380 m |
| Middleton (Ilkley) Pumping Station Yorkshire Water | River Wharfe | 24 | 215 | 1 km (0.6 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 1 to 3%: 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. 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 16 addresses are between 88 m and 91 m above sea level (90 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| LS29 8AF | 100% | 100% | 83% | 0% |
| LS29 9DZ | 100% | 100% | 100% | 0% |
| LS29 9EE | 100% | 94% | 90% | 0% |
| LS29 9EG | 100% | 100% | 100% | 0% |
| LS29 9FB | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Ilkley 1.4 million journeys in 2024–25 | 360 m |
| Ben Rhydding 219,000 journeys in 2024–25 | 2 km (1.2 miles) | |
| Burley-In-Wharfedale 607,000 journeys in 2024–25 | 5.2 km (3.2 miles) | |
| Bus stops | 17 stops within 400 m (0.2 miles), 45 within 800 m (0.5 miles); nearest Grove Road Ilkley | 80 m |
| Bus or coach station | Ilkley Bus Station | 390 m |
| EV charging points | 2 within 1.6 km (1 mile); nearest Hawksworth Street Car Park GeniePoint | 200 m |
| Airport with scheduled flights | Leeds Bradford Airport LBA | 12.8 km (7.9 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 2 practices within 1.6 km (1 mile); nearest I G Medical Good Jun 2016 | 770 m (0.5 miles) |
| Pharmacies | 2 pharmacies within 1.6 km (1 mile); nearest Boots | 270 m |
| NHS dentists | 5 practices within 1.6 km (1 mile); nearest Acorn Villas Dental Practice | 20 m |
| Hospital | Grove Convalescent Hospital | 260 m |
| Care homes | 7 homes within 1.6 km (1 mile); nearest Abbeyfield - Grove House Residential Good Dec 2023 | 250 m |
| Police station | West Yorkshire Police - Ilkley Police Station | 220 m |
| Cash machines | 3 machines within 800 m (0.5 miles); nearest The Cooperative Food Ilkley Bolton Bridge Road | 130 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 7 within 800 m (0.5 miles); nearest Spence's Garden 7,050 m² | 50 m |
| Largest park within 800 m (0.5 miles) | Riverside Gardens 3.7 ha | 270 m |
| Play area | 3 within 800 m (0.5 miles); nearest Unnamed 2,440 m² | 360 m |
| Playing field | 3 within 800 m (0.5 miles); nearest Unnamed 2.6 ha | 400 m (0.2 miles) |
| Allotments | 2 within 800 m (0.5 miles); nearest Bridge Lane Allotment Gardens 2,790 m² | 230 m |
Within 800 m (0.5 miles): 7 parks and gardens, 9.4 hectares in all.
Landmarks
The nearest historic landmark is Ilkley Memorial Gardens, a registered park or garden (Grade II), 100 m west. 48 listed buildings are within 1 km (0.6 miles), 3 of them Grade I and 3 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| Ilkley Memorial Gardens | Registered park or garden, Grade II | 100 m west |
| 3 Stone Crosses South of the Church of All Saints | Listed building, Grade I | 270 m north-east |
| Parish Church of All Saints | Listed building, Grade II* | 280 m north-east |
| Manor House | Listed building, Grade I | 280 m north-east |
| Site of Roman Fort, Ilkley. | Scheduled monument | 300 m north-east |
| Three carved rocks opposite St Margaret's Church | Scheduled monument | 370 m south |
| Church of St Margaret | Listed building, Grade II* | 410 m (0.3 miles) south |
| Old Bridge | Scheduled monument | 500 m (0.3 miles) north-west |
| Heathcote, Ilkley | Registered park or garden, Grade II | 580 m (0.4 miles) west |
| Saltaire | World Heritage Site | 9.9 km (6.2 miles) south |
| Name | What it is | From the middle of the street |
|---|---|---|
| Castle Hill | Hill | 480 m (0.3 miles) north-east |
| Limybank Deeps | Lake or reservoir | 580 m (0.4 miles) north-west |
| Ilkley Beach | Beach | 1 km (0.6 miles) north-east |
| Stubham Wood | Wood | 1.2 km (0.7 miles) north-east |
| Springs Bottom | Valley | 1.3 km (0.8 miles) north-west |
| Ellishaw Slack | Wetland | 3.1 km (1.9 miles) north |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 6.6 | 40 | 10 |
| Fine particles (PM2.5) | 6.0 | 20 | 5 |
| Particles (PM10) | 8.8 | 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 |
|---|---|---|
| 65 to 69 | 1 | 0 |
| 60 to 64 | 8 | 0 |
| 55 to 59 | 3 | 0 |
| Under 55 | 4 | 16 |
12 of the street's 16 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 Bradford: see them on the Bradford page.
Nearest schools
| School | Phase | Ages | Distance | Inspection | Exam results |
|---|---|---|---|---|---|
| All Saints' CofE Primary School Church of England | Primary | 4–11 | 410 m (0.3 miles) | Good (Dec 2023, overall grade under the previous framework) | 82% at the expected standard in reading, writing and maths, 15% at the higher standard (2025; 91% in 2024 and 87% in 2023) |
| Ilkley Grammar School | Secondary | 11–18 | 1 km (0.6 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 | GCSE 2026 (provisional): Attainment 8 56.6 (56.5 in 2025 and 56.5 in 2024); 58.3% grade 5+ in English and maths A level 2025: average grade B-; 24% AAB or better; progress above average |
| Ashlands Primary School | Primary | 3–11 | 1 km (0.6 miles) | No overall grade (May 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good | 66% at the expected standard in reading, writing and maths, 5% at the higher standard (2025; 63% in 2024 and 63% in 2023) |
| The Sacred Heart Catholic Primary School Roman Catholic | Primary | 5–11 | 1.2 km (0.7 miles) | Good (Jul 2022, overall grade under the previous framework) | 58% at the expected standard in reading, writing and maths, 11% at the higher standard (2025; 78% in 2024 and 63% in 2023) |
| Ben Rhydding Primary School | Primary | 4–11 | 1.7 km (1 mile) | No published inspection | None published |
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
4 nurseries, pre-schools and clubs within 1.5 km (0.9 miles), the nearest 180 m from the middle of the street.
| Provider | Kind | Places | Latest inspection | Distance |
|---|---|---|---|---|
| Riverside (Spicey Gill) Private Day Care LS29 9AD | Full day care | 48 | Good (Jul 2022, overall grade under the previous framework) | 180 m |
| Kip McGrath Ilkley LS29 8AA | Out-of-school day care (over fives) | Not inspected yet | 240 m | |
| All Saints Pre-School LS29 8HZ | Sessional day care | 23 | Outstanding (Mar 2022, overall grade under the previous framework) | 730 m (0.5 miles) |
| The Larks And Nightingales LS29 8NL | Out-of-school day care | 20 | Not inspected yet | 1.4 km (0.8 miles) |
Ofsted also registers 215 childminders and 16 home childcarers (nannies) in Bradford. 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 |
|---|---|---|---|---|
| The Ilkley Tap (Bar Only) LS29 9PA | Pub/bar/nightclub | 20 m | 5 Very good | 7 Nov 2024 |
| Stuzzi LS29 9PA | Restaurant/Cafe/Canteen | 20 m | 5 Very good | 7 Nov 2024 |
| J Reserve LS29 9PA | Restaurant/Cafe/Canteen | 30 m | 5 Very good | 27 May 2026 |
| Ilkley Green Room LS29 9PA | Restaurant/Cafe/Canteen | 30 m | 4 Good | 29 Jan 2025 |
| Martinez Wines LS29 9NJ | Retailers - other | 60 m | 5 Very good | 8 Feb 2024 |
| Thirty Nine Cafe LS29 9NJ | Restaurant/Cafe/Canteen | 60 m | 5 Very good | 8 Feb 2024 |
| Bar Tat LS29 9DZ | Pub/bar/nightclub | 120 m | 5 Very good | 12 May 2025 |
| Clarke Foley Centre LS29 9DZ | Other catering premises | 120 m | 5 Very good | 23 Sep 2025 |
| Masonic Lodge LS29 9DZ | Pub/bar/nightclub | 120 m | 5 Very good | 13 Sep 2017 |
| TG Jones High Street LS29 9EE | Retailers - other | 120 m | Exempt | |
| Bettys Cafe Tea Room LS29 9EE | Restaurant/Cafe/Canteen | 120 m | 5 Very good | 28 Nov 2024 |
| Oxfam LS29 9EE | Retailers - other | 120 m | Exempt | |
| Ilkley Bowling Club - Bar Only LS29 9EW | Pub/bar/nightclub | 130 m | 5 Very good | 10 Dec 2019 |
| Brooks LS29 9LB | Restaurant/Cafe/Canteen | 130 m | 5 Very good | 16 May 2025 |
| Clayful LS29 9LB | Retailers - other | 130 m | 4 Good | 17 Dec 2024 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Shoplifting | 19 |
| Violence and sexual offences | 18 |
| Criminal damage and arson | 8 |
| Other theft | 8 |
| Anti-social behaviour | 6 |
| Burglary | 6 |
| Public order | 6 |
| Vehicle crime | 3 |
| Other crime | 2 |
| Theft from the person | 2 |
| Robbery | 1 |
| Drugs | 1 |
Most of these are attached to: On or near Supermarket (13); On or near Back Grove Road (13); On or near Cunliffe Road (12); On or near Back Cunliffe Road (8); On or near Back Middleton Road (6).
Road safety
11 collisions in which someone was hurt were reported on and around the street in 2021 to 2025: 0 fatal, 3 serious and 8 slight, in which 3 people were seriously hurt. 5 involved a pedestrian; 1 involved a child under 16. 9% happened in the dark, and 45% on a wet or icy road. Most were on roads with a 30 mph limit.
| Year | Collisions | Fatal or serious |
|---|---|---|
| 2021 | 2 | 1 |
| 2022 | 2 | 1 |
| 2023 | 3 | 1 |
| 2024 | 1 | 0 |
| 2025 | 3 | 0 |
| Date | Severity | Who was hurt | Road | Conditions |
|---|---|---|---|---|
| 31 Dec 2025 21:22 | Slight | 1 person: 1 pedestrian | Minor road, 20 mph | Dark, street lights on, wet road |
| 14 Dec 2025 14:31 | Slight | 2 people: 2 pedestrians | Minor road, 20 mph | Wet road |
| 13 Jan 2025 09:00 | Slight | 1 person: 1 pedestrian | A65, 30 mph | Wet road |
| 9 Feb 2024 14:10 | Slight | 1 person | Minor road, 30 mph | Daylight |
| 18 Dec 2023 16:02 | Serious | 1 person: 1 pedestrian | B6382, 20 mph | Daylight |
| 24 Oct 2023 15:05 | Slight | 1 person | Minor road, 30 mph | Wet road |
| 9 Aug 2023 17:25 | Slight | 1 person | Minor road, 30 mph | Daylight |
| 21 Oct 2022 15:55 | Slight | 2 people | B6382, 30 mph | Wet road |
| 26 Jan 2022 14:45 | Serious | 1 person | Minor road, 30 mph | Daylight |
| 17 Jun 2021 15:20 | Serious | 1 person | B6382, 30 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 | 60 | 40 |
| Children under 15 | 7% | 17% |
| Aged 65 and over | 45% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 59% | 61% |
| Owned outright | 46% | 33% |
| Shared ownership | 0% | 1% |
| Social rented | 11% | 17% |
| Private rented | 31% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 42% | 57% |
| Unemployment (of those working or looking for work) | 5% | 6% |
| Retired (of adults) | 46% | 22% |
| Long-term sick or disabled (of adults) | 2% | 4% |
| Work mainly from home (of those in work) | 35% | 32% |
| Travel to work by car or van | 38% | 48% |
| By train, Underground, metro or tram | 3% | 4% |
| By any public transport, including bus | 4% | 8% |
| On foot or by bicycle | 23% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 49% | 65% |
| Work 30 km (19 miles) or more away | 8% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 45% | 34% |
| No qualifications | 16% | 18% |
| Apprenticeship as highest qualification | 5% | 5% |
| Main language English (aged 3 and over) | 95% | 91% |
| Cannot speak English well or at all | under 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.
What has changed
- Food hygiene ratings Savers (retailers - other, LS29 8DE) is no longer listed; it was rated 5 Very good found 5 November 2026
Postcodes on this street
- LS29 9EE: 10 addresses of 62 in the postcode
- LS29 8AF: 2 addresses of 29 in the postcode
- LS29 9FB: 2 addresses of 4 in the postcode
- LS29 9DZ: 1 address of 71 in the postcode
- LS29 9EG: 1 address of 27 in the postcode
Nearby streets
Regent Road · The Grove · Bolton Bridge Road · Cunliffe Road · Skipton Road · Chapel Lane · Back Parish Ghyll Road · St James' Road · Yewbank Terrace · Holme View · Lister Street · Hawksworth Street
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.