High Terrace Caergybi / Holyhead, Isle of Anglesey
20 addresses across 1 postcode (LL65), about 120 m long, classed as a local road. USRN 18301412.
- Sales: 17 recorded sales since 1995; in 2025 the median was £130,000 across 1 sale.
- Prices and rents: A typical home in Isle of Anglesey cost £236,308 in August 2026 (-0.4% on a year); private rents averaged £717 a month.
- Energy: 15 homes have an energy certificate (D: 6, E: 7, G: 2).
- Flood: No postcode centre on the street is in flood zone 2 or 3.
- Recorded floods: No recorded flood covers the centre of any of its postcodes.
- Coastal erosion: The nearest projected coastal erosion zone is 900 m (0.6 miles) from its postcodes.
- 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.
- Traffic: The busiest counted road within 500 m (0.3 miles), the A55, carries 15,918 motor vehicles a day on average (2025).
- Council tax: Most homes around it are in council tax band A; Band D in Isle of Anglesey costs £2,261 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Holyhead, about 380 m away in a straight line.
- Green space: The nearest park or garden is about 580 m (0.4 miles) away.
- Air: Background air pollution in 2024 was 3.4 µg/m³ of nitrogen dioxide and 4.4 of PM2.5, within UK legal limits.
- Height: Its addresses are 23 to 28 m above sea level.
- Noise: 16 of its 20 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is Hwb Iechyd Cybi, about 270 m away, with 3 practices within 1.6 km (1 mile).
- People: About 280 people lived in the census areas around it in 2021; 44% of households owned their home and 17% of adults held a degree or other higher qualification.
- Crime: 116 crimes were recorded within 250 m between September 2025 and August 2026, most often violence and sexual offences.
- Road safety: 1 collision in which someone was hurt was reported on and around it in 2021 to 2025.
£9.99 The Street Dossier Full Report for a home on High 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 |
|---|---|---|---|---|
| 2025 | 1 | £130,000 | £130,000 | £130,000 |
| 2023 | 2 | £230,000 | £195,000 | £265,000 |
| 2021 | 1 | £140,000 | £140,000 | £140,000 |
| 2019 | 2 | £74,000 | £68,000 | £80,000 |
| 2018 | 1 | £137,500 | £137,500 | £137,500 |
| 2015 | 2 | £100,000 | £88,000 | £112,000 |
| 2007 | 1 | £90,000 | £90,000 | £90,000 |
| 2006 | 1 | £130,000 | £130,000 | £130,000 |
| 2005 | 1 | £90,000 | £90,000 | £90,000 |
| 2003 | 2 | £55,500 | £53,000 | £58,000 |
| 2002 | 1 | £50,000 | £50,000 | £50,000 |
| 2000 | 1 | £35,000 | £35,000 | £35,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 23 Jan 2023 | 3 LL65 1SP | Terraced | £195,000 | |
| 16 Nov 2018 | 3 LL65 1SP | Terraced | £137,500 | |
| 23 Jun 2006 | 3 LL65 1SP | Terraced | £130,000 | |
| 4 Sep 2002 | 3 LL65 1SP | Terraced | £50,000 | |
| 19 Sep 2003 | 4 LL65 1SP | Terraced | £58,000 | |
| 28 Jul 2000 | 5 LL65 1SP | Terraced | £35,000 | |
| 13 Oct 2015 | 6 LL65 1SP | Terraced | £88,000 | |
| 5 Sep 2019 | 8 LL65 1SP | Terraced | £68,000 | |
| 14 Feb 2003 | 9 LL65 1SP | Terraced | £53,000 | |
| 24 Apr 2007 | 10 LL65 1SP | Terraced | £90,000 | |
| 20 Aug 2025 | 12 LL65 1SP | Terraced | £130,000 | |
| 20 Oct 1999 | 13 LL65 1SP | Terraced | £41,500 | |
| 8 Jul 2021 | 15 LL65 1SP | Terraced | £140,000 | |
| 6 Dec 2019 | 15 LL65 1SP | Terraced | £80,000 | |
| 13 Nov 2015 | 16 LL65 1SP | Terraced | £112,000 | |
| 4 Mar 2005 | 16 LL65 1SP | Terraced | £90,000 | |
| 3 Aug 2023 | GWYNFA VILLA LL65 1SP | Detached | £265,000 |
House prices and rents in Isle of Anglesey
A typical home in Isle of Anglesey cost £236,308 in August 2026, 0.4% less than a year before. That is 14% more than five years earlier and 56% more than ten years earlier.
| Home | Typical price, Aug 2026 |
|---|---|
| Detached | £324,232 |
| Semi-detached | £208,964 |
| Terraced | £165,712 |
| Flat or maisonette | £140,634 |
| Bought by a first-time buyer | £194,158 |
Private renters in Isle of Anglesey paid £717 a month on average in September 2026, 5.9% more than a year before. That is 32% more than five years earlier.
| Home | Average rent a month, Sep 2026 |
|---|---|
| One bedroom | £553 |
| Two bedrooms | £697 |
| Three bedrooms | £802 |
| Four or more bedrooms | £1,089 |
Energy performance certificates
15 homes with a current certificate; median floor area 106 m². Most common: House, mid-terrace (11); House, end-terrace (2); Bungalow, detached (1). Built: before 1900 (11); 1900-1929 (3); 1950-1966 (1). Tenure at assessment: owner-occupied (10); rented (private) (4).
Each home's certificates and sales (15 addresses)
Gas and electricity use
Homes with gas used 11,516 kWh of it on average in 2024, 28% more than the district's 9,022 kWh, and 2,999 kWh of electricity, 11% less than the district's 3,378 kWh. There are gas meters for about 100% of the homes.
These are all the homes on the 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 LL65.
Council tax
What each band costs in Isle of Anglesey in 2026-27: Band D £2,261 a year on average, including the police and community council charges.
| A | B | C | D | E | F | G | H | I |
|---|---|---|---|---|---|---|---|---|
| £1,507 | £1,758 | £2,010 | £2,261 | £2,763 | £3,265 | £3,768 | £4,521 | £5,275 |
Homes by band in the neighbourhood around this street: most are in band A (54% of about 710 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 directions, tree preservation orders and green belt: Wales has no national record of these; the council's planning department holds them.
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
Street works permits come from the Department for Transport's Street Manager, which covers England only.
Flood risk
Rivers, the sea or surface water: of the 21 address points in this street's postcodes, 0 at high risk, 5 at medium risk and 2 at low risk. Each counts once, at the higher of its rivers-and-sea and surface-water risk.
Rivers and the sea alone: none is in an area at risk. Surface water and small watercourses alone: 0 at high risk, 5 at medium risk and 2 at low risk.
High: 3.3% (1 in 30) or more chance of flooding a year. Medium: 1% to 3.3%. Low: 0.1% to 1%. The map allows for flood defences. Address points are every property record (UPRN) in the postcode, each counted if it is in an area or within 5 m of one (the maps stop at building walls); a few are not homes, such as garages, business units or caravan pitches. Counts cover whole postcodes, which can include other streets.
Flood zone for planning: no postcode centre is in flood zone 2 or 3. Welsh zones include an allowance for climate change.
Recorded floods
No recorded flood covers the centre 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
The nearest projected erosion zone is 900 m (0.6 miles) from the street's postcodes (by 2105, if defences are not maintained or built).
| Projection | Policy for the frontage | Erosion | Distance |
|---|---|---|---|
| By 2105, if defences are not maintained or built | No intervention SMP21 (St Ann's Head to Great Orme Head) | up to 3.4 - 6.6 m | 900 m (0.6 miles) |
Each shoreline management plan sets a policy for each stretch of coast: hold the line (keep defences where they are), managed realignment (let the shore move back in a controlled way), advance the line, or no active intervention. Erosion is the distance the shore may move back, counted from today, for the higher central climate change allowance. The maps are guidance from national modelling, not a survey of any one home; the council's coastal team can say more.
Storm overflows
No storm overflow outlet is within 1 km (0.6 miles) of the street's postcodes in this record, which covers the overflows reported to the Environment Agency: most of Wales's are reported to Natural Resources Wales instead.
Coal mining
No postcode centre here is in a coalfield: the Mining Remediation Authority records no coal mining risk here.
Radon
The postcode is in a 1 km square with radon potential up to 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 the square 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 20 addresses are between 23 m and 28 m above sea level (26 m on average); the ground rises about 6 m from the lowest to the highest.
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| LL65 1SP | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Holyhead 237,000 journeys in 2024–25 | 380 m |
| Valley 22,000 journeys in 2024–25 | 5.7 km (3.5 miles) | |
| Rhosneigr 14,000 journeys in 2024–25 | 11.9 km (7.4 miles) | |
| Bus stops | 6 stops within 400 m (0.2 miles), 24 within 800 m (0.5 miles); nearest Chester Inn Stryd | 200 m |
| Ferry terminal | Holyhead Ferry Terminal | 560 m (0.3 miles) |
| EV charging points | 3 within 1.6 km (1 mile); nearest Gridserve Charging Station | 620 m (0.4 miles) |
| Airport with scheduled flights | Liverpool John Lennon Airport LPL | 119 km (74 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 3 practices within 1.6 km (1 mile); nearest Hwb Iechyd Cybi | 270 m |
| Pharmacies | 3 pharmacies within 1.6 km (1 mile); nearest Boots | 370 m |
| NHS dentists | 2 practices within 1.6 km (1 mile); nearest Longford Road Dental | 150 m |
| Hospital | Ysbyty Penrhos Stanley | 1.4 km (0.9 miles) |
| Police station | Holyhead Police Station | 660 m (0.4 miles) |
| Cash machines | 2 machines within 800 m (0.5 miles); nearest The Cooperative Food Holyhead, Holyhead Cashzone | 440 m (0.3 miles) |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 1 within 800 m (0.5 miles); nearest Unnamed 4.3 ha | 580 m (0.4 miles) |
| Play area | 4 within 800 m (0.5 miles); nearest Unnamed 420 m² | 630 m (0.4 miles) |
| Playing field | Unnamed 2.2 ha | 800 m (0.5 miles) |
| Allotments | 1 within 800 m (0.5 miles); nearest Unnamed 1.8 ha | 330 m |
Within 800 m (0.5 miles): 1 park or garden, 4.3 hectares in all.
Landmarks
The nearest historic landmark is Walls of upper churchyard, a listed building (Grade I), 520 m (0.3 miles) north-east. 37 listed buildings are within 1 km (0.6 miles), 2 of them Grade I.
| Name | What it is | From the middle of the street |
|---|---|---|
| Walls of upper churchyard | Listed building, Grade I | 520 m (0.3 miles) north-east |
| St Cybi's Church | Listed building, Grade I | 530 m (0.3 miles) north-east |
| Roman Wall Surrounding St Cybi's Churchyard | Scheduled monument | 540 m (0.3 miles) north-east |
| Tŷ Mawr Standing Stone | Scheduled monument | 1.6 km (1 mile) south-east |
| Plas Meilw Hut Circles | Scheduled monument | 1.9 km (1.2 miles) south-west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Porth y Sach | Tidal water | 1.1 km (0.7 miles) north-east |
| Newry Beach | Beach | 1.2 km (0.7 miles) north |
| Valley of the Rocks | Valley | 1.7 km (1.1 miles) south |
| Pwll Clai | Lake or reservoir | 2 km (1.3 miles) north-west |
| Holyhead Mountain | Hill | 2.7 km (1.7 miles) west |
| Parc Glannau Penrhos | Wood | 3.1 km (1.9 miles) east |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 3.4 | 40 | 10 |
| Fine particles (PM2.5) | 4.4 | 20 | 5 |
| Particles (PM10) | 7.7 | 40 | 15 |
All three are within both the UK limits and the WHO guidelines.
Road and rail noise
| Level | Road traffic | Railways |
|---|---|---|
| 55 to 59 | 16 | 0 |
| Under 55 | 4 | 20 |
16 of the street's 20 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 Isle of Anglesey: see them on the Isle of Anglesey page.
Nearest schools
| School | Phase | Ages | Distance | Inspection | Exam results |
|---|---|---|---|---|---|
| Ysgol Santes Fair Roman Catholic Welsh medium | Primary | 3–11 | 150 m | Estyn reports · My Local School | Not published in Wales |
| Ysgol Uwchradd Caergybi Welsh medium | Secondary | 11–19 | 480 m (0.3 miles) | Estyn reports · My Local School | Not published in Wales |
| Cybi Church in Wales Welsh medium | Primary | 3–11 | 520 m (0.3 miles) | Estyn reports · My Local School | Not published in Wales |
| Ysgol Llanfawr Welsh medium | Primary | 3–11 | 900 m (0.6 miles) | Estyn reports · My Local School | Not published in Wales |
| Ysgol Gynradd Kingsland Welsh medium | Primary | 3–11 | 1.1 km (0.7 miles) | Estyn reports · My Local School | Not published in Wales |
| Ysgol Gymraeg Morswyn Welsh medium | Primary | 3–11 | 1.1 km (0.7 miles) | Estyn reports · My Local School | Not published in Wales |
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. Wales publishes no school results tables.
Nurseries and childcare
Ofsted registers childcare in England only. In Wales, nurseries, playgroups and childminders are registered and inspected by Care Inspectorate Wales, whose directory of services lists them with their reports.
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Licence To Grill LL65 1TD | Mobile caterer | 120 m | 5 Very good | 18 Sep 2026 |
| Licence 2 Chill LL65 1TD | Mobile caterer | 120 m | 5 Very good | 25 Apr 2025 |
| Licence to Grill Mobile LL65 1TD | Mobile caterer | 120 m | 5 Very good | 18 Sep 2026 |
| Millbank Stores LL65 1TE | Retailers - other | 170 m | 5 Very good | 11 Nov 2024 |
| The Chester LL65 1TE | Pub/bar/nightclub | 170 m | 5 Very good | 5 Aug 2022 |
| Bake Me Happy Cakeaway LL65 1SJ | Other catering premises | 190 m | 5 Very good | 28 May 2025 |
| Midshire Catering LL65 1RJ | Restaurant/Cafe/Canteen | 210 m | 5 Very good | 22 Sep 2025 |
| Ysgol Santes Fair LL65 1TR | School/college/university | 210 m | 5 Very good | 23 Jun 2025 |
| Newry @ Santes Fair LL65 1TR | Hospitals/Childcare/Caring Premises | 210 m | 5 Very good | 7 Jan 2025 |
| Bakes by Nikki LL65 2AA | Other catering premises | 260 m | 5 Very good | 24 Nov 2025 |
| Holland Hotel LL65 2HW | Pub/bar/nightclub | 270 m | 5 Very good | 5 Jul 2022 |
| Bargain Box/Y Bocs Bargen LL65 1UW | Retailers - other | 290 m | 5 Very good | 3 Aug 2023 |
| Nuha Tandoori LL65 1UW | Restaurant/Cafe/Canteen | 290 m | 2 Improvement necessary | 25 Feb 2026 |
| Bridge Stores LL65 2HP | Retailers - other | 290 m | 5 Very good | 29 Jan 2026 |
| Lotus Garden LL65 2HP | Takeaway/sandwich shop | 290 m | 5 Very good | 13 Nov 2025 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 52 |
| Anti-social behaviour | 32 |
| Criminal damage and arson | 9 |
| Drugs | 4 |
| Public order | 4 |
| Other theft | 4 |
| Bicycle theft | 3 |
| Possession of weapons | 2 |
| Vehicle crime | 2 |
| Other crime | 2 |
| Burglary | 1 |
| Shoplifting | 1 |
Most of these are attached to: On or near Station Street (17); On or near Holborn Close (15); On or near Bryn Gwyn Road (11); On or near Gwynfa Hill (11); On or near Felin Wen (8).
Road safety
1 collision in which someone was hurt was reported on and around the street in 2021 to 2025: 0 fatal, 0 serious and 1 slight. 1 involved a cyclist. 100% happened in the dark. Most were on roads with a 20 mph limit.
| Year | Collisions | Fatal or serious |
|---|---|---|
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| Date | Severity | Who was hurt | Road | Conditions |
|---|---|---|---|---|
| 9 Feb 2025 22:15 | Slight | 1 person: 1 cyclist | Minor road, 20 mph | Dark, street lights on |
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
The busiest counted road within 500 m (0.3 miles) is the A55 between B4545 Kingsland Rd and A5154, with 15,918 motor vehicles a day on average in 2025, 420 m (0.3 miles) from the street's postcodes.
| Road | Between | Vehicles a day | Lorries | Ten years before | Distance |
|---|---|---|---|---|---|
| A5154 | A55 to Prince of Wales Rd | 3,048 estimated | 2% | -19% since 2015 | 340 m |
| A55 | A5154/A55 to A55/A5 Junction | 9,653 estimated; counted 2023 | 7% | 420 m (0.3 miles) | |
| A55 | B4545 Kingsland Rd to A5154 | 15,918 estimated | 7% | +29% since 2015 | 420 m (0.3 miles) |
| A55 | A55/A5 Junction to Rounabout near Ty Skinner / Skinner House | 6,320 estimated; counted 2023 | 13% | 430 m (0.3 miles) |
Each figure is the annual average daily flow: the motor vehicles passing the count point, both ways, on an average day of the year. A point is counted by hand on a weekday every few years and estimated from the trend on similar roads in between. Lorries are heavy goods vehicles, as a share of all motor vehicles.
People and work
Who lives here
| Around this street | Wales | |
|---|---|---|
| Median age | 38 | 43 |
| Children under 15 | 18% | 17% |
| Aged 65 and over | 17% | 21% |
Homes
| Around this street | Wales | |
|---|---|---|
| Owned (outright or with a mortgage) | 44% | 66% |
| Owned outright | 23% | 38% |
| Shared ownership | under 1% | under 1% |
| Social rented | 19% | 17% |
| Private rented | 36% | 17% |
Work and commuting
| Around this street | Wales | |
|---|---|---|
| Adults (16 and over) in work | 49% | 54% |
| Unemployment (of those working or looking for work) | 15% | 6% |
| Retired (of adults) | 21% | 25% |
| Long-term sick or disabled (of adults) | 8% | 6% |
| Work mainly from home (of those in work) | 14% | 26% |
| Travel to work by car or van | 51% | 61% |
| By train, Underground, metro or tram | 3% | under 1% |
| By any public transport, including bus | 8% | 3% |
| On foot or by bicycle | 23% | 8% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 61% | 60% |
| Work 30 km (19 miles) or more away | 22% | 10% |
Education and languages
| Around this street | Wales | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 17% | 32% |
| No qualifications | 20% | 20% |
| Apprenticeship as highest qualification | 7% | 6% |
| Main language English or Welsh (aged 3 and over) | 99% | 97% |
| Cannot speak English well or at all | 0% | under 1% |
Deprivation
The neighbourhood around this street is in decile 1 of 10 on the Welsh Index of Multiple Deprivation 2025, where 1 is the most deprived tenth of Wales's 1,917 neighbourhoods and 10 the least.
What has changed
- Food hygiene ratings Garlic Takeaway (takeaway/sandwich shop, LL65 1RN) newly listed: Awaiting inspection found 12 November 2026
- Food hygiene ratings M V Stena Estrid (restaurant/cafe/canteen, LL65 1DQ) re-inspected, still 5 Very good (rated 3 November 2026) found 12 November 2026
- Food hygiene ratings The Bread Basket (retailers - other, LL65 2HP) is no longer listed; it was rated 5 Very good found 30 October 2026
- Food hygiene ratings Reubens Cafe & Coffee (restaurant/cafe/canteen, LL65 1UF) newly listed: 5 Very good (rated 13 October 2026) found 30 October 2026
- Food hygiene ratings Pizzeria La Gondola (takeaway/sandwich shop, LL65 1RN) re-inspected, still 5 Very good (rated 21 October 2026) found 30 October 2026
Postcodes on this street
- LL65 1SP: 20 addresses of 21 in the postcode
Nearby streets
Fforddwynfa · Forcer Hill · Gwynfa Hill · Hawthorne Terrace · Gwynfa Lane · Ffordd Wynfa · Pump Street · Roberts Street · Plashyfryd Terrace · Lhassa Street · Mill Bank · Longford Road
All the streets in LL65 and across Isle of Anglesey.
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.