Hudson Way Grantham, South Kesteven
136 addresses across 3 postcodes (NG31), about 700 m (0.4 miles) long, classed as a local road. USRN 35880278.
- Sales: 259 recorded sales since 1995; in 2026 the median was £191,000 across 2 sales.
- Energy: 115 homes have an energy certificate (B: 5, C: 99, D: 11).
- Flood: 16 addresses on its postcodes are in areas 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 A; Band D in South Kesteven costs £2,260 a year in 2026-27.
- Broadband: Gigabit broadband is available to 100% of premises.
- Transport: The nearest railway station is Grantham, about 330 m away in a straight line.
- Green space: There is a small park or garden about 750 m (0.5 miles) away, and Dysart Park (3.7 hectares) is about 760 m (0.5 miles) away.
- Air: Background air pollution in 2024 was 6.5 µg/m³ of nitrogen dioxide and 6.9 of PM2.5, within UK legal limits.
- Height: Its addresses are 64 to 66 m above sea level.
- Noise: 7 of its 136 addresses are modelled at 55 dB or more from road traffic.
- Doctors: The nearest GP surgery is St. Johns Medical Centre, about 570 m (0.4 miles) away, with 4 practices within 1.6 km (1 mile).
- People: About 870 people lived in the census areas around it in 2021; 38% of households owned their home and 25% of adults held a degree or other higher qualification.
- Crime: 111 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 | 2 | £191,000 | £147,000 | £235,000 |
| 2025 | 6 | £142,500 | £110,000 | £225,000 |
| 2024 | 4 | £155,500 | £115,000 | £225,000 |
| 2023 | 5 | £112,500 | £110,000 | £255,000 |
| 2022 | 8 | £102,750 | £88,000 | £188,000 |
| 2021 | 6 | £146,000 | £88,000 | £190,050 |
| 2020 | 1 | £127,000 | £127,000 | £127,000 |
| 2019 | 3 | £185,000 | £122,000 | £210,000 |
| 2018 | 6 | £168,000 | £96,000 | £187,500 |
| 2017 | 7 | £137,000 | £87,950 | £169,000 |
| 2016 | 9 | £143,000 | £98,500 | £175,000 |
| 2015 | 3 | £164,950 | £99,950 | £168,000 |
| Date | Address | Type | Price | Notes |
|---|---|---|---|---|
| 18 Jun 2026 | 102 NG31 7BX | Semi-detached | £235,000 | |
| 30 Mar 2026 | 90 NG31 7BX | Semi-detached | £147,000 | |
| 25 Nov 2025 | 37 NG31 7BU | Semi-detached | £184,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 31 Oct 2025 | 116 NG31 7BX | Terraced | £120,000 | |
| 25 Sep 2025 | 108 NG31 7BX | Flat or maisonette | £117,000 | Leasehold. |
| 28 May 2025 | 10 NG31 7BX | Flat or maisonette | £110,000 | |
| 11 Apr 2025 | 95 NG31 7BU | Terraced | £225,000 | |
| 18 Feb 2025 | 82 NG31 7BX | Semi-detached | £165,000 | |
| 28 Jan 2025 | 64 NG31 7BX | Semi-detached | £185,000 | |
| 13 Dec 2024 | 85 NG31 7BU | Detached | £225,000 | |
| 10 Dec 2024 | 77 NG31 7BU | Flat or maisonette | £120,000 | Leasehold. |
| 21 Jun 2024 | 91 NG31 7BU | Flat or maisonette | £115,000 | Leasehold. |
| 19 Jan 2024 | 42 NG31 7BX | Semi-detached | £191,000 | |
| 14 Nov 2023 | 81 NG31 7BU | Flat or maisonette | £112,000 | Leasehold. |
| 3 Apr 2023 | 146 NG31 7BX | Flat or maisonette | £112,500 | Leasehold. |
| 15 Mar 2023 | 47 NG31 7BU | Detached | £255,000 | |
| 28 Feb 2023 | PLOT 310 NG31 7BX | Flat or maisonette | £110,000 | Leasehold. |
| 13 Jan 2023 | 59 NG31 7BU | Detached | £245,000 | |
| 16 Dec 2022 | 89 NG31 7BU | Flat or maisonette | £135,000 | Leasehold. |
| 9 Dec 2022 | 88 NG31 7BX | Terraced | £177,500 | |
| 21 Oct 2022 | 124 NG31 7BX | Terraced | £188,000 | |
| 8 Jul 2022 | 117 NG31 7BU | Terraced | £175,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 3 May 2022 | 142 NG31 7BX | Flat or maisonette | £95,000 | Leasehold. |
| 22 Apr 2022 | 106 NG31 7BX | Flat or maisonette | £101,500 | Leasehold. |
| 14 Mar 2022 | 94 NG31 7BX | Terraced | £104,000 | |
| 2 Mar 2022 | 144 NG31 7BX | Flat or maisonette | £88,000 | Leasehold. |
| 28 Feb 2022 | 148 NG31 7BX | Flat or maisonette | £88,000 | Leasehold. |
| 5 Aug 2021 | 67 NG31 7BU | Semi-detached | £187,500 | |
| 2 Aug 2021 | 102 NG31 7BX | Semi-detached | £190,050 | |
| 23 Jul 2021 | 122 NG31 7BX | Terraced | £147,000 | |
| 23 Jul 2021 | 75 NG31 7BU | Flat or maisonette | £97,000 | Leasehold. |
| 18 Jun 2021 | 49 NG31 7BU | Detached | £200,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 11 Jun 2021 | 140 NG31 7BX | Flat or maisonette | £88,000 | Leasehold. |
| 14 May 2021 | 62 NG31 7BX | Semi-detached | £145,000 | |
| 20 Jan 2021 | 136 NG31 7BX | Terraced | £145,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 3 Nov 2020 | 7 NG31 7BU | Terraced | £127,000 | |
| 25 Sep 2019 | 84 NG31 7BX | Terraced | £122,000 | |
| 21 Jun 2019 | 33 NG31 7BU | Detached | £210,000 | |
| 9 May 2019 | 5 NG31 7BU | Detached | £185,000 | |
| 25 Jan 2019 | 56 NG31 7BX | Semi-detached | £132,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 16 Nov 2018 | 58 NG31 7BX | Semi-detached | £133,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 22 Oct 2018 | 55 NG31 7BU | Detached | £187,500 | |
| 11 Oct 2018 | 108 NG31 7BX | Flat or maisonette | £96,000 | Leasehold. |
| 7 Aug 2018 | 80 NG31 7BX | Terraced | £161,000 | |
| 27 Apr 2018 | 76 NG31 7BX | Detached | £178,000 | |
| 29 Mar 2018 | 97 NG31 7BU | Terraced | £175,000 | |
| 2 Feb 2018 | 96 NG31 7BX | Detached | £135,000 | Not a standard sale (repossession, buy-to-let or transfer). |
| 23 Jan 2018 | 110 NG31 7BX | Flat or maisonette | £96,950 | Leasehold. |
| 6 Nov 2017 | 44 NG31 7BX | Detached | £142,000 | |
| 31 Oct 2017 | 114 NG31 7BX | Detached | £130,000 | Not a standard sale (repossession, buy-to-let or transfer). |
Energy performance certificates
115 homes with a current certificate; median floor area 69 m². Most common: House, semi-detached (25); Flat (24); House, mid-terrace (22). Built: 2003-2006 (95); 1996-2002 (16); 2007 onwards (2). Tenure at assessment: rented (private) (57); owner-occupied (42).
Each home's certificates and sales (62 addresses)
- 3, Hudson Way
- 4, Hudson Way
- 5, Hudson Way
- 6, Hudson Way
- 7, Hudson Way
- 11, Hudson Way
- 12, Hudson Way
- 15, Hudson Way
- 20, Hudson Way
- 23, Hudson Way
- 25, Hudson Way
- 29, Hudson Way
- 31, Hudson Way
- 33, Hudson Way
- 35, Hudson Way
- 37, Hudson Way
- 39, Hudson Way
- 40, Hudson Way
- 46, Hudson Way
- 48, Hudson Way
- 50, Hudson Way
- 51, Hudson Way
- 52 Hudson Way
- 55, Hudson Way
- 60, Hudson Way
- 64, Hudson Way
- 66, Hudson Way
- 67, Hudson Way
- 69, Hudson Way
- 70, Hudson Way
- 73, Hudson Way
- 74, Hudson Way
- 75, Hudson Way
- 76, Hudson Way
- 80, Hudson Way
- 81, Hudson Way
- 82, Hudson Way
- 83, Hudson Way
- 84, Hudson Way
- 87, Hudson Way
- 91, Hudson Way
- 92, Hudson Way
- 96, Hudson Way
- 97, Hudson Way
- 98, Hudson Way
- 99, Hudson Way
- 104, Hudson Way
- 106, Hudson Way
- 107, Hudson Way
- 109 Hudson Way
- 110, Hudson Way
- 113, Hudson Way
- 115, Hudson Way
- 121 Hudson Way
- 124, Hudson Way
- 126, Hudson Way
- 130, Hudson Way
- 134, Hudson Way
- 136, Hudson Way
- 140, Hudson Way
- 144, Hudson Way
- 148, Hudson Way
Council tax
What each band costs in South Kesteven in 2026-27: Band D £2,260 a year on average, including the police, fire and any county and parish charges.
| A | B | C | D | E | F | G | H |
|---|---|---|---|---|---|---|---|
| £1,507 | £1,758 | £2,009 | £2,260 | £2,762 | £3,264 | £3,767 | £4,520 |
Homes by band in the neighbourhoods around this street: most are in band A (75% of about 2,300 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)
- Old Tannery, Earlsfield Lane: up to 11 homes, not permissioned (510 m (0.3 miles))
Roadworks
Finished in the last three months
- 9 October 2026: BT, New service connection, no carriageway incursion, on the footway (minor works)
- 3 September 2026 to 7 September 2026: BT, Utility asset works, some carriageway incursion, on the footway (minor works)
Flood risk
Rivers, the sea or surface water: in this street's postcodes, 5 addresses are in areas at high risk, 11 at medium risk and 44 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 |
|---|---|---|---|
| NG31 7BX | not in 2 or 3 | 0 / 4 / 25 | unlikely |
| NG31 7BU | not in 2 or 3 | 5 / 4 / 14 | unlikely |
| NG31 7BD | not in 2 or 3 | 0 / 3 / 5 | unlikely |
Height above sea level
The street's 136 addresses are between 64 m and 66 m above sea level (65 m on average).
Broadband
| Postcode | Superfast (30 Mbit/s+) | Ultrafast (300 Mbit/s+) | Gigabit | Below 10 Mbit/s |
|---|---|---|---|---|
| NG31 7BD | 100% | 100% | 100% | 0% |
| NG31 7BU | 100% | 100% | 100% | 0% |
| NG31 7BX | 100% | 100% | 100% | 0% |
Getting around
| Nearest | Distance | |
|---|---|---|
| Railway stations | Grantham 1.5 million journeys in 2024–25 | 330 m |
| Bottesford 57,000 journeys in 2024–25 | 11.1 km (6.9 miles) | |
| Ancaster 5,530 journeys in 2024–25 | 11.9 km (7.4 miles) | |
| Bus stops | 12 stops within 400 m (0.2 miles), 34 within 800 m (0.5 miles); nearest 140 Huntingtower Road Grantham | 90 m |
| Bus or coach station | Bus Station Grantham | 660 m (0.4 miles) |
| EV charging points | 3 within 1.6 km (1 mile); nearest InstaVolt Charging Station | 540 m (0.3 miles) |
| Airport with scheduled flights | East Midlands Airport EMA | 46.7 km (29 miles) |
Local services
| Nearest | Distance | |
|---|---|---|
| GP surgeries | 4 practices within 1.6 km (1 mile); nearest St. Johns Medical Centre | 570 m (0.4 miles) |
| Pharmacies | 7 pharmacies within 1.6 km (1 mile); nearest Boots | 570 m (0.4 miles) |
| NHS dentists | 6 practices within 1.6 km (1 mile); nearest The Maltings Dental Practice | 470 m (0.3 miles) |
| Hospital | Grantham & District Hospital | 1.9 km (1.2 miles) |
| Police station | Lincolnshire Police | 1.1 km (0.7 miles) |
| Cash machines | 4 machines within 800 m (0.5 miles); nearest Grantham Station NatWest | 320 m |
Parks and green space
| Nearest | Distance | |
|---|---|---|
| Park or garden | 2 within 800 m (0.5 miles); nearest Unnamed 2,110 m² | 750 m (0.5 miles) |
| Largest park within 800 m (0.5 miles) | Dysart Park 3.7 ha | 760 m (0.5 miles) |
| Play area | 2 within 800 m (0.5 miles); nearest Unnamed 700 m² | 300 m |
| Playing field | 1 within 800 m (0.5 miles); nearest Unnamed 5,050 m² | 380 m |
| Allotments | 5 within 800 m (0.5 miles); nearest Unnamed 760 m² | 140 m |
Within 800 m (0.5 miles): 2 parks and gardens, 3.9 hectares in all.
Landmarks
The nearest historic landmark is George Hotel, a listed building (Grade II*), 1 km (0.6 miles) north. 65 listed buildings are within 1 km (0.6 miles), 1 of them Grade II*.
| Name | What it is | From the middle of the street |
|---|---|---|
| George Hotel | Listed building, Grade II* | 1 km (0.6 miles) north |
| Conduit House, Market Place | Scheduled monument | 1 km (0.6 miles) north |
| Grantham market cross | Scheduled monument | 1 km (0.6 miles) north |
| Harlaxton Manor | Registered park or garden, Grade II* | 3 km (1.8 miles) south-west |
| Name | What it is | From the middle of the street |
|---|---|---|
| Hall's Hill | Hill | 2 km (1.2 miles) north-east |
| Warren Plantation | Wood | 2.1 km (1.3 miles) south |
| Harlaxton Wood | Wood | 2.5 km (1.5 miles) south-west |
| Darby's Plantation | Wood | 2.7 km (1.7 miles) south-east |
| Twentytwo Acre Plantation | Wood | 2.8 km (1.7 miles) south-east |
| Villa Pond | Lake or reservoir | 3.9 km (2.4 miles) north-east |
Air quality
| Pollutant | Here | UK limit | WHO guideline |
|---|---|---|---|
| Nitrogen dioxide (NO2) | 6.5 | 40 | 10 |
| Fine particles (PM2.5) | 6.9 | 20 | 5 |
| Particles (PM10) | 12.5 | 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 |
|---|---|---|
| 70 to 74 | 1 | 0 |
| 60 to 64 | 0 | 1 |
| 55 to 59 | 6 | 16 |
| Under 55 | 129 | 119 |
7 of the street's 136 addresses are modelled at 55 dB or more from road traffic, and 17 from railways, 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 South Kesteven: see them on the South Kesteven page.
Nearest schools
| School | Phase | Ages | Distance | Inspection |
|---|---|---|---|---|
| Huntingtower Community Primary Academy | Primary | 4–11 | 320 m | Report card (Jan 2026): Curriculum and teaching: Expected standard; Achievement: Needs attention; Attendance and behaviour: Strong standard; Personal development and wellbeing: Expected standard; Inclusion: Expected standard; Leadership and governance: Expected standard; Early years: Expected standard; Safeguarding standards: Met |
| The Isaac Newton Primary School | Primary | 4–11 | 1 km (0.6 miles) | No overall grade (Feb 2025, graded inspection without an overall judgement): Quality of education: Good; Behaviour and attitudes: Outstanding; Personal development: Good; Leadership and management: Good |
| St Anne's Church of England Primary School, Grantham | Primary | 4–11 | 1 km (0.6 miles) | No published inspection |
| Walton Academy | Secondary | 11–18 | 1 km (0.7 miles) | Good (Nov 2022, overall grade under the previous framework) |
| Grantham College | 16 plus | 16–99 | 1.2 km (0.7 miles) | No published inspection |
| St Wulfram's National Church of England Primary School | Primary | 4–11 | 1.2 km (0.7 miles) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Requires improvement; Behaviour and attitudes: Requires improvement; Personal development: Good; Leadership and management: Good |
| West Grantham Church of England Secondary Academy | Secondary | 11–16 | 1.2 km (0.8 miles) | Good (Jan 2024, overall grade under the previous framework) |
| Kesteven and Grantham Girls' School | Secondary | 11–18 | 1.3 km (0.8 miles) | Outstanding (Sep 2023, overall grade under the previous framework) |
| West Grantham Church of England Primary Academy | Primary | 3–11 | 1.3 km (0.8 miles) | Good (Oct 2023, overall grade under the previous framework) |
| The King's School, Grantham | Secondary | 11–18 | 1.4 km (0.8 miles) | Good (Dec 2022, overall grade under the previous framework) |
| Saint Mary's Catholic Voluntary Academy Roman Catholic | Primary | 4–11 | 1.6 km (1 mile) | No overall grade (Jun 2025, graded inspection without an overall judgement): Quality of education: Requires improvement; Behaviour and attitudes: Good; Personal development: Good; Leadership and management: Good |
| Wyndham Park Nursery School | Nursery | 2–5 | 1.7 km (1 mile) | No published inspection |
Food hygiene ratings nearby
| Business | Type | Distance | Rating | Rated |
|---|---|---|---|---|
| Wellies Fish & Chips NG31 7AY | Takeaway/sandwich shop | 80 m | 5 Very good | 4 Jun 2025 |
| Headstart Clubhouse NG31 7AU | Hospitals/Childcare/Caring Premises | 180 m | 5 Very good | 7 Mar 2023 |
| Grantham Railway Sports and Social Club NG31 7AU | Pub/bar/nightclub | 180 m | 5 Very good | 17 Sep 2025 |
| Ideal Catering Ltd T/A Ideal School Meals NG31 7AU | Other catering premises | 180 m | 5 Very good | 18 May 2026 |
| Premier Express NG31 7BD | Retailers - other | 190 m | 5 Very good | 19 Dec 2025 |
| Lincolnshire Co-op Springfield Road Food Store NG31 7GQ | Retailers - supermarkets/hypermarkets | 240 m | 5 Very good | 6 Oct 2026 |
| Apple Trees Care and Reablement Centre NG31 7GQ | Hospitals/Childcare/Caring Premises | 250 m | 5 Very good | 29 Oct 2025 |
| Lace Housing NG31 7GJ | Hospitals/Childcare/Caring Premises | 340 m | 5 Very good | 18 Aug 2025 |
| Starbucks NG31 6BT | Restaurant/Cafe/Canteen | 360 m | 5 Very good | 15 Sep 2025 |
| Costa Coffee NG31 6BT | Restaurant/Cafe/Canteen | 360 m | 5 Very good | 1 Nov 2024 |
| The Whistle Stop Micro Pub NG31 6BT | Pub/bar/nightclub | 360 m | 4 Good | 2 Jul 2026 |
| St John's Spitalgate Community Fridge NG31 6HX | Retailers - other | 370 m | 5 Very good | 9 Sep 2026 |
| Royal Windsor NG31 7AG | Hospitals/Childcare/Caring Premises | 370 m | 5 Very good | 14 Jul 2026 |
| The Early Birdy NG31 7BW | Other catering premises | 380 m | 4 Good | 23 Sep 2026 |
| Waffle Stack NG31 7BJ | Mobile caterer | 410 m (0.3 miles) | 5 Very good | 26 Feb 2025 |
Crime within 250 m
| Category | Crimes |
|---|---|
| Violence and sexual offences | 54 |
| Anti-social behaviour | 21 |
| Criminal damage and arson | 12 |
| Vehicle crime | 7 |
| Other crime | 6 |
| Public order | 3 |
| Other theft | 3 |
| Shoplifting | 1 |
| Bicycle theft | 1 |
| Possession of weapons | 1 |
| Robbery | 1 |
| Burglary | 1 |
Most of these are attached to: On or near Wilks Road (24); On or near Springfield Road (15); On or near Bradley Drive (15); On or near Burrows Close (15); On or near Tilling Close (14).
People and work
Who lives here
| Around this street | England | |
|---|---|---|
| Median age | 32 | 40 |
| Children under 15 | 23% | 17% |
| Aged 65 and over | 5% | 18% |
Homes
| Around this street | England | |
|---|---|---|
| Owned (outright or with a mortgage) | 38% | 61% |
| Owned outright | 10% | 33% |
| Shared ownership | 8% | 1% |
| Social rented | 21% | 17% |
| Private rented | 33% | 21% |
Work and commuting
| Around this street | England | |
|---|---|---|
| Adults (16 and over) in work | 73% | 57% |
| Unemployment (of those working or looking for work) | 4% | 6% |
| Retired (of adults) | 6% | 22% |
| Long-term sick or disabled (of adults) | 5% | 4% |
| Work mainly from home (of those in work) | 16% | 32% |
| Travel to work by car or van | 60% | 48% |
| By train, Underground, metro or tram | 2% | 4% |
| By any public transport, including bus | 3% | 8% |
| On foot or by bicycle | 20% | 10% |
| Work within 10 km (6 miles) of home (of those who travel to work) | 64% | 65% |
| Work 30 km (19 miles) or more away | 15% | 8% |
Education and languages
| Around this street | England | |
|---|---|---|
| Degree or other higher qualification, Level 4+ (of adults) | 25% | 34% |
| No qualifications | 18% | 18% |
| Apprenticeship as highest qualification | 4% | 5% |
| Main language English (aged 3 and over) | 83% | 91% |
| Cannot speak English well or at all | 2% | 2% |
Deprivation
The neighbourhoods around this street are all in decile 4 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
- Roadworks Street works permit: BT: New service connection, 9 October 2026 to 13 October 2026 (no carriageway incursion) found 3 November 2026
Postcodes on this street
- NG31 7BX: 75 addresses of 76 in the postcode
- NG31 7BU: 60 addresses of 61 in the postcode
- NG31 7BD: 1 address of 37 in the postcode
Nearby streets
Bradley Drive · Hardwick Close · Atlantic Place · Tilling Close · Wilks Road · Huntingtower Road · Garnet Mews · Mayflower Mews · Burrows Close · Porter Square · Arlington Gardens · Ormonde Close
All the streets in NG31 and across South Kesteven.
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.