Map layer: Noise
Noise shows calculated noise levels from roads, railways, metro and tram. It also shows the noise zones under T-1442 for roads, railways, airports and Armed Forces facilities. Use the layers when you assess a property along a busy road or railway, or want to see whether a planning area lies in a yellow or red noise zone.
Calculated, not measured
All the noise layers are calculated in a noise model from traffic volume, speed, terrain and buildings. None of them are measurements. The layers belong to two types of noise mapping, and they answer different questions:
| Strategic noise maps | Noise zones under T-1442 | |
|---|---|---|
| Layers | Noise Map – Rail, Noise Map – Road – Metropolitan, Rail/metro/tram noise, with the night variants | Noise mapping (T-1442) |
| Shows | Noise levels in 5 dB classes | Yellow and red noise zones |
| Traffic | Urban areas: the situation in 2022. Railways outside the cities: 2017 | Forecast for future traffic |
| Regulations | Forurensningsforskriften (Pollution Regulations) chapter 5 | Guideline T-1442 |
| Can be used in land use planning | No | Yes |
The levels are given as Lden or Lnight, outdoors in front of the facade and 4 metres above ground:
- Lden is the average noise over 24 hours. Noise in the evening (19:00-23:00) gets a 5 dB penalty, and noise at night (23:00-07:00) gets a 10 dB penalty. The penalties reflect that noise is more disturbing when people rest and sleep.
- Lnight is the average noise at night, 23:00-07:00, with no penalty.
Decibels use a logarithmic scale. 3 dB more means twice the sound energy, and 10 dB more is heard as roughly twice as loud. One step on the colour scale is therefore a noticeable difference.
The strategic noise maps use the same colour scale:
| Colour | Noise level |
|---|---|
| Green | 50-55 dB |
| Yellow | 55-60 dB |
| Orange | 60-65 dB |
| Red | 65-70 dB |
| Purple | 70-75 dB |
| Blue | Above 75 dB |
The maps show where you have reason to look more closely at noise. If you are designing a building or applying for a building permit, you need a noise report from an acoustics consultant.
When the data was updated
We fetch the strategic noise maps directly from Miljødirektoratet, so the map always shows the version they publish. This data is not updated continuously. It is collected every five years, most recently in 2022. The 2022 round has no data for railways outside the cities, so 2017 is still the latest there. See Miljødirektoratet: Strategic noise maps for the mapping rounds and downloads.
We get the T-1442 zones from Geodata AS, which fetches them from the facility owners every week. The table shows the status as of 16/10/2026:
| Layer or sublayer | Calculated | Latest version with us |
|---|---|---|
| Noise Map – Road – Metropolitan, with night | 2022 mapping round, calculated March-June 2022 | Directly from Miljødirektoratet |
| Noise Map – Rail – Metropolitan, with night | 2022 mapping round | Directly from Miljødirektoratet |
| Noise Map – Rail, with night | 2017 mapping round | Directly from Miljødirektoratet |
| Rail/metro/tram noise | Urban areas 2022, railways outside the cities 2017 | Directly from Miljødirektoratet |
| Noise mapping – roads (T-1442) | Forecast for traffic in 2040, base data from April 2023 | Retrieved 25/08/2026 |
| Noise zones – Bane NOR railway network | 2016 | Retrieved 12/03/2025 |
| Noise zones – Avinor airports | Between 2007 and 2023, different for each airport | Weekly from Geodata |
| Noise zones – Armed Forces airports | Forecast for 2026 | Retrieved 06/05/2026 |
| Noise zones for Armed Forces shooting and training areas | Different for each area | Retrieved 19/12/2025 |
For all sublayers with a retrieval date, this is the latest version the facility owner has published in Geonorge. An old calculation year means the facility owner has not recalculated the zones since then, not that we are behind.
Layers in this category (8)
| Layer | Description | Source |
|---|---|---|
| Rail/metro/tram noise | Calculated average 24-hour noise from railways and light rail at a height of 4 m | Miljødirektoratet |
| Noise mapping (T-1442) | Yellow and red noise zones for roads, railways, airports and Armed Forces facilities, calculated for future traffic | Geodata AS |
| Noise Map – Rail | Average 24-hour noise from railways at 4 metres above ground, modelled (not measured) | Miljødirektoratet |
| Noise Map – Rail (Night) | Average night-time noise from railways at 4 metres above ground, modelled (not measured) | Miljødirektoratet |
| Noise Map – Rail – Metropolitan | Average 24-hour noise from railways at 4 metres above ground, modelled (not measured), for the metropolitan areas of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen | Miljødirektoratet |
| Noise Map – Rail – Metropolitan (Night) | Average night-time noise from railways at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen | Miljødirektoratet |
| Noise Map – Road – Metropolitan | Average 24-hour noise from road traffic at 4 metres above ground, modelled (not measured), for the large cities of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen | Miljødirektoratet |
| Noise Map – Road – Metropolitan (Night) | Average night-time noise from road traffic at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen | Miljødirektoratet |
Rail/metro/tram noise
Calculated noise from railways, metro and tram. The urban areas are from the 2022 mapping round, and the railways outside the cities from 2017. Noise from rail-based traffic has different characteristics from road noise (more impulsive, and with greater variation between day and night), so it is shown in a separate layer. The layer combines 24-hour and night-time noise in the large cities with 24-hour noise along railways outside the cities, in classes from 50-55 dB to above 75 dB. Dataset: Rail/metro/tram noise, from Miljødirektoratet.
About the map layer
Average Lden noise from railways at a height of 4 metres. Modelled data, showing lines with at least 30,000 trains per year outside the cities (the situation around 2016).
Update frequency: when the source changes.
Noise mapping (T-1442)
T-1442 is the guideline from Klima- og miljødepartementet (the Norwegian Ministry of Climate and Environment) for handling noise in land use planning. The layer shows the noise zones that the facility owners have calculated under it. The zones are based on a forecast for future traffic, not on current traffic.
- Red zone is not suitable for noise-sensitive buildings such as homes, schools, nurseries and healthcare institutions.
- Yellow zone is an assessment zone. Noise-sensitive buildings can be permitted if they get adequate noise mitigation, for example a quiet side and a screened outdoor area.
The limits are different for each noise source:
| Sublayer | Facility owner | Yellow zone | Red zone |
|---|---|---|---|
| Noise mapping – roads (T-1442) | Statens vegvesen | Lden 55-65 dB | Lden above 65 dB |
| Noise zones – Bane NOR railway network | Bane NOR | Lden 58-68 dB | Lden above 68 dB |
| Noise zones – Avinor airports | Avinor | Lden 52-62 dB | Lden above 62 dB |
| Noise zones – Armed Forces airports | Forsvarsbygg | Lden 52-62 dB | Lden above 62 dB |
| Noise zones for Armed Forces shooting and training areas | Forsvarsbygg | Lden 35-45 dB or LAFmax 65-75 dB | Lden above 45 dB or LAFmax above 75 dB |
Roads, railways and aviation also have a limit for maximum noise level at night (23:00-07:00). It is L5AF 70 dB for the yellow zone and 85 dB for the red zone along roads, L5AF 75 dB and 90 dB along railways, and L5AS 80 dB and 90 dB for aviation. The zone follows whichever criterion gives the largest extent. The limits for shooting ranges apply to weapons below 20 mm calibre, so noise from heavy weapons is not included in the zones.
The road zones cover national and county roads. Municipal roads are not included, so a plot along a busy municipal street can have noise that the layer does not show. See Noise Map – Road – Metropolitan for the largest cities.
The municipality uses the T-1442 zones as a basis in zoning plans. A planning project within a yellow or red zone must document satisfactory noise levels indoors and in outdoor areas. The requirements are in guideline T-1442/2021.
About the map layer
Forecasts for red (Lden>65 dB) and yellow (Lden>55 dB) noise zones along national and county roads, calculated with NorStøy (Nord2000Road) based on traffic data from NVDB.
Update frequency: weekly.
Sublayers (10)
| Sublayers | Description |
|---|---|
| Noise mapping – roads (T-1442) | Noise mapping of road traffic under guideline T-1442. |
| Rock unit (area) | Area layer for road noise mapping. |
| Noise zones – Avinor airports | Noise zones for airports operated by Avinor. |
| Rock unit (area) | Area layer for airport noise mapping. |
| Noise zones – Bane NOR railway network | Noise zones for the national railway network. |
| Rock unit (area) | Area layer for railway noise mapping. |
| Noise zones – Armed Forces airports | Noise zones for military airports. |
| Rock unit (area) | Area layer for military airport noise mapping. |
| Noise zones – Armed Forces shooting & training areas (T-1442) | Noise zones for military shooting and training areas under T-1442. |
| Rock unit (area) | Area layer for shooting and training area noise mapping. |
You can turn the five sublayers on and off individually, and you can filter each of them by noise zone (red or yellow) and municipality in the filter panel.
Noise Map – Rail
Average 24-hour noise from railways at 4 metres above ground, modelled (not measured). The maps show the situation in 2017. Not for use in land use planning. The legend shows Lden in five classes: 55-60, 60-65, 65-70, 70-75 and above 75 dB.
About the map layer
Average 24-hour noise from railways at 4 metres above ground, modelled (not measured). The maps show the situation in 2016. Not for use in land use planning.
Update frequency: when the source changes.
Noise Map – Rail (Night)
Average night-time noise from railways at 4 metres above ground, modelled (not measured). The maps show the situation in 2017. Not for use in land use planning. The legend shows five classes: 55-60, 60-65, 65-70, 70-75 and above 75 dB.
About the map layer
Average night-time noise from railways at 4 metres above ground, modelled (not measured). The maps show the situation in 2016. Not for use in land use planning.
Update frequency: when the source changes.
Noise Map – Rail – Metropolitan
Average 24-hour noise from railways at 4 metres above ground, modelled (not measured), for the metropolitan areas of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen. The maps show the noise situation as it was in 2022. Not for use in land use planning. The legend shows Lden in six classes: 50-55, 55-60, 60-65, 65-70, 70-75 and above 75 dB.
About the map layer
Average 24-hour noise from railways at 4 metres above ground, modelled (not measured), for the metropolitan areas of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg and Fredrikstad. The maps show the noise situation as it was in 2016. The noise map cannot be used for land use planning.
Update frequency: when the source changes.
Sublayers (9)
| Sublayers | Description |
|---|---|
| Metropolitan areas | Urban areas included in the mapping of rail noise. |
| Coverage overview | Overview of the mapping coverage. |
| Level 1 | Coverage level 1. |
| Level 2 | Coverage level 2. |
| Level 3 | Coverage level 3. |
| Rail noise – metropolitan (24h) | Rail noise day-evening-night in metropolitan areas. |
| Rail noise (24h) | Rail noise day-evening-night. |
| Rail noise – metropolitan (night) | Rail noise at night in metropolitan areas. |
| Rail noise (night) | Rail noise at night. |
Noise Map – Rail – Metropolitan (Night)
Average night-time noise from railways at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen. The maps show the noise situation as it was in 2022. Not for use in land use planning. The legend shows six classes: 50-55, 55-60, 60-65, 65-70, 70-75 and above 75 dB.
About the map layer
Average night-time noise from railways at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg and Fredrikstad. The maps show the noise situation as it was in 2016. The noise map cannot be used for land use planning.
Update frequency: when the source changes.
Noise Map – Road – Metropolitan
Average 24-hour noise from road traffic at 4 metres above ground, modelled (not measured), for the large cities of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen. The maps show the noise situation as it was in 2022. Not for use in land use planning. The legend shows Lden in six classes: 50-54, 55-59, 60-64, 65-69, 70-74 and 75 dB and above.
About the map layer
Average 24-hour noise from road traffic at 4 metres above ground, modelled (not measured), for the large cities of Oslo, Bergen, Trondheim, Stavanger, Sarpsborg and Fredrikstad. The maps show the noise situation as it was in 2016. The noise map cannot be used for land use planning.
Update frequency: when the source changes.
Sublayers (9)
| Sublayers | Description |
|---|---|
| Metropolitan areas | Urban areas included in the road noise mapping. |
| Coverage overview | Overview of the mapping coverage. |
| Level 1 | Coverage level 1. |
| Level 2 | Coverage level 2. |
| Level 3 | Coverage level 3. |
| Road noise – metropolitan (24h) | Road noise day-evening-night in metropolitan areas. |
| Road noise (24h) | Road noise day-evening-night. |
| Road noise – metropolitan (night) | Road noise at night in metropolitan areas. |
| Road noise (night) | Road noise at night. |
Noise Map – Road – Metropolitan (Night)
Average night-time noise from road traffic at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg, Fredrikstad and Drammen. The maps show the noise situation as it was in 2022. Not for use in land use planning. The legend shows Lnight in five classes: 50-54, 55-59, 60-64, 65-69 and 70 dB and above.
About the map layer
Average night-time noise from road traffic at 4 metres above ground, modelled (not measured), for Oslo, Bergen, Trondheim, Stavanger, Sarpsborg and Fredrikstad. The maps show the noise situation as it was in 2016. The noise map cannot be used for land use planning.
Update frequency: when the source changes.
Tips
- The T-1442 zones are calculated for future traffic. A plot can lie in a yellow zone even if it is quiet there today, and a strategic noise map from 2017 or 2022 can show lower noise than the zone for the same place.
- The Pollution category contains the same noise layers: see Pollution for a combined view with air pollution and contaminated ground.
- Noise zones are not the same as a value discount: many homes in a yellow zone are valued highly because of their central location. Combine this with Property prices for a complete location assessment.