Traffic Noise Overlay: Difference between revisions
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===Traffic=== | ===Traffic=== | ||
Traffic intensities for each type of traffic can be based on one of the following: | Traffic intensities for each type of traffic can be based on one of the following: | ||
* The [[Construction attributes (Traffic Noise Overlay)|Attributes of roads]] present in the [[3D World]]. | * The [[Construction attributes (Traffic Noise Overlay)|Attributes of roads]] present in the [[3D World]]. | ||
* [[Prequels (Traffic Noise Overlay)|Prequel Overlay]]s which define respective traffic intensities on a grid. | * [[Prequels (Traffic Noise Overlay)|Prequel Overlay]]s which define respective traffic intensities on a grid. | ||
The traffic intensities can be defined as one value or as an array of hourly values using the [[Hours (Traffic Noise Overlay)|HOURS model attribute]]. | |||
==Calculation== | ==Calculation== | ||
Revision as of 13:41, 25 February 2022
The Traffic Noise Overlay is a Grid Overlay which computes the amount of noise in dB(A) for any given location in the 3D World. The calculation takes into account traffic intensities and a number of environmental- and computation parameters to compute the noise impact. It also takes into account objects and terrain features which would block the transmission of noise.
The Overlay only computes noise from traffic. Although a background noise level can be configured, other sources of noise (such as windmills, air traffic, or factories) are explicitly excluded.
Configuration
- Main article: Model attributes (Traffic Noise Overlay)
The Traffic Noise Overlay has a number of options which allow it to be configured as desired. A configuration wizard is available.
The following aspects can be configured:
- Reference speed per vehicle type
- Noise and noise multipliers per vehicle type
- Background noise
Traffic
Traffic intensities for each type of traffic can be based on one of the following:
- The Attributes of roads present in the 3D World.
- Prequel Overlays which define respective traffic intensities on a grid.
The traffic intensities can be defined as one value or as an array of hourly values using the HOURS model attribute.
Calculation
- Main article: Traffic noise formula (Traffic Noise Overlay)
The Traffic Noise Overlay performs its calculations based on the Overlay's Attributes, and the Attributes of roads present in the 3D World. The calculations follow the standard rekenmethode 1 (SRM 1)[1].
Results
The following result types are available as output from the traffic noise calculations:
| Icon | Result type | Unit | Mode | Description |
|---|---|---|---|---|
| NOISE_DB | dB | The amount of noise in dB experienced at any given location, based on traffic noise and background noise levels. | ||
| EMISSION | dB | The amount of noise in dB emitted by traffic at any given location. |
Notes
- The Overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government.[1].
How-to's
References
- ↑ 1.0 1.1 SRM1 ∙ Reken- en meetvoorschrift geluid 2012, Bijlage III ∙ Found at: http://wetten.overheid.nl/BWBR0031722/2015-07-01#BijlageIII ∙ (last visited: 12-02-2022)