Traffic Noise Overlay

Traffic Noise overlay

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 are based solely on the Attributes of roads present in the 3D World.

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), as described on [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.

How-to's

• How to add and remove an Overlay
• How to edit an overlay legend

References

• The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: http://wetten.overheid.nl/BWBR0031722/2015-07-01#BijlageIII

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