7.
TRAFFIC NOISE MODELLING
7.1
GENERAL METHODOLOGIES
The concerns raised by the Department of Transport and Council have related to potential noise impacts associated with future vehicle movements along the new Bells Road extension. In consideration of the above, the focus of the assessment has been noise associated with Bells Road and has not included consideration of vehicle movements along other nearby roads. Determination of traffic noise emissions associated with vehicle movements along Bells Road have been calculated using the methodologies and procedures described within Calculation of Road Traffic Noise - Department of Transport Welsh office (CoRTN). Implementing CoRTN procedures as a basis for predicting traffic noise levels adjacent to major roadways is the preferred noise modelling approach of the Department of Transport as is noted within the ‘Interpretation & Application of VicRoads Traffic Noise Policy’ document. The algorithms associated with CoRTN allow for consideration of the following input parameters which have the potential to influence noise emissions associated with traffic movements. ▪ Traffic flow volumes (vehicles per 18-hours). ▪ Proportion of heavy vehicles. ▪ Traffic speeds. ▪ Ground surface contour information. ▪ Road surface contour information. ▪ Road surface type. ▪ Location and elevation of road carriageways. ▪ Location and elevation of user defined noise receptor points. For this assessment, WMG has implemented the CoRTN procedures and predicted traffic noise levels utilising DataKustik CadnaA 2021 environmental noise modelling software. Relevant information regarding site elevations, site buildings and the surrounding environment has been provided by the client and sourced from online databases where appropriate. The model has been developed and configured with sufficient detail for appropriate noise emission calculations to be undertaken.
12652-2.1jg
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