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Project-specific details are entered in the TNM 2.5 software to depict the roads, receivers, and topography. Other factors such as speed limit, traffic volume and type of traffic are also entered. The output of the model is a table that shows the noise level at each analyzed location, or receiver. The model is developed for both existing and future traffic conditions.
The traffic noise model is based on a source, path, receiver relationship. The source of the noise is the traffic on the road. The receiver is the analysis location, and the path is anything that is between the source and receiver. The model can account for rows of buildings, hills, dense vegetation, and changes in ground type, such as a pond or parking lot.
