**2.4 Road simulation process**

The aim of the noise map simulation is to make up a digital model of the town to obtain the noise propagation levels due to the traffic. The digital model is composed of: a ground digital model with the level curves (**Figure 3a**); obstacles, mainly buildings (**Figure 3b**); roads (**Figure 3c**), and receivers (**Figure 3d**) to evaluate the noise parameters.

When the digital model has been carried out, the next step consists of defining the characteristics of each one of the layers stated. Concerning roads, the data to define in the model are the ADT and ADS for light and heavy vehicles during the 3 day periods (day, evening, night).

To make this process easier, all the roads in the town have been classified according to the typologies defined in Section 2.2. The map in **Figure 4** shows the classification carried out. Then, the simulation results are obtained and compared with those from long time measurements and short-time measurements, and the noise map is adjusted.

*Noise Profile Categorization for Noise Mapping in Cities: The Case of Cuenca (Spain) DOI: http://dx.doi.org/10.5772/intechopen.104396*

#### **Figure 3.**

*Noise map process. (a) Ground layer. (b) Building layer. (c) Road layer. (d) Receivers.*

**Figure 4.** *Road classification.*
