2.2. Noise measurements
The noise along the stretches was characterized based on 232 measurements taken at different locations. On average, 60 points were evaluated along each stretch. The measurements were taken on virtually every street, both along the hubs and the streets perpendicular to them, to ensure that the acoustic maps would be as representative as possible of the noise levels in the areas of this study. Fig. 3 shows the location of the measuring points on Stretch 1.