Basic noise maps calculation in Milan pilot area

This talk shows the actions and the results related to DYNAMAP project Task B5.1. Aim of this task is the calculation of basic noise maps for the urban pilot area (district 9 of Milan). Data acquisition and processing are the preliminary activities with the aim to create the digital model of noise sources and the noise propagation environment. Road traffic data have been analyzed and developed in order to divide road segments in groups, gained by action B1 (Sizing the monitoring network) results. Each road segment group have been associated with different base maps. A total of six basic noise maps were calculated from six scenarios. Difference between scenarios are in relation to the group of roads modeled. Before the calculation of the basic noise maps some calculation runs were performed to determine most suitable calculation parameters. In the first round, traffic flow condition was considered "continuous" for all road stretches and its influence in the simulation was verified. The occurrence of traffic congestion conditions during 24 hours was analyzed in relation to different values of the traffic flow/capacity ratio to calculate specific basic noise maps that will be used in typical time intervals in which the traffic jam occurs.