This study examined the environmental impact of noise generated by road traffic in a large city in Latin America, based on in situ measurements of sound pressure levels and sound mapping. The object of this study is the main urban traffic hubs in the city of Curitiba. Along these road stretches, we sought to identify so-called “noise sensitive areas” such as hospitals, and based on acoustic maps, identify the noise levels that reach these buildings. Through acoustic maps, a reference scenario was evaluated that represents the current state of urban noise in these traffic hubs. Three distinct hypothetical scenarios were also simulated to evaluate the noise that reaches the aforementioned sensitive areas.