This research project which intends to determine the levels of noise in the second section of T ranscaribe was dev eloped in Ma y and June, 2007, b y T ecnologico Comfenalco University Foundation Environmental Research Group (GIA). The development of Transcaribe system is a proposal to improve urban mobility in Cartagena by means of a high speed transportation system using high occupation buses with the aim of improving citizens’ life quality and city productivity as well. This mass transportation system project hopes to reduce acoustic levels. Through this research a weekly acoustic analysis which reflects the phenomenon of noise pollution in Cartagena de Indias, especially in the zone closed to Pedro de Heredia Avenue, an important avenue in the city was carried out.