Selection of transit modes is one of the most important decisions in the transit planning process. A particularly important decision is the selection between bus and rail modes, because it influences the type of service that will be offered and, more importantly, the role transit will play in the city. Ultimately, such a decision has an impact on the quality of life in the city. It is therefore necessary to include in the selection process the physical and economic characteristics of modes, as well as the quality of service, attraction of passengers and the impacts of the transit system on its served area and the entire city or suburb.