Mobility in medium and large Brazilian cities such as Rio de Janeiro has been characterized by the inefficient use of public space, together with the reduction in the use of public transport. Any change in routes and line frequencies in public transport, as well as the emergence of new technologies and variation of fares, have an effect on the distribution of passenger flows. Adding to this context, there is the current economic situation in Rio de Janeiro, where there are no resources left to invest in studies and in the implementation of improving the city s urban mobility. This work presents an analysis of alternative scenarios focused on the trains and on BRT connections, as they already have a pre-existing infrastructure, which would facilitate the construction of these works. This research shows how the works included in the scenarios proposed for 2016 and 2021 in the Rio de Janeiro Transport Master Plan are discrepant with the transport network in 2019 and, consequently, the flow of passengers on the network is different from the forecast. With the aid of the EMME software and using a simplified and more up-to-date transportation network in the Metropolitan Region of Rio de Janeiro, public transportation was allocated based on the optimal strategies model of Spiess (1983), contained in the EMME. Thus, it was verified how the construction of these new transport infrastructures would alter the flow of passengers. From these results, it can be concluded that investing in connections between modes and in works that are capable of removing a significant number of vehicles from the network is a key path for the metropolitan region as these investments make the transportation network less congested and improve the population s quality of life, in addition to following the call for more sustainable development of transport systems.