This research analyses some economic externalities generated by the Panama Metro Network. Vehicle congestions in cities produce annual losses of millions of dollars, affecting productivity sensitively. The social benefits of mass transit systems have a positive impact on the dynamics of metropolitan areas. This paper presents results related to the savings in travel times and their economic benefits, under various projected scenarios. These scenarios are compared with actual data of passenger mobilization of the Panama Metro Network. This paper is divided in 6 section. The first section corresponds to the introduction. The second section contained the general description of the Panama Metro network, both line 1 and line 2. The third section is about general methodology. The fourth section is presented the results and its discussion. The final section corresponds to the conclusion and future work.