As a contribution to mobility in Bogota, Colombia, this research applied computerized modeling techniques to study how to improve public transportation by implementation of an intended light train (LRT) system along the important Carrera 7 avenue; this in consideration of its particular space limiting conditions. Using specialized software: firstly, with TransModeler, transit flow conditions were simulated in Carrera 7, between 34th and 53rd streets, intersections included, to determine possible traffic interferences with the supposed light train operation; secondly, a particular LRT train station, with an elevated waiting platform, was conceptually designed and modelled in a render format, adapted to the narrowest street section and with minimum lateral traffic interference. Carrera 7´s main problems of heavy traffic and congestion (producing high air pollution), together with its reduced physical space, cause a deficient public transportation service, with serious difficulties for implementation of the conventional TransMilenio, a BRT system. The results showed LRT operation possible in the sector under study, even in its limiting conditions and with no need of costly private property acquisitions; however, traffic interferences at intersections became evident. Being computerized modeling usefulness realized, it was recommended to continue studies for proposals to reduce LRT interferences with other vehicle transit.