The Tren Urbano Project aimed for the long-term transformation of San Juan into a multi-centered, compact, dense and diversified metropolitan city weaving and improving its urban space and environmental resources. A+UD was instrumental in the development of this vision and the implementation of a Transit-Oriented Development (TOD) strategy for this project through a multidimensional task to shape a Corridor Development Vision, generate a series of Station Area Development Plans, and acted as an instrumental player in the creation of its Joint Development Program, the first Public-Private TOD initiative in San Juan that required legislation for its implementation.