During 1994 to 2003, Salvucci was a key developer, in collaboration with professor Nigel Wilson (MIT), of an innovative research and educational collaborative with the University of Puerto Rico and the Puerto Rico Highway and Transportation Authority, focused on development of Tren Urbano, a new rail transit system for San Juan, which has now been replicated in Chicago, London, Hong Kong, and San Sebastian (Spain), as well as the MBTA. Salvucci has also participated in restructuring the commuter rail and urban transit system in Buenos Aires, Argentina to use concession contracts with the private sector to renew the physical capital of the rail systems, and to improve passenger service.