Featuring former U.S. Secretary of Transportation Rodney Slater and former Secretary of Transportation of the Commonwealth of Massachusetts Fred Salvucci, our March 5 Open Garage Talk focused on their work which led to profound transformations of urban space in the U.S., including Boston's Big Dig and the reconstruction of the Cypress St. viaduct as Mandela Parkway following the 1989 Loma Prieta earthquake. V iew the recording here.