other cities, the population of the affected area was largely unwilling to repeat similar costs for another expressway. The Interstate Highway Option, which allowed the state to transfer the $600 million earmarked for highway construction to fund the mass transit project, was not approved by Congress until 1973. Fred Salvucci described Sargent's decision to cancel the expressway before the Interstate Highway Option transfer as "It was like he jumped off the top of the Prudential Center and hoped that Alan Altshuer would have a new woven to catch him by the time he got to the bottom." The Route 128/I-93/I-95 interchange was nearly completed, leaving unused ramps north of the interchange and two unused bridges which were later removed. In 1973, the state planned to build a 300-space parking garage – to be served by express buses to Boston, Providence, and Logan Airport – on the stub end of I-95 just inside Route 128. However, the project was unpopular with residents in Milton. Two sections of the railroad embankment remain – one along Mindoro Street just north of Roxbury Crossing, and the other behind the former Highland Brewery at New Heath Street. Numerous granite blocks were recycled in the Southwest Corridor Park and as walls in the Emerald Necklace park system. In 1989, the Southwest Corridor project was awarded a Federal Design Achievement Award by the National Endowment for the Arts, which stated that "in its social vision, as well as its design and engineering requirements, the Southwest Corridor Project is a model for contemporary urban design. Current status Much like what had been planned for the median of the unbuilt Southwest Expressway/I-95 right-of-way, part of the corridor was later recycled into the new route for two tracks for the MBTA's Orange Line and three tracks for Amtrak's Northeast Corridor and the MBTA's Needham and Readville commuter lines with much of the surface area being developed as a linear park. The Amtrak trains used diesel until 1999 when Amtrak completed overhead catenary electrification of the line between New Haven and Boston. Several houses were torn down on the corner of Cummins Highway and Rowe Street in Roslindale to make room for an interchange. That land is now used as the Southwest Boston Community Gardens. Southwest Corridor Park The Southwest Corridor Park, maintained by the state DCR, has become a vibrant space for pedestrians, bicyclists, dog-walkers, amateur sports leagues, and community