"South Bay Interchange"@en . . . "2003Z"^^ . . "1997Z"^^ . . "The South Bay Interchange is a massive interchange in the South Bay region of Boston, Massachusetts, in the US. The interchange consists of Interstate 90, the Mass Pike Extension, and the Interstate 93 concurrency with US 1 and MA 3 south of the Thomas P. O'Neill Jr. Tunnel.The interchange was constructed beginning in the late 1990s as a major feature of the Big Dig project."@en .