The Central Artery/Tunnel Project is the largest, most complex and technologically challenging highway project ever attempted in American history. The project will dramatically reduce traffic congestion and improve mobility in one of America's oldest and most congested major cities, improve the environment, and lay the groundwork for continued economic growth for millions of New Englanders in ...

Boston Central Artery/Tunnel History Site Contents Scheme Z chronology CA/T documents Contributed articles Plans & pictures Vertical file This website contains material useful to people studying the history of the CA/T highway, especially the Charles River crossing part of the project. During 1998, we operated an interactive website for the purpose of collecting original material from people who ...

Get HistoryChannel.com's inside story behind Boston's new underground and underwater highway project. Everything from engineering challenges to Big Dig trivia and resources about the most complex public works project ever undertaken in the United States.