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The Thomas P. "Tip" O'Neill Jr. Tunnel (colloquially O'Neill Tunnel) is a highway tunnel built as part of the Big Dig in Boston, Massachusetts.It carries the Central Artery underneath downtown Boston, and is numbered as Interstate 93 (I-93), U.S. Route 1 (US 1), and Route 3.
The connector would be located in a tunnel underneath Cambridge Street, entirely within the city of Boston. Various construction methods have been considered over the years, including cut-and-cover (C&C), sequential excavation method (SEM), and a deep-bore tunnel constructed using a tunnel boring machine (TBM). The project was originally ...
Sumner Tunnel, State Route 1A southwest-bound only, under Boston Harbor; Fort Point Tunnel, twin tunnels, Massachusetts Turnpike/I-90 under Fort Point Channel, Boston; Ted Williams Tunnel, twin tunnels, Massachusetts Turnpike/I-90 under Boston Harbor; Thomas P. O'Neill Jr. Tunnel, twin tunnels, 2003, I-93 (in coordination with the Dewey Square ...
Schematic map of Green Line branches and stations. The Green Line's core is the central subway, a group of tunnels which run through downtown Boston. [10] The Tremont Street subway runs roughly north–south through downtown, with stations at Boylston, Park Street, Government Center, Haymarket, and North Station – all with connections to other lines of the MBTA subway system.
The Ted Williams Tunnel is a highway tunnel in Boston, Massachusetts.The third in the city to travel under Boston Harbor, with the Sumner Tunnel and the Callahan Tunnel, it carries the final segment of Interstate 90 (the Massachusetts Turnpike) from South Boston towards its eastern terminus at Route 1A in East Boston, slightly beyond Logan International Airport.
The Sumner Tunnel is a road tunnel in Boston, Massachusetts, United States. It carries traffic under Boston Harbor in one direction, from Logan International Airport and Route 1A in East Boston . The tunnel originally deposited traffic at the west side of the North End , but with the completion of the Big Dig , it was modified to have two exits.
Streetcar congestion in downtown Boston led to the creation of underground subways and elevated rail, the former in 1897 and the latter in 1901. The Tremont Street subway was the first rapid transit tunnel in the United States and had a 24/7 service. [4]
The Big Dig was a megaproject in Boston that rerouted the then elevated Central Artery of Interstate 93 that cut across Boston into the O'Neill Tunnel and built the Ted Williams Tunnel to extend Interstate 90 to Logan International Airport. Those two projects were the origin of the official name, the Central Artery/Tunnel Project (CA/T Project).