Boston has a new tunnel and is now inluded in the Things to do tips hehhehe that you must ride under it to experience it.The Big Dig and it was the most expensive highway project in the U.S. History.The Big Dig rerouted the Central Artery (Interstate 93), the chief highway through the heart of the city, into a 3.5-mile (5.6-km) tunnel. The project also included the construction of the Ted Williams Tunnel (extending Interstate 90 to Logan International Airport), the Leonard P. Zakim Bunker Hill Memorial Bridge over the Charles River, and the Rose Kennedy Greenway in the space vacated by the previous I-93 elevated roadway. It is fun to ride under this tunnel and through the Bunker Hill Memorial Bridge.
Officially titled the Central Artery/Tunnel Project, the Big Dig was a huge undertaking that continuously grew during its 15 years of construction. It was designed to replace much of the existing elevated I-93 corridor through downtown with an 8-10 lane underground highway and to construct a new tunnel to the airport. To make the project difficult, they decided to do it with minimal impact to traffic, meaning they would build an underground road beneath an existing, heavily used highway. Originally budgeted under $1 billion, the ever-rising budget is now approaching $15 billion.
Some of the improvements created by the Big Dig, besides increasing traffic flow through downtown, include the beautiful new Bunker Hill Bridge, a belt of green parkland through the city, and a feel that the city's historic downtown neighborhoods have been reunited after removal of the barrier formed by the iron highway.
Update in July 2006...a section of the Big Dig's roof where I-90 enters the Ted Williams Tunnel collapsed on a car, killing one. Gov. Mitt Romney said in response, "People should not have to drive through the Turnpike tunnels with their fingers crossed."