South Bay Interchange

South Bay Interchange
Location
South Bay, Boston, Massachusetts
Coordinates:	42°20′46″N 71°03′36″W / 42.346°N 71.060°W / 42.346; -71.060Coordinates: 42°20′46″N 71°03′36″W / 42.346°N 71.060°W / 42.346; -71.060
Roads at junction:	I-90 I-93 US 1 Route 3
Construction
Constructed:	1997–2003
Opened:	2003 (2003)
Maintained by:	Massachusetts Department of Transportation
Map

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.^[1]

The interchange was constructed beginning in the late 1990s as a major feature of the Big Dig project. By using a variety of methods including soil freezing and tunnel jacking to maintain adjacent subway, freight and commuter rail operations, engineers were able avoid major interruption of existing traffic flows. The name South Bay originates from the state of the area prior to nineteenth century land reclamation efforts which filled an area of marshes and brackish water that was an estuary of Boston Harbor with dirt from nearby high ground.^[2]

Overlooking South Bay Interchange toward the south-southwest from One Financial Center in Boston

References

External links

• Design and Construction of Driven Pile Foundations: Lessons Learned on the Central Artery/Tunnel Project Federal Highway Administration

v t e Road transportation infrastructure of Boston Interstate Highways I-90 (Mass Pike) I-93 I-95 U.S. Routes US 1 US 3 US 20 State Routes Route 1A Route 2 Route 2A Route 3 Route 9 Route 28 Route 30 Route 99 Route 128 Route 145 Route 203 Parkways Arborway Blue Hills Day Boulevard Fenway Jamaicaway Memorial Drive Morrissey Boulevard Morton Street Park Drive Riverway Stony Brook Soldiers Field Road Storrow Drive Truman VFW West Roxbury Major streets Beacon Street Bennington Street Boylston Street Columbus Avenue Commonwealth Avenue Dorchester Avenue Huntington Avenue Massachusetts Avenue Newbury Street State Street Tremont Street Washington Street Bridges Anderson Boston University Bowker Overpass Charlestown Eliot Harvard Leverett Circle Connector Longfellow North Beacon Street Tobin Zakim Bunker Hill Tunnels Callahan Dewey Square Sumner Thomas P. O'Neill Jr Ted Williams Expressways East Boston John F. Fitzgerald (Central Artery) Northeast Northern Northwest Southeast Southwest (Southwest Corridor) Western Yankee Division Interchanges Braintree Split South Bay Interchange See also Big Dig Boston Post Road Emerald Necklace Inner Belt Expressway (unbuilt) Charles River Crossings Streets in Boston Numbered Routes in MA