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The Boston University Bridge (originally the Cottage Farm Bridge.) and commonly referred to as the BU Bridge, is a steel truss through arch bridge with a suspended deck carrying Route 2 over the Charles River, connecting Boston to Cambridge, Massachusetts. According to the American Association of State Highway and Transportation Officials route log, the bridge also carries U.S. Route 3 across the river to its southern terminus at U.S. Route 20 (also known as Commonwealth Avenue). However, the Massachusetts Department of Transportation does not consider the bridge to be a part of US 3; it continues the route along Memorial Drive in Cambridge until it meets Route 2A at the end of the Harvard Bridge. It was renamed for Boston University, which lies at the south end of the bridge, in 1949.〔 ==Construction== The BU Bridge was built in 1928, on a design by Andrew Canzanelli,〔 replacing an 1850s drawbridge〔 known as the Brookline Bridge.〔http://www.communityheritagemaps.com/cambridge_1873/cambridge_1873_zoomify/n.html〕 Canzanelli also designed the Weeks footbridge and the first shell constructed on the Esplanade. The bridge crosses diagonally over an older, now single-tracked railroad-only bridge carrying the Grand Junction Line. This bridge, formerly owned by CSX Transportation, was purchased by the Commonwealth of Massachusetts for the MBTA in 2010. The long-postponed Urban Ring mass transit project is expected to include a bridge at or near this location, to carry the planned route across the Charles River. During the period of planning for the Inner Belt, the BU Bridge represented the planned crossing point of the highway from Boston to Cambridge. Several plans were discussed for the area; had the expressway been built over the river, the bridge would have been demolished and replaced with a high-level highway overpass, while if the road had been built as a tunnel, the bridge would have been left standing as a crossing for surface route traffic. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Boston University Bridge」の詳細全文を読む スポンサード リンク
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