Boston University Bridge

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 the Boston University campus 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 . 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.

In 1949 it was renamed for Boston University, which lies at the southern end of the bridge, after a group of BU students went to the State House to propose a name change. State Senator John E. Powers sponsored the legislation and in May 1949 it passed with a unanimous vote. Contrary to popular belief, the bridge, with the Grand Junction Railroad Bridge which lies directly underneath, is not the only place in the world where a boat can sail under a train driving under a car driving under an airplane. Other such places include the Steel Bridge, in Portland, Oregon, and the 25 de Abril Bridge, in Lisbon, although on both those bridges are on the same span. In this case the rail and road traffic are on separate bridges.

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