Baltimore Beltway

The Francis Scott Key Bridge, also known originally as the Outer Harbor Crossing or simply as the Key Bridge or Beltway Bridge, is a steel arch-shaped continuous through truss bridge spanning the lower Patapsco River and outer Baltimore Harbor / Port in Baltimore, Maryland, United States. The main span of 1,200 feet is the third longest span of any continuous truss in the world. It is also the longest bridge in the Baltimore metropolitan area.

The bridge was opened in March 1977 and is named for the author of the American national anthem, the poem originally called "The Defence of Fort McHenry" written in September 1814 and later set to music and entitled the "Star Spangled Banner" by Frederick and Georgetown lawyer /amateur poet Francis Scott Key. The bridge is the outermost of three toll crossings of Baltimore's Harbor.

Source: Wikipedia