The 16th Street Bridge, also known as the Piney Branch Bridge, is an automobile and pedestrian bridge that carries 16th Street NW over Piney Branch and Piney Branch Parkway in Washington, D.C. It was the first parabolic arch bridge in the United States. Construction on the first span began in 1905 as part of the northward extension of 16th Street, and was finished in 1907 but was never opened to traffic. The second span began construction in 1909 and was completed in 1910. The bridge was renovated in 1990, and again beginning in October 2014.

16th Street Northwest, briefly known as the Avenue of the Presidents, is a prominent north-south boulevard in Washington, D.C., located in Northwest D.C. The street was laid out as part of the 1791 L'Enfant Plan, which served as the original blueprint for the city. The street begins just north of the White House, across from Lafayette Square in the President's Park, and continues north along the Washington meridian until Blair Circle.