Burlington–Bristol Bridge

The Burlington–Bristol Bridge is a truss bridge with a lift span crossing the Delaware River from Burlington, New Jersey to Bristol Township, Pennsylvania in the United States. Construction of the bridge started on April 1, 1930, and the bridge opened to traffic on May 2, 1931. The bridge carries New Jersey Route 413 and Pennsylvania Route 413.

The two-lane bridge has a total length of 2,301 feet, and is operated by the Burlington County Bridge Commission. The lift span is 540 feet long.The center span is lifted by the action of two large concrete slabs of slightly greater weight than the lifted span, which block traffic when fully down. They are set in downwards motion to lift the bridge by a very slight action of the motors, as gravity does the rest. In 2016, traffic signals and barrier gates were installed at each end of the bridge for stopping traffic when the draw span is being lifted.

Source: Wikipedia