The Susquehanna River Bridge is a innovative bridge type — known as the precast concrete segmental bridge the six-lane signature bridge cross’s the Susquehanna River just south of Harrisburg  The structure would become the first major vehicular bridge in Pennsylvania to employ segmental design and construction.
In segmental construction, precast concrete “box” sections are manufactured at a concrete plant located at or near the construction site and linked together to form a structure. Precast bridge pier sections are stacked one atop another, and bridge deck sections are connected in a row and hoisted or lowered onto the piers. In concept and in execution, the technique rather resembles the assembly of a child’s Lego structure.