In fact, the world's longest bridge is a continuous span beam bridge. Almost 24 miles long, the Lake Ponchartrain Causeway consists of two, two-lane sections that run parallel to one another.

By the time it was complete, it would rank as the longest bridge in the world, according to the Guinness Book of World Records. Most of the bridge consists of prestressed concrete beam construction.

Lake Ponchartrain Causeway, Louisiana In fact, the world's longest bridge is a continuous span beam bridge. Almost 24 miles long, the Lake Ponchartrain Causeway consists of two, two-lane sections ...