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The 4.5 mile (7.5 km) Huey P. Long Bridge in Jefferson Parish, Louisiana carries four lanes of US 90 and a two-track railroad line over the Mississippi River. Huey P. Long was a former governor of Louisiana. The bridge is a favorite railfan location, and is the longest railroad bridge in the U.S. The bridge is owned by the New Orleans Public Belt Railroad (AAR reporting mark NOPB), which is owned by the city of New Orleans and managed by the Public Belt Railroad Commission.
Lake Pontchartrain Causeway, La., - 126,122 feet: According to the Guinness Book of World Records, the Lake Pontchartrain Causeway is the longest continuous bridge passing over water, the waters of New Orleans's Lake Pontchartrain to be exact.