the Chacahoula Swamp Bridge on U.S. 90, the Lake Pontchartrain Twin Spans on I-10, and the LaBranche Wetlands Bridge on I-310. The Maestri Bridge comes close, but runs short by two-tenths of a mile at roughly in total length. Louisiana is also home to the Norfolk Southern Lake Pontchartrain Bridge, which at is one of the longest railway bridges in the United States. The southern end of the Manchac Swamp Bridge (on the western edge of Lake Pontchartrain) is the western end of the I-10 Bonnet Carré Spillway Bridge (on the southwestern edge of Lake Pontchartrain), and the northern end of the LaBranche Wetlands Bridge is the eastern end of the I-10 Bonnet Carré Spillway Bridge; so these three bridges, by name, are in fact one contiguous bridge. The total driving distance on continuous elevated roadway is over . The bridge was designated as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers in 2013. Guinness World Records controversy For decades Lake Pontchartrain Causeway was listed by Guinness World Records as the longest bridge over water in the world. In July 2011 the Jiaozhou Bay Bridge in China was named by Guinness World Records as the 'longest bridge over water'. At that time there was some controversy in the United States as supporters of the former holder of the record, the Lake Pontchartrain Causeway, disagreed with Guinness World Records not calling the causeway the longest. Supporters made this claim based on its own definition i.e., the length of a bridge physically over water and concluded that the Lake Pontchartrain Causeway spans , and was therefore the longest. The Jiaozhou Bay Bridge spans water for only . However, Guinness World Records, using the criteria of measurement that included aggregate structures, such as land bridges on the ends and an under-sea tunnel, stated that the Jiaozhou Bay Bridge is long. Following this controversy in July 2011, Guinness World Records created two categories for bridges over water: continuous and aggregate lengths over water. Lake Pontchartrain Causeway then became the longest bridge over water (continuous), while Jiaozhou Bay Bridge became the longest bridge over water (aggregate). See also List of bridges in the United States List of longest bridges in the world Megaproject Prestressed concrete References External links The Causeway website https://web.archive.org/web/20090806091006/https://library.rice.edu/collections/WRC/finding-aids/manuscripts/0488 Historic American Engineering Record (HAER) documentation, filed under Causeway Boulevard, Metairie, Jefferson Parish, LA: Bascule bridges in the