Uploaded March 2011 | Updated September 2026, 3 weeks ago
The Lake Pontchartrain Causeway, or the Causeway, consists of two parallel bridges crossing Lake Pontchartrain in southern Louisiana, United States. The longer of the two bridges is either the fifth-longest or sixth-longest in the world depending on definitions, measuring at 23.87 miles (38.42 km) long. The Qingdao Haiwan Bridge in China's Shandong Province, at 26.4 miles (42.49 km), is the longest bridge over water.[2]The Bang Na Expressway, a viaduct in Bangkok, at 54 kilometres (33.55 mi), is excluded from most lists of longest bridges because it crosses water for only a minimal portion of its length. The newly opened Weinan Weihe Grand Bridge is longer but also classed as a viaduct.
The bridges are supported by 9,500 concrete pilings.[3] The two bridges feature bascule spans over the navigation channel 8 miles (13 km) south of the north shore. The southern terminus of the Causeway is in Metairie, Louisiana, a suburb of New Orleans. The northern terminus is at Mandeville, Louisiana.
The Lake Pontchartrain Causeway, or the Causeway, consists of two parallel bridges crossing Lake Pontchartrain in southern Louisiana, United States. The longer of the two bridges is either the fifth-longest or sixth-longest in the world depending on definitions, measuring at 23.87 miles (38.42 km) long. The Qingdao Haiwan Bridge in China's Shandong Province, at 26.4 miles (42.49 km), is the longest bridge over water.[2]The Bang Na Expressway, a viaduct in Bangkok, at 54 kilometres (33.55 mi), is excluded from most lists of longest bridges because it crosses water for only a minimal portion of its length. The newly opened Weinan Weihe Grand Bridge is longer but also classed as a viaduct.
The bridges are supported by 9,500 concrete pilings.[3] The two bridges feature bascule spans over the navigation channel 8 miles (13 km) south of the north shore. The southern terminus of the Causeway is in Metairie, Louisiana, a suburb of New Orleans. The northern terminus is at Mandeville, Louisiana.
