Lake Pontchartrain Causeway, Twin road bridge in Louisiana, United States.
The Lake Pontchartrain Causeway consists of two parallel bridges stretching 38.42 kilometers across Lake Pontchartrain, supported by 9,000 concrete pillars.
Construction of the first span began in 1948 after the Louisiana Legislature established the Causeway Commission, with the initial two-lane bridge opening in 1956.
The connection between Metairie and Mandeville transformed the North Shore communities by reducing travel time to New Orleans to 50 minutes.
The bridge operates with a toll system that funds maintenance, featuring bascule sections located 13 kilometers from the northern shore to accommodate water traffic.
The Guinness World Records recognizes this structure for having the longest continuous distance over water among bridges worldwide.
Location: Jefferson Parish
Location: St. Tammany Parish
Inception: August 30, 1956
Official opening: May 10, 1969
Made from material: reinforced concrete
GPS coordinates: 30.19972,-90.12278
Latest update: November 28, 2025 14:28
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