The Maestri Bridge (originally known as the Pontchartrain Bridge and later as the Watson-Williams Pontchartrain Bridge and the Five Mile Bridge) carries U.S. Route 11 (US 11) across Lake Pontchartrain between New Orleans and Slidell, Louisiana, in the United States. The 4.78-mile (7.69 km) bridge was the longest concrete bridge in the world upon completion. It is 35 feet (11 m) wide and has two bascule-type draw spans for passing vessels and barges.