When New Orleans expanded in the 1940s and 1950s, access to the north of the city became a problem. For people heading north from the city, or traveling south towards New Orleans, one major obstacle had to be circumvented: Lake Pontchartrain.

It was a time-consuming process to head east or west around the lake, so plans were made to create a direct connection across the center of the lake to its northern shore. In 1955, the Louisiana Bridge Company was created to undertake the construction project. It took just 14 months to build the first two-lane span of the causeway, which opened in 1956 with a total length of 23.86 miles.

It is such a long bridge that motorists lose sight of land for an eight-mile stretch, and drivers have been known to freeze out of some kind of false seaborne fear, at which point the police have escorted them off the bridge. Babies have been born on the causeway when their mothers failed to make it to the hospital on the other side. And an airplane once ran out of gas over the lake, eventually landing safely on the bridge.