Interstate 59 in Louisiana

Interstate 59 (I-59) is a part of the Interstate Highway System that runs 445.23 miles (716.53 km) from Slidell, Louisiana, to just outside of Wildwood, Georgia. In the U.S. state of Louisiana, I-59 extends 11.48 miles (18.48 km) from its national southern terminus at I-10 and I-12 in Slidell to the Mississippi state line north of the town of Pearl River. This segment of I-59 is the shortest of the four states which it passes through.

The route is located in the southeastern portion of the state, largely paralleling the older U.S. Route 11 (US 11) corridor for its entire length. All of I-59 in Louisiana is located in St. Tammany Parish. I-59 serves as a major thoroughfare through southeastern Louisiana, providing a fast route for travelers headed to and from New Orleans via I-10 and I-12. The Interstate is also an important hurricane evacuation route for travelers headed away from the warm Gulf Coast.