Interstate 55 (I-55) is a major Interstate Highway in the central United States. As with most interstates that end in a five, it is a major cross-country, north–south route, connecting the Gulf of Mexico to the Great Lakes. The highway travels from LaPlace, Louisiana to Chicago, Illinois. The major cities that I-55 connects to are (from south to north) New Orleans, Jackson, Mississippi, Memphis, St. Louis, and Chicago. The total highway is more then 1550 km (964 miles).