Interstate 24 (I-24) is an Interstate Highway in the Eastern United States. It runs diagonally from I-57, 10 miles (16 km) south of Marion, Illinois, to Chattanooga, Tennessee, at I-75. As an even-numbered Interstate, it is signed as an east–west route, though the route follows a more southeast–northwest routing, passing through Paducah, Kentucky and Nashville, Tennessee. Because the routing of I-24 is diagonal, the numbering is a bit unusual as it does not completely follow the Interstate Highway System numbering conventions.
I-24 constitutes the majority of a high-traffic corridor between St. Louis, Missouri, and Atlanta, Georgia. This corridor utilizes I-64 and I-57 northwest of I-24, and I-75 southeast of I-24.
The I-24 highway goes through the states of Illinois, Kentucky, Tennessee, and Georgia.