High Quality Content by WIKIPEDIA articles! Interstate 359 (I-359) is a part of the Interstate Highway System in the US state of Alabama. It is a spur route that runs for 2.76 miles (4.44 km) entirely within the city limits of Tuscaloosa. Its termini are just south of I-20/I-59 interchange on the south side of town and U.S. Highway 43 (US 43) in downtown Tuscaloosa. The entire length is concurrent with U.S. Highway 11 (US 11) and Alabama State Route 69 (SR 69), with both continuing as at grade thoroughfares north and south of the shorter Interstate.