Interstate 80 (I-80) is a part of the Interstate Highway System that runs from San Francisco, California, to Teaneck, New Jersey. I-80 enters Illinois from Iowa in the west, southwest of Rapids City, and runs generally eastward through East Moline, LaSalle, and Joliet, before entering Indiana in Lansing. The Interstate runs for approximately 163.52 miles (263.16 km) through the state.