High Quality Content by WIKIPEDIA articles! Interstate 4 (I-4) is a 132.298 miles (212.913 km) intrastate Highway located entirely within the state of Florida, United States. It goes from Interstate 275 in Tampa, Florida (27°57′54″N 82°27′11″W / 27.965°N 82.453°W / 27.965; -82.453) to Interstate 95 at Daytona Beach, Florida (29°09′18″N 81°04′34″W / 29.155°N 81.076°W / 29.155; -81.076). It also has the Florida Department of Transportation designation of State Road 400, but only a small portion of the route is signed at the east end. I-4 is currently the lowest-numbered Interstate Highway within the contiguous 48 U.S. states. The area that surrounds I-4 is often referred to as the I-4 Corridor.