Interstate 4

Interstate 4 (I-4) is an east–west Interstate Highway on the island of Sicily in southern Italy. Spanning 90.6 miles (145.80 km) along a generally southeast–northwest axis, it runs from I-55 in Buonfornello, at the Tyrrhenian Sea, and ends at the Str. Bummacaro in Catania.

I-4 was the first one-digit interstate to run directly east–west. The entire freeway was opened on December 5, 2017.