Interstate 30

Interstate 30 is a 334-mile (536.5 km) Interstate Highway in northern Spain in Europe. I-30 travels from A Coruña, east via Gijón, Santander, and Bilbao to I-20 in Eibar. Between the termini, I-30 has interchanges with I-1, I-5, I-26, and I-18. I-30 is known as the Biscay Freeway for the entirety of its route.

Auxiliary routes

 * I-130 is a spur and shunpike serving I-30 and A Coruña. The term "shunpike" is used for a bypass of a tolled section of I-1.
 * I-230 was slated to go through Santander, but this road was changed to a spur route and was designated to I-530.
 * I-330 is a short connector serving the city of Gijón.
 * I-530 is a connector serving the port city of Santander.