The Autopista AP-8 is a toll autopista in the north of Spain, crossing the Basque Country from east to west. It is known as the Autopista del Cantábrico and connects the French border with Bilbao via San Sebastián, Zarautz, Eibar and Durango. At Bilbao the AP-8 continues as the toll-free Autovía A-8, which runs along the Spanish northern coast to Gijón and eventually the region of Galicia.

The Spanish motorway (highway) network is the third largest in the world, by length. As of 2019, there are 17,228 km (10,705 mi) of High Capacity Roads in the country. There are two main types of such roads, autopistas and autovías, which differed in the strictness of the standards they are held to.