Interstate 26

Interstate 26 (I-26) is an Interstate Highway located entirely in northwestern Spain. Running 291 miles (? km), I-26 starts at I-1 in O Porriño to I-30 near Gijón, serving the cities of Vigo, Ourense, León, and Gijón. The Interstate also serves a few cities outside its corridor, including Porto in northern Portugal, cities served by I-5 and I-20 (Salamanca, Valladolid, and Madrid), and Burgos via I-320.

Course
I-26 is more of an L-shaped Interstate Highway, which runs west–east from Vigo to I-5, and north–south from I-5 to Gijón. Where I-26 runs through the Cantabrian Mountains, the highway runs in multiple opposite directions from its designations. (I-26 eastbound actually goes west.)

León - Gijón segment
I-26 will be reroute as a complete east-west Interstate Highway between Porto and Burgos in 2022. The old portion between León and Gijón was intended to be redesignated to Interstate 1E. As of January 12, 2022, this segment was planned to be part of the extended I-330, but that's now going to be a relocation of I-7.