N-I then runs parallel to AP-1 (toll highway) to Miranda de Ebro. It becomes again A-1 and goes via then goes via Vitoria, Altsasu (Alsasua), Beasain, Tolosa, Donostia and Irun.
N-I travels in parallel to AP-1 (toll highway) up to Miranda de Ebro. It then changes to A-1 and goes through Vitoria, Altsasu (Alsasua), Beasain, Tolosa, Donostia, and Irun.