The A-1 (also informally known as Autovía del Norte; Basque: Iparraldeko Autobia) is a Spanish autovía route which starts in Madrid and ends in Irun. It replaced the former national road from Madrid to France, the N-1 road. It carries the designation of European route E05, and, as one of the major north-south arteries of Spain, is one of the country's busiest highways.

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Quick Facts Autovía A-1, Route information ...

Autovía A-1
Autovía del Norte
Route information
Part of E5 / E80
Length	371 km (231 mi)
Major junctions
From	Madrid
To	Irun
Location
Country	Spain
Highway system
Highways in Spain Autopistas and autovías National Roads

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Between Burgos and Armiñón there is a toll alternative for this autovía, the autopista AP-1.

In 2011, work was ongoing to bring the section between Burgos and Madrid up to modern standards.

Autovía A-1 currently has two sections: one between Madrid and Burgos and another between Miranda de Ebro and Alsasua. Traffic through the 49.6 km discontinuity between Burgos and Miranda de Ebro is redirected to the N-I. Beyond Altsasu, traffic continues on the N-I to the French border.

• Madrid
• Aranda de Duero
• Burgos
• Vitoria-Gasteiz
• Donostia
• Irun