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Autovía A-1
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; ;

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.

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.

Sections

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.

#	From	To	Length	Designation
1	Madrid	Venturada	50.11 km	A-1
2	Venturada	Santo Tomé del Puerto		A-1
3	Santo Tomé del Puerto	Aranda de Duero	106.24 km	A-1
4	Aranda de Duero	Lerma, Burgos	42.91 km	A-1
5	Lerma, Burgos	Burgos	37.41 km	A-1
6	Burgos	Armiñón	87.35 km	N-I
7	Armiñón	Vitoria-Gasteiz	27.16 km	N-I
8	Vitoria-Gasteiz	Altsasu/Alsasua	46.69 km	N-I, A-1^[1]
9	Altsasu/Alsasua	Idiazabal	16.05 km	A-1 ^[2]
10	Idiazabal	Donostia-San Sebastián	45.94 km	N-I
11	Donostia-San Sebastián	Irun	21.58 km	N-I