| Country: | ESP |
| Type: | N |
| Route: | 1 |
| Map Custom: | yes |
| Length Km: | 112.31 |
| Length Ref: | [1] |
| Terminus A: | Madrid |
| Junction: | Aranda de Duero, Burgos, Miranda de Ebro, Vitoria-Gasteiz, San Sebastián |
| Terminus B: | Irun |
The N-1 (formerly designated as N-I) was the main road from Madrid to France in Spain. From Madrid, the road headed north to Burgos. In this section, most of the old N-I has been replaced by the Autovía A-1. From Burgos to Miranda de Ebro the N-1 still exists, running parallel to the (formerly tolled) Autopista AP-1.[2]
In Álava, the former N-I has been redesignated. Current roads using the alignment of the former N-I include the [3] and,[4] the western and eastern access roads to Vitoria-Gasteiz. In the province of Gipuzkoa, the road is still signed as N-I despite being an autovía.[5] The N-I in Gipuzkoa is tolled for heavy goods vehicles.[6]