It is the result of merging several sections of previously existing roads, autopistas and autovías after the 2004's renaming of primary highways managed by the Generalitat de Catalunya.

It starts at the intersection with the N-340 at El Vendrell and runs parallel to the Mediterranean Sea coastline passing through several coastal towns such as Calafell, Cubelles (Charlie Rivel's birth town), Vilanova i la Geltrú and Sitges, and across the Garraf Massif coast it finishes at Castelldefels.

It starts at Barcelona's Plaça de les Glòries and runs parallel to the coastline passing through the city of Badalona and finishing at the intersection with the B-20 and the C-32, at Montgat.

This highway section should continue over the actual N-II, at the comarca of Maresme, but since this road is managed by the Spanish government, it has not been renamed yet.

It starts at the end of the Autovia C-65, at Santa Cristina d'Aro and runs parallel to the coastal line (Costa Brava) passing or by-passing the towns of Castell-Platja d'Aro, Palamós, Palafrugell, Pals, Torroella de Montgrí, Verges and Viladamat before ending at Figueres.