The Autopista A1, also known as Autopista Nacional, is a Cuban motorway, partly built, that will link Havana to Guantánamo. It is a toll-free road and its total length will be of about 900 km (560 mi). Along with the Autopista A4, linking Havana to Pinar del Río, it is classified as part of the whole Autopista Nacional route, spanning the length of the island; as the Carretera Central highway.