[1] It is a toll-free road and has a length of 156 km (97 mi).

Along with the Autopista A1 (Autopista Nacional), partly built, that will link Havana to Guantánamo, it is classified as part of the whole Autopista Nacional route, spanning the length of the island; as the Carretera Central highway.

The motorway, connected to the A1 via the Havana Beltway (A2), was opened on December 19, 1989.

The A4 is a dual carriageway with 6 lanes from Havana to Guanajay, 4 lanes from Guanajay to Pinar del Río, and has some at-grade intersections with rural roads.

From Guanajay it is a beltway (Autopista ZEDM) linking the A4 to the Port of Mariel.