Autopista A3 (Cuba)
The Autopista A3, also known as Autopista Havana-Melena, is a Cuban motorway linking Havana to Melena del Sur. It is a toll-free road and has a length of. Although it's a part of the Cuban motorway system, it only has one official interchange with the San José de las Lajas-Bejucal Road, and an unofficial unpaved interchange with the Calle 100 of Havana, with the rest of the junctions being at-grade. It also turns into an undivided 2 lane highway after the junction with the Road of Batabano.
Route
The A3 is a dual carriageway with 4 lanes and has some at-grade intersections with rural roads. It starts in Havana, from an interchange of the Havana Beltway (A2), and continues through Mayabeque Province; crossing the western side of the municipality of San José de las Lajas, and ending on a provincial highway, 2 km west of Melena del Sur.| Exit | ↓km↓ | Province | Note |
| 0.0 | Havana | At-grade intersection | |
| Calle 100 | Havana | Unpaved interchange | |
| Las Guásimas | 5.8 | Havana | At-grade intersection |
| Managua | 10.2 | Havana | At-grade intersection |
| Nazareno | 16.8 | Mayabeque | |
| San Antonio de las Vegas | 20.0 | Mayabeque | At-grade intersection; End of divided section |
| La Ruda-San Antonio de las Vegas | 26.0 | Mayabeque | At-grade intersection |
| Guara-Marañón | 27.7 | Mayabeque | At-grade intersection |
| Melena del Sur | 32.5 | Mayabeque | At-grade intersection |