Underground extension linking Alameda de Osuna to Madrid-Barajas Airport terminals T1-T2-T3 through a 1,747 m tunnel. Features double electrified tracks and a terminal station with a large glazed roof ACS Group · Acciona · News
Madrid Metro Line 5 Extension (to Airport T1-T2-T3) is a metro project in Spain, currently under construction.
Greenfield new corridor: new metro extension on new underground alignment.
Construction began in 2024, with completion expected in 2028.
The project has an estimated investment of €181M.