The future underground station La Estación Pasante Subterranea, will allow to operate the UIC tunnel that connects Atocha with Chamartin station. This connection will allow high-speed trains from the North of Spain to reach the South of the country without the need for passengers to make transfers.

Both Atocha and Chamartin station are going to be extended to increase its capacity. The future Atocha and Chamartín stations will function as single railway macro-infrastructure designed to promote high speed. “One station, two terminals”