The 4.5-kilometre underground section has four new stations, which have been baptized with the names of La Almudena, Alsacia, Avenida de Guadalajara and Las Rosas.
More than 65,000 people will benefit from the new section.
The run begins in the Bilbao district, where the first station is located, to facilitate access to La Almudena Cemetery. From there the tunnel continues beneath calle Nicolás Salmerón to the second station, travels along Avenida de Guadalajara to the third station at the intersection with Avenida de Canillejas to Vicálvaro and finally crosses the M-40 to reach Paseo de Ginebra, where the fourth station lies.
In November 2008 the first stone of this expansion of the Metro system was laid. Altogether the expansion has required an investment of 315 million euro.
All the stations have 90-metre platforms and are accessible to disabled travellers, so as to guarantee that all citizens, without exceptions, can use the Metro public transport system.
Accordingly, thirteen lifts and 28 escalators have been installed in the new stations, equipped with tactile pavement for the guidance of blind people, benches at hip height for travellers of limited mobility, Braille signage and other, complementary features that increase station accessibility.