 Between Clínico station and the Andalucía Tech terminus, it runs on the surface, which includes some at-grade intersections.Line 2 runs entirely underground, from the city centre to the Jose Maria Martin Carpena Arena.An extension of Line 1 from El Perchel further into the city centre with two underground stops, Guadalmedina and Atarazanas, is under construction and due to open at the earliest in 2022.