In 2001, the Ministry of Public Works and Transport commissioned a study about the feasibility of constructing a urban rail system in the area.

[2] On 27 March 2023, the system's first expansion was inaugurated, connecting El Perchel station to the historic centre of the city.

These stations were supposed to be built and inaugurated in 2014 along the rest of the system, but were delayed due to the 2008 financial crisis that severely struck the region.

[4] This first expansion resulted in the increase of the metro's daily ridership from 28,000 to 41,000 on its first operating day, and helped the system reach its goal of 18 million users that year.

[2] This new underground section will be 1.8 km (1.1 mi) long, with 3 more stations to be built: Hilera, La Trinidad and Hospital.

[8] An extension of Line 1 from El Perchel further into the city centre with two underground stops, Guadalmedina and Atarazanas, opened on 27 March 2023.