On 12 February 2016 a new stretch of metro line 9, from Zona Universitària to Barcelona-El Prat Airport, known as L9 Sud came into service. The stretch between Santa Coloma de Gramenet and La Sagrera is now known as L9 Nord.
L9 Sud goes through Barcelona, L’Hospitalet and El Prat de Llobregat. It links the Zona Universitària district with the airport's terminal 1 and serves areas that previously had no metro service. This new stretch adds 20 km (19.6 km) to the current network and 15 new stations, all of which are wheelchair accessible. The complete journey takes 32 minutes and trains run every 7 minutes on weekdays.
Stations on L9 Sud: Zona Universitària, Collblanc, Torrassa, Can Tries/Gornal, Europa/Fira, Fira, Parc Logístic, Mercabarna, Les Moreres, El Prat Estació, Cèntric, Parc Nou, Mas Blau, Aeroport T2 and Aeroport T1.
Camp Nou, La Ribera and Aeroport terminal de càrrega stations will come into service at a later date.
Prior to the opening of the new section, tests were carried out to check aspects such as the electrical and safety installations, the stations, ventilation, energy, communications and automatic doors. Altogether, up to 3,700 protocols were developed over the course of several months. The trains that run on the new line (14) were also tested, and test runs were carried out with and without passengers on board.
The train was put into operation following an opening ceremony , during which local residents were given free tickets for the train's maiden run.