The Line 9 is a Barcelona Metro service and an underground railway project, which includes other services (L9/L10), in Barcelona metropolitan area.
Currently with 12 stations in 11.1 km (L9N and L10) serving Badalona, Santa Coloma de Gramenet and the Barcelona neighbourhoods of El Bon Pastor and La Sagrera; and L9S with 15 stations in 19,6 km connecting the El Prat Airport and Zona Universitària in Barcelona.
This underground railway project includes two branches of the Line 10. The total system (L9/L10) will have a length of 47.8 km. It will connect strategic logistics centres, areas of facilities and service such as the Barcelona Airport, Zona Franca (logistics and industrial area), Fira de Barcelona (Barcelona’s trade fair area), the expansion of the Port, the city of Justice, Park Güell, Camp Nou, the Basketball city; as well as service to neighbourhoods that do not have subway (Bon Pastor, Llefià, La Salut, Singuerlín, Pedralbes and Zona Franca), linking five municipalities: Santa Coloma de Gramenet, Badalona, Barcelona, L’Hospitalet de Llobregat and El Prat de Llobregat.
In 2009 was launched the first service between Can Zam and Can Peixauet (L9) and in 2010 between Bon Pastor and Gorg (L10) in Badalona. In 2016 the airport branch was put into service.