The government on Barcelona, Spain, has commissioned feasibility studies to develop a new tram line along the "Diagonal", Barcelona's main street, between the existing tram concessions Trambaix and Trambesà²s.

Feasibility studies for the project will be carried out by Barcelona d'Infraestructures Municipals, SA (BIMSA), a municipal company linked to Barcelona City Council. The firm will develop a total of 12 studies to analyze the feasibility of the new tram line. According to sources, the public agency will hire advisors for those analyses for which does not have the necessary expertise.

Barcelona has currently two free-standing systems, Trambaix, which serves the south metropolitan area and Trambesà²s which serves the north. There are multiple interchanges with other modes such as Glà²ries and Cornellà  Centre.

TramMet, a Spanish - French team led by Alstom, FCC, Comsa and Acciona won in 2000 a 25-year build and operate contract for Trambaix and later the contract to build and operate Trambesà²s.

In July 2014, Globalvia completed the acquisition of the 11.78% and 12.88% shares owned by Acciona in the companies that operate the two tram lines. In September 2013, we reported that Globalvia closed the acquisition of a 30% stake in both companies from FCC and Comsa.

Thanks to these operation, Globalvia extended its participation to control 42.44% and 43.05% of these companies.

The Baix Llobregat line runs along Avenida Diagonal passing through S. Feliú de Llobregat to Cornellà . The system has an infrastructure of 29 stops, 3 interchange stations with Metro and 1 with Renfe (railway), and a total length of 15.1 km. The second tram network in Barcelona, Tramvia Metropolità  del Besà²s, links the north-eastern part of Barcelona with the neighbouring cities of Sant Adrià  de Besà²s and Badalona.

The first phase came into operation in May 2004 and the complete system in 2008. The annual number of passengers on both lines is more than 24 million.