The line's short, automated trains provide rapid transit to the historically unconnected neighbourhoods of Torre Baró and Ciutat Meridiana, on the hills of the Nou Barris district.

[3] Most of the line is single-tracked, with a passing loop at Torre Baró | Vallbona, where trains have to wait to cross.

Additional metro lines projected to be built in following years will probably be quite similar to L11, and their colours have been designed using the same convention.

The line was projected to provide Barcelona Metro coverage to the most remote neighbourhoods on the hills of Nou Barris, which have historically been isolated and had poor access to mass transit.

[4] After an agreement to build the line between the Generalitat de Catalunya and neighbourhood associations was signed in 1999, construction started in 2001.