It joins Plaça Espanya , in the Sants-Montjuïc district of Barcelona with metropolitan area municipalities of L'Hospitalet de Llobregat , Cornellà de Llobregat and Sant Boi de Llobregat .
It joins Plaça Espanya , in the Sants-Montjuïc district of Barcelona with the metropolitan area cities of L'Hospitalet de Llobregat , Cornellà de Llobregat and Sant Boi .