Line 9 ( `` Línia 9 '' in Catalan ) is a line of the Barcelona Metro network that is currently under construction , with five stations open in the Santa Coloma de Gramenet suburb since December 2009 .
Line 9 ( Línia 9 in Catalan ) is the newest line in the Barcelona Metro network , currently under construction , with only five complete stations , all in Santa Coloma de Gramenet . These first five stations opened on 13 December 2009 .