it is one of the oldest railway stations in catalonia and one of the first stations of barcelona metro network. it is also one of the busiest stations in barcelona and the terminal station in the city of all metro del vallès lines. it is served by rodalies de catalunya suburban lines r1, r3, r4 and regional line r12, tmb-operated barcelona metro lines l1 and l3, fgc-operated barcelona metro lines l6 and l7, and metro del vallès lines s1, s2, s5 and s55.