in 2003, work began on the extension of the line by about to via pavese, with the consequent shifting of line 13's san ruffillo terminus from ponte savena to via pavese, and the construction of a new electrical substation at via pavese to provide power for the extension. the work was completed during the first half of 2007, and the extension was opened for service on 13 september 2007, to coincide with the introduction of the new winter schedule.