In December 2001, line 1 was extended to the new district of De Aker, and line 17 replaced line 1 on the route between Osdorpplein and Dijkgraafplein. For a lengthy period, line 24 was diverted via line 16, and line via line 4, during the construction of the De Pijp metro station on Ferdinand Bolstraat. In December 2002, line 6 was diverted to call at Centraal Station in place of Stadionplein, and in November 2003, line 16 was extended from Stadionplein to the VU Medisch Centrum.