Changes in land use, particularly the new areas in the Docklands area, caused the project to change considerably in the 1990s. The Jubilee Line Extension, opened in three stages in 1999, split from the existing line at Green Park, creating a one-station branch to Charing Cross, which is now closed (although it is still sometimes opened for occasional use as a film set). With the extension, the Jubilee Line is the only line on the London Underground network that crosses all other lines.