Dresdner Verkehrsbetriebe AG (DVB) is the municipal transport company of the city of Dresden in Germany. It is a member of the Verkehrsverbund Oberelbe transport association that manages a common public transport structure for Dresden and its surrounding areas. The DVB operates the Dresden tram network comprising 12 tram lines, with a total line length of approximately 210 kilometres (130 mi) and a total route length of 132.7 kilometres (82.5 mi) (as of 2008), and 28 bus lines, with a total line length of approximately 306 kilometres (190 mi). It is also responsible for two funicular railways and three ferries across the River Elbe.