The Frankfurt tram has a system length of almost 70 kilometres. In addition, there is a second system, called Underground, even if it mostly runs aboveground and often tramway-like outside the inner city. It has a network of about 65 kilometers. Both are operated by → VGF (Verkehrsgesellschaft Frankfurt)
At the Frankfurt Airport, there also is an automatic so-called PeopleMover, called "SkyLine" by the operator, which is also a tram by law and was opened in 1994. The PeopleMover is free of charge and also open for visitors.