ground-level conductor Wolverhampton Corporation Tramways, England (stud contact) (1902–1921) Bordeaux Tramway, France (conductor rail) Sydney Light Rail (tramway) DC, two-wire Greenwich, England. Previously used by trams when in the vicinity of Greenwich Observatory; separate from trolleybus supply. Cincinnati, Ohio, US. Tram (streetcar) system used this arrangement throughout, probably due to legal constraints on ground return currents. Havana and Guanabacoa, Cuba. Tram (streetcar) systems in both cities used this arrangement. Lisbon, Portugal. Elevador da Bica, Elevador da Glória and Elevador da Lavra. DC, power from running rails Gross-Lichterfelde Tramway (1881–1893), 180 V Ungerer Tramway (1886–1895) transportable railways as a ride for children DC, four-rail See also Third rail Railway electrification system Railroad electrification in the United States Ground level power supply Conduit current collection Current collector Amtrak's 25 Hz traction power system List of tram systems by gauge and electrification Traction current pylon Footnotes References External links Electrification systems, track gauges and electrified track lengths in selected countries (in German) Map of European voltage systems Southern Electric, England—details of 3rd rail electrification Electric rail traction Rail Electric rail transport