Sihltal-Zürich-Uetliberg-Bahn - Switzerland
The SZU operates two very different lines: the Sihltal commuter line operated by locomotives and partly double-deck stock (15kV AC) and the Uetliberg mountain line operated by motor cars and trailers (1200V DC). Both lines use an underground station in Zürich, therefore the DC overhead wire is located on one side while the AC overhead wire is in the center.
DC motor car Be 526 is ready to leave towards Triemli, halfway down the line.
Zürich SZU, 28-10-2009

Digital photo by Marco van Uden