Verkehrsbetriebe Zürich (VBZ) is a public transport operator in the Swiss city of Zürich, and is wholly owned by the city. Previously known as the Städtische Strassenbahn Zürich (StStZ), the organisation was founded in 1896 and adopted its current name in 1950.

The Glattalbahn, originally known as the Stadtbahn Glattal, was a project that was ultimately successful in introducing a modern rapid-transit system to the Glattal area of Switzerland, to the north of the city of Zürich. Stadtbahn Glattal was developed as a metre gauge tram system with through-running to neighbouring Zürich. It was built and is owned by the Verkehrsbetriebe Glattal (VBG), but is operated under contract to them by the Verkehrsbetriebe Zürich (VBZ).