Sihltal Zürich Uetliberg Bahn

The Sihltal Zürich Uetliberg Bahn AG (lit.'Sihl ValleyZurichUetliberg Railway') – commonly abbreviated to SZU – is a public transport company and network in the Swiss canton of Zurich. The network comprises the Uetliberg and Sihltal railway lines, operated by S-Bahn services S4 and S10, a cable car and several bus services of Zimmerbergbus.

The SZU is jointly owned by the city of Zurich (32.6%), the municipalities of Adliswil, Langnau am Albis, Horgen, Thalwil and Uitikon (6.8%), the Canton of Zürich (23.8%), the federal government (27.8%), and other parties (9%). It is constituted as an Aktiengesellschaft (AG) or public company.