Sihltal Zürich Uetliberg Bahn

The Sihltal Zürich Uetliberg Bahn AG – commonly abbreviated to SZU – is a railway company and transport network in the canton of Zürich in Switzerland. The network comprises the Uetliberg railway line and the Sihltal railway line, a cable car and a network of bus services.

The SZU is jointly owned by the city of Zürich (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.

The history of the SZU dates back to two separate companies, which built the two railways that now make up the SZU. The first of these companies was the Uetlibergbahn-Gesellschaft, which opened its line from Bahnhof Selnau in Zurich to the summit of the Uetliberg mountain in 1875. This was followed in 1892 by the Sihltalbahn company (SITB), which opened a line from Bahnhof Selnau to Sihlwald. In 1897 this latter line was extended to Sihlbrugg and a connection with the Thalwil to Zug line of the Swiss Northeastern Railway (NOB).

In 1920, the Uetlibergbahn-Gesellschaft became bankrupt and was liquidated. Two years later the Uetlibergbahn was taken over by the Bahngesellschaft Zürich–Uetliberg (BZUe). In 1923 the Uetlibergbahn was electrified using the direct current system, whilst the following year the Sihltalbahn was electrified using alternating current.

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