The Sihltal Zürich Uetliberg Bahn SZU is a regional transport company. The company operates the Sihltalbahn (S4) from Zürich HB to Sihlwald, the Uetlibergbahn (S10) from Zürich HB to Uetliberg and the cable car Adliswil–Felsenegg LAF. It is also responsible for organising the bus services in the «Zimmerberg» area. SZU employs around 160 people.