TheZimmerbergbus is abus network in theHorgen District inSwitzerland, operated by theSihltal Zürich Uetliberg Bahn (SZU) and its local partner firms:AHW Busbetriebe AG inHorgen,Busbetriebe Bamert GmbH inWollerau,Leuthold Transfer AG in Horgen, andPostAuto Schweiz AG Region Zürich. The network is named after theZimmerberg.
The Sihltal Zürich Uetliberg Bahn AG provides withinZürcher Verkehrsverbund (ZVV) a network of 166.5 km (103.5 mi) including 201 stops. The network connects theZimmerberg region and parts of theSihl Valley which includes the municipalitiesAdliswil,Hirzel,Horgen,Hütten,Langnau am Albis,Oberrieden,Richterswil-Samstagern,Schönenberg,Thalwil andWädenswil.[1] Bus connections within the municipalitiesKilchberg andRüschlikon are provided by theVerkehrsbetriebe Zürich (VBZ).
As of January 2014 the fleet consisted of 40+ vehicles[citation needed]