Phase 4 of expanding the S-Bahn network approved in Switzerland December 7, 2009 | Europe News Switzerland transport company SBB has approved Phase 4 of the expansion for the S-Bahn network in the Zürich traffic area, Zürcher Verkehrsverbund (ZVV), covering the entire canton of Zü... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password