The S40 is a regional railway line of the Zurich S-Bahn on the Zürcher Verkehrsverbund, Zurich transportation network, in the cantons of Schwyz, St. Gallen and Zurich.
SOB Flirt of the S40 line crossing the Seedamm at Rapperswil; Holzbrücke Rapperswil-Hurden in the foreground.