The S14 is a railway service of the St. Gallen S-Bahn that provides half-hourly service between , in the Swiss canton of Thurgau, and in southern Germany. The line is also part of the Bodensee S-Bahn. THURBO, a joint venture of Swiss Federal Railways and the canton of Thurgau, operates the service.
The S14 operates every 30 minutes between and , except on Sundays when it operates hourly. In Konstanz, an hourly connection is made with a RegioExpress service to and from and . The hourly âÂÂKonstanz InterRegio 75 supplements the S14. An additional S14 operates an hourly shuttle service between Konstanz and ; this, with the regular S14 service and the IR 75, creates a 15-minute frequency between the two cities.
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The December 2013 timetable change applied the S14 designation to an existing half-hourly service between Weinfelden and Konstanz.