IR trains operate over the whole length of the line between Zurich and Lucerne every 30 minutes, stopping at Thalwil and Zug, with some stopping at Baar and Rotkreuz as well.
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Planned direct connections to Lucerne from Immensee and to Zurich from Arth-Goldau via Thalwil and Zug—to be partly financed by the Swiss government—were postponed for financial reasons.