SBB to double-track the Uster–Aathal line

SBB is converting the 3.5 km single-track line between Uster and Aathal to double track (including signal upgrades, a new rail-technology building, bridges and an underpass at Winterthurerstrasse) to enable a 15-minute base service Zürich HB–Uster–Wetzikon on the Zurich S-Bahn. The plan approval procedure has been running since summer 2025 (public display until end of September 2025); barring appeals, construction could start in the second half of the 2020s with an estimated build time of about 4 years. Investment cost is approx. CHF 150 million, financed via the Swiss Rail Infrastructure Fund (BIF).