to run between the western and northern lines without bypassing the central station. This route was known as Durchmesserlinie Zürich, and was for use of both long-distance and S-Bahn trains. The project also included a third set of underground platforms under Zürich Hauptbahnhof, a new elevated route through the western approaches and two extra platforms at Oerlikon. Breakthrough of the new Weinberg Tunnel was achieved in November 2010, and it was opened to traffic on the 14 June 2014. On the same date, the new platforms, also known as the Löwenstrasse station, were opened. Whilst the other works are still outstanding and expected to be completed in 2015, the partial completion resulted in significant changes to the Zürich S-Bahn. These changes included the diversion of lines S2, S8 and S14 through the Weinberg Tunnel. These lines previously ran via Zürich Wipkingen station, and in order to prevent that station losing service, S24 was extended from Zürich Hauptbahnhof station via Wipkingen to Zürich Oerlikon station. At the same time, the former Glarner Sprinter, a two-hourly train service from Zürich Hauptbahnhof to Linthal, was replaced with a new hourly S-Bahn service, the S25. These major changes resulted in a number of other changes, with service to various stations being provided by different lines. Operation Current services 32 services comprise the Zürich S-Bahn network. The lines are numbered (2‒21, 23‒26, 29‒30, 33, 35‒36, 40‒42) using the prefix "S", which is typical for S-Bahn systems. With the exception of lines S13, S17, S18, S26, S29, S30, S33, S35, S36, S40, and S41, all routes run through or terminate at Zurich mainstation. The S27 service between and , operated by SOB during peak-hours, is neither part of the Zürich S-Bahn nor the St. Gallen S-Bahn network. Unless noted otherwise, all services operate every 30 minutes throughout the day and follow a strict, regular timetable. This is known in the German speaking world as a Taktfahrplan, or clock-face scheduling in English. There may be additional trains during peak periods, and a reduced frequency in the evenings and/or at weekends. Timely connecting services often exist at junction stations. Nighttime services During weekends, in the night from Friday to Saturday and from Saturday to Sunday, there are nighttime S-Bahn services (designated SN followed by the route number) and nighttime bus services (designated N followed by the line number). Nighttime services operate from 1 o'clock until the early morning