Winterthur railway station
Winterthur is Switzerland's fifth busiest station, and is a major node between Switzerland's largest railway nucleus in Zürich and places in Eastern Switzerland (such as St. Gallen and Schaffhausen), as well as Germany (Munich), and Austria (Vorarlberg). The station is served by trains on Zürich's suburban S-Bahn network, as well as by regional and intercity trains, with most through passenger trains making a stop. It is also connected with Zürich's airport railway station Zürich Flughafen, which can be reached in about 15 minutes about every 8 minutes. Zürich Hauptbahnhof can be reached with up to 16 direct connections per hour and the fastest connection takes only 22 minutes (S12). The station has 9 standard gauge platforms (numbered 1-9).
Zürich Underground Railway
In the 1970s "U-Bahn" project, the first line would have led from Dietikon via Schlieren, Zürich main station, Oerlikon and Opfikon to Zürich airport, including two short branch lines to Schwamendingen and Kloten. The two most important development axes of the agglomeration, Limmattal and Glatttal, would have been joined onto the network. The line would have been 27.5 km long, 14.8 km of which would have been underground. At a later point in time the construction of two more lines was planned. In spite of initial optimism the project was rejected in a referendum by the voters in the Canton of Zürich. Some parts of the lines, which had been built as preliminary work for the Underground that was never realised, are used today as the Milchbuck-Schwamendingen tram tunnel and as the terminus of the Sihltal-Zürich-Uetliberg-Bahn.