Metro Tunnel
The Metro Tunnel (sometimes also known as the Melbourne Metro Rail Project or the Metro Rail Capacity Project) is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia. It includes the construction of twin 9-kilometre rail tunnels between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations. The southern portal for the tunnel is to be located to the south of South Yarra station. As a result, the tunnel will connect the Pakenham and Cranbourne lines with the Sunbury line, and allow these lines to bypass Flinders Street station and the City Loop while still stopping in the Melbourne central business district.
Vienna Pre-metro
This tunnel was opened in January 1969 an has a length of 3.4 kilometers. As part of the construction work a historic church, the "Florianikirche", has been demolished. It was planned to convert this pre-metro to a full metro line U5 from "Gumpendorfer Strasse" to St. Marx, but has never been seriously pursued. In 2016, the U5 is constructed in a different part of Vienna.