Metrophile (A person with a devoted interest in these systems) .
External links
UrbanRail.Net (http://www.urbanrail.net) (formerly called metroPlanet) – descriptions of all metro systems in the world, each with a schematic map showing all stations.
Undistorted metro network maps, all at the same scale for comparison (http://www.fakeisthenewreal.org/subway/index.html).
Mind the Gap (http://www.cjvlang.com/Spicks/thegap.html) "Mind the Gap" in Japanese, Cantonese and Mandarin.
Memoirs of a subway musician (http://www.sawlady.com/sawmemo.htm) This musician played in the subway stations of NYC, Paris, Prague & Rome.
nycsubway.org (http://www.nycsubway.org) A comprehensive resource on the New York Subway system.
Metro Bits (http://mic-ro.com/metro/) Various aspects of the world's metros.
The railways are run by CityRail, an agency of the government of New South Wales.
Because the original underground lines were built in conjunction with the construction of the Sydney Harbour Bridge, a decision was made to have the lines in shallow tunnels so as to minimise the height difference between the underground rails and their extension across the bridge.
The third underground line is the Airport Line, which opened in the year 2000, prior to the Sydney Olympics.