thanks to Patrick Leung, who asserts "The KCRC is a system of suburban trains that integrates with the MTR (city subway) to form one of the most efficient transit systems in the world.")

subway systems of the world, presented on the same scale ... * These are not all of the world's subway systems. ... Beijing; Beijing Subway

An interesting look at the worlds subway systems - Great to compare them. Which is the biggest? ... however, both NYC and barcelona have wicked nice subway systems that get all across their cities.

On top of that, these subway systems have been around so long that virtually no one can remember a time when they didn't exist.

At first glance, a subway is simple -- it's a train that runs through a tunnel. Learn about the subway systems that riders can't always see. ... The subway in Copenhagen, ... In such automated systems,

1999/2009 © This site is maintained and constantly updated by Robert Schwandl...

Singapore is about 650 km^2 while Chicago is 600 km^2. Look at the corresponding subways. (Unless of course that the Chicago subway only occupies the downtown area).

More on World's Largest Subway Systems from Infoplease: ... Related content from HighBeam Research on: World's Largest Subway Systems

Source: Jane's Urban Transport Systems, 2002–2003 edition, and individual subway websites.

Describes a subway concept called ... It is designed to interface with local transit systems, and the tunnel complex also contains utility transmission and auxiliary freight-carrying systems.