The London Underground, commonly known as the Tube, is the oldest metro system in the world. It opened in 1863 and has since grown to become one of the most extensive systems globally.
Dhoby Ghaut Metro station
Moscow Metro is one of world's busiest metro systems, serving more than seven million passengers daily.
It isn't. It's the second biggest planet in our solar system though (Jupiter is the biggest).
Yes, there is a metro system in the DC area. It is a network that contains over 100 miles of track. It is the second busiest subway in the United States (after New York City's subway system.) The metro system is known as The Washington Metro.
Light Rail System and Metro Transit Bus System Light Rail System and Metro Transit Bus System
In Washington DC the Metro is a light rail system.
The metro is a very sophisticated subway system used in Paris.
It should be capitalized if you are referring to a specific metro system.
The Metro is the local shorthand name for the Washington Metro Area Transit Authority.The Metro system consists of buses, trains, and handicapped transport.In the vernacular most people use the word Metro to refer to the train system and call the buses Metro Buses.See the related link for the Metro's home page.
It is either Tokyo or New York.
Tokyo is the biggest capital city, by metro area. However, there are lots of ways to define "city" or "metro area" which might shift things around. See the related link.