James.+Mass+transport+systems.

=Metro= ===OVERVIEW===

The [|metro](subway), is a rapid rail mass transport sytem. First used in London in 1863, this light rail system is used throught the world. "Rapid transit is used in metropolitan areas to transport large numbers of people at high frequency". The metro is an environmentally friendly way to tansport large amounts of people. The metro can be used in conjunction with buses to help facilitate the quick transport of many people. Many metros operate at a financial loss, and thus rely on advertisments, fare revenue, and government subsidies inorder to stay in buisness.

=== ROUTES===

Almost all metros use several lines, or routes, to get passengers to different destinations. These are accessed via stations. These stations are the stopping off points for the metro trains were passengers can embark and disembark onto and off of the train. The more stations a system has, the more passengers it has to carry, and thus the length of the train cars has to increase. Most small systems use 3 or 4 cars per train, but larger systems, like the New York Metro Sytem or Paris Metro system, may require up to 12 cars per train.

POWER AND INFRASTUCTURE
Most metro trains are powered by electricty provided by an electrified [|third rail] and use regular steel train tracks to move on. Overhead wires can also be used, but are unsightly. Most metro tains nowadays have only a few crew members, and some metro systems don't even use drivers at all, because everything is automated.

WHERE IS IT USED?
Almost every major city in the world has a metro system, or a variant of it. Cities include, [|London], Toronto, [|Washington D.C.], Beijing, [|New York City], Paris, [|Tokyo], and St. Petersburg in Russia. Tokyo has the busiest system in the world, with an estimated 7 million passengers __per day__! = =

THE END
Really, this is the end.