The table shows data about underground railway systems in six major cities with date open, km of routes, and passagers numbers per year in millions.

The table illustrates the underground railway operation in the six biggest cities, including the

opened

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opening

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date,

kilometers

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kilometres

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of route, and

passengers

per year.

Overall

, it can be seen that the oldest railway systems are the longest ones,

in contrast

with the youngest routes that present the smaller routes. London opened first (1863) and is nearly twice as expansive (394

kilometers

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kilometres

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) as the second largest subway, in Paris, which opened in 1900 and is 199

kilometers

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kilometres

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long.

However

, Paris now has more

passengers

compared to London (1,191,000,000 to 775,000,000). 3. Tokyo was the next oldest, having been constructed in 1927 with routes measuring a total of 155

kilometers

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kilometres

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and being made use of by 1,928,000,000

passengers

annually. The more modern subways are Washington, D.C. (1976), Kyoto (1981), and Los Angeles (2001). Washington is the largest of the 3 at 126

kilometers

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kilometres

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with 144,000,000 yearly

passengers

. 3. Kyoto is by far the smallest (11

kilometers

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kilometres

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) and serves relatively few individuals (45 million).

Similarly

, the Los Angeles subway is 18

kilometers

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kilometres

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in cumulative length, and only 50,000,000 people travel on it each year.