The table below gives information about the underground railway systems in six cities.

The table provides data about the year of establishment, length, and number of users of the underground railway systems in six big

cities

in the world.

Firstly

, in Europe are located the oldest and the longest metro among the presented. In London, which was opened in 1863, the longest railway accounts for 394 kilometres of route,

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by Paris with around a half compared to London’s duration, 199 kilometres only. The shortest metro is in

Kyoto

, Japan,

however

the youngest railway system is in Los Angeles, US, and it is almost 2.5 times longer compared to

Kyoto

, albeit has a similar capacity. Interestingly, in terms of

passengers

per year accumulated amount of total European

cities

is approximately equal to the total Japanese

cities

,

however

, there is a disproportion among the

cities

. Tokyo serves the biggest amount of

passengers

, 1927 million a year,

while

another Japanese city,

Kyoto

presents the smallest amount of 45 million only,

whereas

Paris is

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the

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second place and London on

the

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third one with 1191 and 775 million

passengers

respectively.

Lastly

, Washington DC, is the only city that consistently holds

the

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fourth place in all the categories.

Overall

, there is a correlation between the date of opening and length, with the small exception of

Kyoto

,

however

, there is no connection between the size of the subways and the number of

passengers

who use

this

infrastructure.