The table illustrates the underground systems of six different cities.
Overall, kilometres of route in one city is directly proportional with its opening date; except for Kyoto has a longer route than LA despite of the sooner opening date. Besides, Tokyo railway system has the largest number of passengers yearly, while Kyoto has the lowest figure.
On the one hand, London, Paris and Tokyo are the top three cities in all criterias. Specifically, London has the oldest underground system, which was opened in 1863, followed by Paris in 1900 and Tokyo in 1927. As a result, London has travelled the longest distance for 394 kilometres, which is sustantially longer than Paris’ 199 kilometres and Tokyo 155 kilometres. In contrast, Tokyo attacts the highest amount of passengers for 1927 millions people; Paris and London attacts 1191 and 775 millions people, respectively.
Considering the remaining cities, Washington DC has become operational since 1976 and travelled for 126 kilometres of route. Kyoto and LA started running its railway systems in 1981 and 2001 and has 11 and 28 kilometres of route, in order. Considering the number of passengers yearly (in millions), while washington DC has 144 millions travellers per year, Kyoto and LA have an identical amount of a third of Washington DC’s figure.