The given table provides information about the underground railway systems in six cities. Overall, the first railway system that was opened from the table was from London, which was also the longest route being put at 394 kilometers. Additionally, railway system from Tokyo demonstrated the highest number of passengers per year, standing at 1927 millions people per year.
In terms of dates opened, railway systems from London, Paris, and Tokyo were the earliest ones built being opened at 1863, 1900, 1927, respectively, whereas railway systems from Washington DC, Kyoto, Los Angeles were the newest railway systems opened in 1975, 1981, 2001, respectively.
Regarding kilometers of routes, Paris, Tokyo, and Washington DC were roughly 120-200 kilometers in length where Paris is lengthiest one. Furthermore, Kyoto and Los Angeles were the shortest routes opened Kyoto being 11 kilometers and Los Angeles 28 kilometers.
On the subject of passengers per year, London had 775 million passengers per year, despite it being the longest one. Furthermore, Paris had around 1200 passengers per year, which is still a staggering difference between Paris and Tokyo. Furthermore, Washington DC, Kyoto, and Los Angeles had solely 144 million, 45 million, 50 million passengers per year, respectively.