The provided table offers insights into the underground railway systems across six distinct cities, elucidating their opening year, route length, and annual passenger numbers.
The oldest underground railway system among the cities is in London, inaugurated in 1863. With a route length extending to 394 kilometers, it stands as the lengthiest system. Conversely, the more recent additions to the list, such as Kyoto and Los Angeles, have considerably shorter routes, spanning only 11 and 28 kilometers respectively.
Paris and Tokyo, established in 1900 and 1927 respectively, exhibit relatively shorter route lengths compared to London. However, they boast the highest annual passenger volumes among the cities, with Tokyo leading at 1927 million passengers and Paris following closely at 1191 million.
In contrast, the Washington DC network, with a route length of 126 kilometers, serves a relatively high annual passenger count of 144 million, despite being a more recent addition.
Overall, it is apparent that the age of the underground railway systems correlates with their route length and annual passenger numbers, with older systems in London, Paris, and Tokyo boasting longer routes and higher passenger volumes compared to newer systems in Washington DC, Kyoto, and Los Angeles.