The table compares underground railway systems in six cities, focusing on the year they opened, the length of their routes, and the number of passengers they carry annually.
Overall, older systems tend to be larger and more heavily used than newer ones. London Underground is the oldest network and has the longest route, while Tokyo Metro carries the highest number of passengers.
London, which opened in 1863, has a total route length of 394 kilometres and serves 775 million passengers per year. In comparison, Paris Métro, opened in 1900, has a shorter network of 199 kilometres but a higher passenger number of 1,191 million.
Tokyo, opened in 1927, carries the most passengers at 1,927 million, despite having only 155 kilometres of track. On the other hand, newer systems such as Washington Metro and Los Angeles Metro Rail have shorter routes and significantly lower passenger figures.
