The table provides data on the underground rail networks in six different cities, including the year of beginning operation, the length of route and the annual passengers.
Overall, it is evident that the three oldest underground systems, such as those in London, Paris and Tokyo, have larger and serve significantly more passengers compared to the relatively newer systems in Washington DC, Kyoto, and Los Angeles.
London, the oldest system established in 1863. At once, is is also the largest size with 394 kilometers. Following London, the second system is Paris, opened in 1900, has route length of 199 kilometers but serves more passengers annually than London. While in terms of the length of route, Tokyo with 155 kilometers, being the highest number of people used at 1927 million per year.
With three cities who is quite new systems, Washington DC, operated in 1976, has the longest route at 126 kilometers and serves the most significant number of passengers, surpassing Kyoto and Los Angeles, with 45 million and 50 million people who use the underground system each year respectively. Despite having a shorter route length compared to Kyoto, indicating higher usage of its underground network.