The table compares data about underground railway systems across three columns: the year opened, kilometers of route, and passengers per year in six major cities.
Overall, it is clear that London was the first city to introduce an underground train system and also boasts the longest rail network. In contrast, Kyoto has the shortest route. Additionally, the highest number of passengers using the system is in Tokyo, followed closely by Paris.
Looking at the table in more detail, the trains in London, which opened in 1863, were the earliest of all the cities listed and feature the longest railway lines at 394 kilometers. Paris has the second longest railway with 199 kilometers of track and a significant number of passengers, totaling 1.191 million, ranking second only to Tokyo. Tokyo leads worldwide with 1.927 million passengers per year.
The remaining three cities, Washington D.C., Kyoto, and Los Angeles, have fewer travelers annually due to their shorter routes, and all three had their systems opened after 1975.