The table below gives information about the underground railway systems in six cities

The table compares the underground train systems in six major cities.

Overall, the three oldest systems, in london, Paris and tokyo, have the longer routes and have more passengers per year than the three newer systems left.

Of the systems in six cities, london's is the oldest, having opened in 1863. it is largest system as well, with 394 kilometres of route. The second oldest is Paris's system, is about half the size of the london underground, with 199 kilometres of the route. By contrast, it serves more people per year. while tokyo is the third oldest system, is the most used, with 1927 million passengers per year.

In the newest systems left, include washington dc, kyoto and los angeles, was established in 1976, 1981 and 2001. washington dc's system is far longest routes and the most used, with 126 kilometres of routes and 144 million passengers per year than kyoto and los angeles. Meanwhile, the shortest network is kyoto, with 11 kilometres of routes. it is also smallest and serves 45 million passengers each year. it is lower than the newest system is los angeles, serving 50 million passengers per year.