The table provides data on the subway systems of a total of six major cities in four different countries.
From the figures, it can be seen that the three cities London, Paris and Tokyo have the oldest underground systems, while the other three cities Washing DC, Kyoto and Los Angeles have metro systems that were built much more recently. Also, regardless of size, the ones carrying the highest number of passengers per kilometer of track are the two Japanese systems: Tokyo and Kyoto.
The London Underground is by far the oldest, being built in 1863 – almost half a century before the next one opened in Paris, followed by Tokyo’s, which was completed almost three decades after Paris’s. These three carry much higher numbers of passengers than the more recently-built metro systems in the other three cities. Out of the three, Tokyo’s has the highest outright number of passengers at 1,191 passengers per year and the lowest length of track (155km of route) making it the most densely populated.
Washing DC’s underground railway system was opened in 1976; Kyoto’s, five years later; Los Angeles’s, another twenty years after that. Each city carries far fewer passengers per year than the previously mentioned cities. However, Kyoto’s metro, despite having the lowest track length of these three systems (only 11km), has the highest proportion of passengers per length of track, making it the second busiest after Tokyo’s.