The following table compares metro systems in different cities, with regard to the number of lines, the total lengths, number of yearly journeys, and the price of each ticket.
Of all the cities, the lowest number of railway lines is in the London Tube, Mexico City Metro, and the Tokyo Subway, at 11, 12, and 13 lines, respectively. Despite the number of journeys in the London metro being the lowest, at 1.2 billion, the cost of its ticket is nearly seven times that of Mexico and almost five times that of Tokyo. Additionally, similar to its high price, it is the London Tube that has the longest total length of railway lines of these three cities.
Regarding the other systems, the New York City Subway’s railroads are the longest, at 659 miles, which is almost double that of Beijing. Similary, the metro system of New York possess the largest overall number of railroads, with Beijing coming in a close second, yet the annual journeys of the former are almost half that of the latter. Conversely, Mexico city Metro harbors only 12 raillines, and its tickets are as low as that of Beijing, at 0.23$ and 0.45$, respectively.
Overall, all the metro systems are different regarding their ticket prices, number and length of railways, and the number of annual journeys. Also, there is no correlation between any of these aspects.