The Second Avenue subway line opened as part of the New York subway system recently. Though the New York Subway network is vast, it is not the longest in the world. The following is a neat graphic showing the top 10 longest metro networks and also ridership figures:
Click to enlarge
Source: What’s the Nearest Subway Stop?, WSJ, Jan 19, 2017
Three of the top 10 networks shown above are in China.
