As of [作為] October 2019, there are 189 subway systems around the world and 32 more are under construction[6]. Today we’ll take a look at three of these mass transit systems [大眾運輸系統]. Let’s get to know them by comparing some facts and figures they have in common, things like speed, cost, size, and so on. Next, we’ll get to know their personalities. Our first stop is New York City and the New York City subway, also called the MTA.