2. Shanghai Metro, China
China has made the list once again. This time, it’s their Shanghai Metro station that’s breaking records as one of the busiest metros in the world. This system is considered relatively new after being constructed in 1993. But since then, it has become the primary method of transportation for many of the residents in this populous city. It’s 15 lines and 389 stations delivered 3.6 billion rides in 2016 alone.