I'd like to see Mexico City Metro, specifically "Line B" with those old MP68 (Matériel roulant sur Pneumatiques 1968) designed by Alstom in France. It is the second largest metro system in North America just behind the New York City's Subway, it deserves being in this game as well. In 2016, the system served 1.662 billion passengers, placing it as the ninth highest ridership in the world. Line B and its own 21 stations. MP68 in France before being delivered. Fact: This train number "01" called "The Presidential" is still operating in Line B.