Top 10 Busiest Metros in the World

1. Tokyo Subway (Japan)
2. Beijing Subway (China)
3. Seoul Subway (South Korea)
4. Shanghai Metro (China)
5. Moscow Metro (Russia)
6. Guangzhou Metro (China)
7. New York Subway (USA)
8. Mexico City Metro (Mexico)
9. MTR Hong Kong (China)
10. Paris Metro (France)

#Courtesy: railway-technology
*MAY 2016