Moscow Metro

S1 E6: It is one of the biggest and busiest metro systems in the world: The Moscow Metro. During rush hour the trains are running every 90 seconds to transport around 9 million people daily - that makes 2.3 billion a year. Which means: it is the busiest metro outside of Asia. Nevertheless, the trains are at 99,9 % on time - world record for the most punctual metro system!