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! This is made possible by a sophisticated operating and maintaining system, innovative technique and a perfect match from all departments. Every line of the metro is running completely self-sufficient, on its own system of rails and underground stations. Disruptions on one line do not affect the other ones.