How many people use the underground trains everyday?

The number of people using the underground trains every day varies depending on the city and the specific transit system. For example, in London, England, the Underground, also known as the Tube, carries over 5 million passengers per day on average. In New York City, the subway system records an average of 5.3 million daily riders on weekdays. In Tokyo, Japan, the subway system's average daily ridership is around 8.3 million. These figures can fluctuate based on factors such as the time of day, special events, and disruptions to service.