Metra

Metra is a commuter railroad in the Chicago city area. The railroad operates 241 stations on 11 different rail lines. It is the fourth busiest commuter rail system in the United States by ridership and the largest and busiest commuter rail system outside the New York City area. There were 83.4 million passenger rides in 2014, up 1.3% from the previous year.
The estimated busiest day for Metra ridership occurred on Nov. 4, 2016—the day of the Chicago Cubs 2016 World Series victory rally.