It is the central station of the RTA Rapid Transit system, served by all lines: Blue, Green, Red and Waterfront.

The station also includes the "Walkway to Gateway", a completely enclosed and air-conditioned skyway from Tower City Center to Rocket Mortgage FieldHouse and Progressive Field of the Gateway Sports and Entertainment Complex that allows RTA passengers, as well as patrons of the Tower City parking facilities, to walk to the arena or ballpark without the need to go outside.

Westbound trains arrived on that track and temporary platforms and station facilities were set up.

The Red Line entrance collects fares from passengers entering the station and also requires arriving passengers to swipe their proof of payment card at the gate in order to exit the station.

The high and low platform portions of the station could also be reached from each other without going through the lobby by an access ramp located along each side of tracks around the lobby; however, with the implementation of the proof of payment system on the Red Line, the ramps have been closed.