As a major transfer station, Willowbrook/Rosa Parks Station also acts as a major bus hub, serving many bus routes operated by Metro and other regional/municipal transit agencies. The station also has park and ride facilities, including 975 parking spaces and 4 bike lockers. To the east of the station is the Metro Rail Operations Center, which is the dispatch hub for all Metro Rail trains.
The Blue Line is on lower platform, and the Green Line is on the upper platform. The two levels are connected by stairs/escalators/elevators via a mezzanine. Ticket machines are located on street level and the mezzanine.