2016, moving from the concourse to the headhouse. It has two stories and , double the space of the previous lounge. It features different seating areas intended for businesspeople, families and children, and people using phones or tablets. The space has bathrooms with showers, and an elevator. Platforms and tracks Union Station is laid out with a double stub-end configuration, with 10 tracks coming into the station from the north and 14 from the south. Unlike most of Amtrak's major stations, every train calling at Union Station either originates or terminates there; all passengers traveling through Chicago must change trains to reach their final destination. There are two through tracks to allow out-of-service equipment moves between the north and south side, including one with a platform to allow extra long trains to board. Between the north and south sides of the station is a passenger concourse. Passengers can walk through the concourse to get from any platform to any other without stairs or elevators. Odd-numbered platforms (1–19) are on the north half of the station, and even-numbered platforms (2–30) on the south half. The north tracks are used by Amtrak for the Hiawatha Service and the Empire Builder, and by Metra for the Milwaukee District West, Milwaukee District North, and North Central Service routes. The south tracks are used for all other Amtrak services, as well as by Metra for the BNSF, Heritage Corridor and SouthWest Services. Two station management structures (known as glasshouses), one on each side of the terminal, monitor train-to-track assignments and the flow of traffic in and out of the station. Actual oversight and control of switching and signalling is accomplished by two "train director" positions, one for each side of the station, located in the Amtrak control center in the station's headhouse. Numerous entrances provide access to Union Station's underground platform level. The main entrance is on Canal Street opposite the headhouse, but passengers can also reach the platforms directly from the headhouse via an underground passageway. Two secondary entrances are located in Riverside Plaza near the Jackson Boulevard and Adams Street bridges. On Madison Street, across the street, and one block east from Ogilvie Transportation Center, are a set of entrances to the north platforms. Architecture Union Station was designed by D. H. Burnham & Company (known for its lead architect Daniel Burnham, who died before construction began). The successor firm of Graham, Anderson,