There are some information about the fairfax connector at the various stops on the north side and south side entrances to the station. For overall info however you will have to look online or catch one of the buses as they tend to have flyers that have full schedules. I think some of these flyers are available inside the station but you may have to ask someone working at the booth.
Online or in the terminal.
Both places actually. Online is your best bet however.
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