The dashed lines on the map indicate the underground routes used to access the station, primarily via Lower Wacker Dr. Above ground, buses would use Michigan Ave. and Lake Shore Dr. north and south, in and out of downtown. West and northwest, buses would either use Washington Blvd. or Milwaukee Ave. At the time, the area expressways did not yet exist.
The map also shows the routes serving the older Union Bus Depot, at the northeast corner of Roosevelt Rd. and Wabash Ave. "X" on the lines indicate that the routes would be discontinued after moving to the new station. Buses also made a courtesy stop at a storefront station southbound on State St., between Lake St. and Randolph St. Buses departing for southerly locations would generally make the courtesy stop before serving the Union Bus Depot. Buses arriving from the south did not make the courtesy stop. Buses to and from northerly and westerly locations, made the courtesy stop after departing or before arriving the Union Bus Depot.