South Shore Line passengers utilizing Millennium Station in the evenings will temporarily board/detrain at the Metra Depot (Tracks 5 and 6), located northwest of the SSL platform through Thursday.
During this time, work will be ongoing in the SSL depot overnight beginning at 7pm. The depot switch will not impact daytime trains, and those passengers should continue to use the SSL platform.
For more information check out mysouthshoreline.com.