How does this affect my trip? The Cicero station's east mezzanine-to-street auxiliary exit stairway from the mezzanine to the north side of Lake Street will be temporarily closed. Please exit the mezzanine via the station's main entrance/exit or via the station's east mezzanine-to-street auxiliary exit stairway from the mezzanine to the south side of Lake Street. Why is service being changed? We are performing station maintenance to improve the Cicero station.