South Shore Line trains will make an extra stop today (Thursday) and Friday for the Chicago Dental Society Midwinter Meeting.
Westbound trains will stop on request at McCormick Place between 10:16 a.m. and 6:04 p.m. Many eastbound trains will pick up passengers there between 12:43 and 11:08 p.m., but some rush hour trains will not stop.
Most weekend trains stop at McCormick Place upon request.
