HC - Summit Station ADA Ramp Rehabilitation Project Beginning Wednesday, September 16, the existing ADA ramp at the Summit Station will be temporarily out of service for rehabilitation and is expected to remain closed for approximately two months. During this time, passengers using wheelchairs or requiring accessible access must use the existing ramp located at the southwest end of Platform 2 (inbound) to access boarding platforms.HC-Chicago Union Station-Great Hall Limited Access, October 15 On Thursday, October 15, Chicago Union Station will have limited entrance access to the Great Hall starting at 12pm through 9pm due to a scheduled event taking place. Signage will be posted regarding door closures directing traffic to accessible entrances.