From Illinois State Police:
Update: As of 5:20 p.m. CDT I-74 is back open at milepost 189. The crash has been cleared.
Earlier: As of 4:35 p.m. CDT, Troopers are on scene of a single vehicle crash in the median wires on I-74 eastbound at milepost 189. Traffic is backed up on Eastbound for approximately 4 miles back to University Avenue (milepost 185). Please use caution and avoid the area if possible for the time being.