UPDATED: According to an email from the Illinois State Police at 2:35pm on Friday, June 1, 2018, I-57 is open again.
According to an email from the Illinois State Police (12:40pm, Friday, June 1, 2018): I-57 is shut down at milepost 190 (Mattoon) due to crash at milepost 189. Air Life is on scene. Traffic is being rerouted into Mattoon. Expect closure for several hours southbound.
Northbound traffic is open, but is backed up.