UPDATE at 3:34pm: Westbound traffic is now backed up to milepost 70, east of the Brownstown exit. Please use caution and use alternate route if possible.
According to an email from the Illinois State Police (3:06pm, Wednesday, June 20): Due to a traffic crash in construction zone at I-70 milepost 65, westbound Interstate 70 traffic will be rerouted to U.S. 40 at milepost 68. Traffic may return back to I-70 west at milepost 63. Expect traffic delays and seek alternate route if possible.