A semi overturned late Friday morning on the ramp from eastbound Interstate 80 to eastbound Interstate 88 causing a hazardous material spill, according to the Illinois State Police.
No one was injured in the crash, according to the state police, but it did result in a flammable liquid spilling. Motorists were being asked to use alternative routes if possible.
The interchange is just over the line where Illinois Routes 5 and 92 transition into Interstate 88. Traffic was still flowing on both interstates as of about 10:45 a.m., but but Exit 1A was closed except for emergency vehicles.
The semi, on its side, was white and was attached to a box trailer. Firefighters could be seen moving around it, and emergency vehicles were staged nearby. One of them was a ladder truck with its ladder extended.
The state police identified the liquid as UN1197.
The National Oceanic and Atmospheric Administration described the liquid as an extract or flavoring.
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The state police did not provide further detail in its release about what investigators believe caused the crash.