Renato Velasquez had allegedly been working 27 hours straight prior to the chain-reaction crash.
Prosecutors said a truck driver accused of causing a fiery crash that killed a tollway worker and critically injured a state trooper had been on the job more than a day-and-a-half, with less than four hours of sleep.
An Illinois Tollway maintenance worker was killed, and an Illinois State Police trooper was injured when a semi-tractor trailer crashed into their vehicles on the Reagan Memorial Tollway near Aurora.
A man died and another person suffered minor injuries in a single-vehicle crash on Interstate 88 near west suburban Oak Brook, authorities said.
Major construction work on one of the busiest stretches of Chicago area roadways is about to begin.