The trooper and IDOT worker were responding to an earlier crash near the ramp at Addison when their vehicles were hit around 5:10 a.m., state police said. While it is unclear what caused the semi driver to lose control, the reason could be related to weather, investigators said.
The trooper is OK. The IDOT worker was transported to the hospital with non-life-threatening injuries, ISP said. No other injuries were immediately reported.
All lanes were blocked on outbound I-90/94 near Addison for about 90 minutes, creating a parking lot on the expressway. Traffic got by on the shoulder before lanes slowly re-opened by around 6:40 a.m.
The crash remains under investigation.