The incident began around 3:24 p.m. after a crash that happened in Northbrook, police said.
Eastbound and westbound lanes were closed on I-94 in the area, just east of the I-294 spur, ISP said.
A new light pole was installed, ComEd said. The roadways were reopened to traffic by 8:40 p.m., state police said.
It was not yet known if there were any injuries in the initial crash.
No further information was available.