The crash occurred during the 2 a.m. hour in the eastbound lanes between Eola Road and Route 59, traffic reporter Kye Martin said. A detour was established at Eola Road, and officials warned that heavy traffic and significant backups were expected as the morning rush unfolded.

"There's no access to any part of the tollway heading towards Naperville," Martin said, describing the situation as a "major commuter alert for the western suburbs."

Images from the scene showed a rolled-over semi truck resting in the far left lane and shoulder, surrounded by multiple emergency vehicles and firefighters. A damaged passenger vehicle was also visible, with its rear end smashed and airbags deployed.

Traffic cameras captured a long line of brake lights leading up to the crash site in the eastbound lanes.

It was not immediately clear whether anyone was injured in the collision.

The closure added to a difficult morning for drivers in the region. Other traffic alerts included a crash on I-80 in Joliet that blocked some westbound lanes, and continued closures in downtown Aurora following a building collapse Wednesday night that sent debris plummeting into the street.

Drivers were urged to avoid the area and seek alternate routes while crews worked to clear the scene.