BRIDGEVIEW, Ill. (CBS) — A dump truck accident shut down the southbound lanes of the Tri-State Tollway near Harlem Avenue on Monday – at the height of the evening rush.

Illinois State Police said a preliminary investigation indicated that a gold Toyota sedan struck the white Peterbilt dump truck upon changing lanes. The dump truck was hauling dirt, state police said.

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The dump truck rolled over on its side and blocked all lanes of traffic, state police said.

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All the southbound lanes were closed at the scene, and traffic was only getting by on the shoulder.

Delays stretched back to the Stevenson Expressway (Interstate 55).

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The North Palos Fire Department took the drivers of the Toyota and the dump truck from the scene to area hospitals with non-life-threatening injuries, state police said.