CROWLEY, La. (KPEL) -- An overturned 18-wheeler has reduced Hwy. 90 to one lane near Crowley.

According to Louisiana State Police Troop I, one lane of Hwy. 90 at Dairy Road, west of Crowley, has been reduced to one lane after an 18-wheeler overturned on the highway.

Troopers expect the lane to be closed for at least the next four hours.

It was not immediately clear what caused the 18-wheeler to overturn.