GERONIMO, Okla. (AP) - The Oklahoma Highway Patrol says a state trooper has been treated and released from a hospital after a collision in Comanche County.

READ "OHP unmarked vehicle involved in car accident"

The highway patrol says the crash happened Thursday afternoon on the H.E. Bailey Turnpike. According to a preliminary report, Lt. Jerry Howell was parked on the eastbound shoulder of the road with the emergency lights activated on his vehicle.

The highway patrol says the driver of a tractor-trailer looked away from the road to pick up a cup and drifted onto the shoulder. The truck skidded more than 90 feet before striking Howell's vehicle on the shoulder.

The highway patrol says Howell suffered a head injury and was treated and released from a hospital.

Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.