The incident happened around 12:20 a.m. Friday (April 22) in the southbound lanes of the Southfield Freeway, north of I-96, according to authorities.
Troopers said they were policing a traffic crash in the right lane when their patrol car was struck from behind by a Jeep Grand Wagoneer.
The driver, a 38-year-old Oak Park man, was intoxicated, officials said. A pistol was found during a search of the Grand Wagoneer, according to police.
Officials took the driver into custody and transported him for a blood draw, they said. He will be held at the Detroit Detention Center.
Both troopers were taken to a nearby hospital, treated, and released, authorities said. One has a possible concussion, and the other has a back injury.
The case is pending prosecutor review.