Police say a man was so impaired by drugs he didn’t know he was driving 30 miles under the speed limit and being followed by patrol cars.

Police say David F. Vanhousin, 33, was involved in a collision at the intersection of Center Point Place and South Royal Oaks Boulevard in Franklin about 1:40 p.m. Friday. Police said he struck a woman’s car and left the scene. The woman suffered minor injuries, according to Sgt. David Prather.

“It continues on and we were probably doing 5 miles per hour,” Prather said. “He eventually stopped in the middle of the road, then he started driving again.”

Vanhousin eventually stopped again. This time Prather got out of his car, walked up to the Suburban and removed the keys from the ignition.

Prather said crack cocaine was found in the vehicle, which turned out to be stolen from a collision repair center where Vanhousin worked.