A drunk driver hit two workers installing traffic signals Friday at the intersection of Bees Ferry Road and Glenn McConnell Parkway, said state Department of Transportation spokesman James Law.

Both workers were taken to an area hospital, he said.

The motorist, Harry Brabham, 54, of Glengary Court in Charleston was charged with driving under the influence, Charleston police spokesman Charles Francis said.

Emergency dispatchers got a call about the accident at 2:12 p.m., Francis said.

Law said the driver, who told police he had fallen asleep at the wheel, ran through orange barrels separating the workers from traffic. It was the third time this year that a driver has been charged with DUI after hitting a road worker in South Carolina, he said.

The workers are employed by a contractor for the Charleston County RoadWise program. They were installing the new traffic lights as part of the Bees Ferry Road widening project, he said.

The condition of the workers was not immediately available.

The county referred questions to an official with Banks Construction, who could not be reached by phone.

The Bees Ferry project includes upgrading traffic lights at the intersection of Bees Ferry Road and Glenn McConnell Parkway. Decorative poles, mast arms and pedestrian “walk and stop” signals are being installed to improve crosswalk safety, according to the RoadWise website.

Last month, a flagman working in a construction zone in Williamsburg County died at the Medical University of South Carolina after being hit by a truck.

The accident that claimed the life of Kenneth Long, 22, of Andrews happened when the driver of a pickup traveling south on S.C. Highway 41 failed to stop at a construction zone and ran into a car stopped there. The truck veered off and hit Long, according to the Associated Press.