Coroner Rusty Clevenger said the man was pronounced dead Sunday evening at the scene in the emergency lane of I-85 near the state Highway 290 bridge near Duncan.
Clevenger said a witness reported seeing the man fall from the bridge. The coroner said passing motorists stopped to check on the man, and it did not appear he was struck by a vehicle.
The man’s name has not been released.
The coroner’s office and Duncan police are investigating.