Authorities and emergency medical workers are now on the scene of a single vehicle crash on State Road 20 just west of Clarksville. According to Trooper Lonnie Baker, the driver of a pickup ran off the road and the vehicle overturned, totalling the truck. A helicopter is en route to airlift the driver to an area hospital for treatment. Trooper Baker says the man, who is not local, is expected to recover from his injuries.