A Two Vehicle Crash In Washington County Virginia Has Left One Person Seriously Injured. It Happened Wednesday Morning When A Pick-Up Truck Traveling I-81 South In The Right Lane Stopped Just Past The Exit 29 Off Ramp. A Tractor Trailer Traveling Behind The Vehicle Was Not Able To Brake In Time And Hit The Pick-Up Sending Both Vehicles Off The Interstate. The Driver Of The Pick-Up Was Not Wearing A Seatbelt Is Hospitalized With Life Threatening Injuries. The Driver Of The Tractor Trailer Was Not Injured. The Virginia State Police Say Visibility Was Extremely Limited At The Time Of The Crash Due To Heavy Fog.