UPDATE: Friday, 4:15 p.m.
Both lanes of travel on Interstate 81 southbound are back open to traffic following a tractor trailer crash that occurred just after 2:30 p.m.
No information has been released from police on the condition of the driver of the 18-wheeler.
The Tennessee Department of Transportation is reporting an overturned tractor trailer in the Colonial Heights area of Kingsport that is causing heavy, slow traffic on Interstate 81.
The Kingsport Police Department reports that the southbound lanes are completely blocked and TDOT estimates the crash scene will be cleared after 4:30 p.m. Friday afternoon.
Up to date road conditions can be accessed by clicking here.