The accident has been cleared.
Traffic is backed up about three miles, according to the Virginia Department of Transportation.
The Virginia Department of Transportation is reporting an overturned tractor trailer on Interstate 81 southbound in Botetourt County.
The accident is about two miles south of the Buchanan exit at mile marker 159.
VDOT says the southbound right lane and right shoulder are closed right now.
Drivers should expect delays.
CLICK HERE to see more pictures of the accident.