A tractor trailer accident is causing major backups on Interstate 81 in Botetourt County.
According to the VDOT, there is a tractor trailer accident on I-81 North at mile marker 173 in Botetourt County.
VDOT is reporting that all northbound lanes are closed.
VDOT also says that as of 6:20 p.m., traffic is backed up over 3 miles.