MONTGOMERY COUNTY, Va. - 9:45 a.m. UPDATE
The wreck is now cleared.
9 a.m. UPDATE
There is now a 5-mile backup. One lane remains closed.
8 a.m. UPDATE
One northbound lane is now open. There is a 7-mile backup.
A tractor-trailer wreck is causing a major backup on I-81 North in Montgomery County.
All northbound lanes are closed at mile marker 107, which is close to Radford.
There is a 1.5-mile backup, as of 6:45 a.m.
Check back for updates.
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