ROANOKE COUNTY, Va. – UPDATE
This crash has been cleared, according to VDOT.
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ORIGINAL STORY
Drivers heading south on I-81 in Roanoke County can expect delays due to a tractor-trailer crash, according to VDOT.
Officials say it happened at mile marker 138.
The south right lane and shoulder are closed, authorities said.
As of 4:15 p.m., backups are approximately 4 miles.