ROANOKE COUNTY, Va. – UPDATE
As of 1:07 p.m., traffic is now clear.
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ORIGINAL STORY
A tractor-trailer crash has caused a 3.5-mile backup on I-81 North in Roanoke County, according to VDOT.
Authorities said the accident happened near mile marker 142.
As of 7:43 a.m., the northbound right lane and right shoulder are closed.
Stick with 10 News as this breaking news story develops.