UPDATE:
The crash has been cleared, according to VDOT.
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ORIGINAL STORY:
Drivers heading north on I-81 in Roanoke County can expect delays due to a vehicle crash, according to VDOT.
Officials say the crash happened at mile marker 133.9.
The north right shoulder is closed, authorities say.
As of 1:51 p.m., traffic was backed up for around 6 miles.