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Tractor-trailer wreck cleared on I-81 North in Montgomery County

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MONTGOMERY COUNTY, Va.UPDATE

The wreck is now cleared and traffic is moving along normally. 

ORIGINAL STORY

A tractor-trailer wreck is causing a traffic issue on I-81 in Montgomery County.

One northbound lane is blocked in Christiansburg at mile marker 112. Both lanes were blocked at one point. 

A truck crashed in an overnight bridge work zone, according to the Virginia Department of Transportation. 

Expect delays. 

Check back for updates.