ROANOKE COUNTY (WSLS 10) - A tractor-trailer crash on Interstate 81 in Roanoke County is causing delays in both directions.
The crash, which happened at mile marker 139 in the northbound lanes, is causing an 11-mile backup on I-81 North as both the north left shoulder and left lane are closed, according to the Virginia Department of Transportation.
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Southbound congestion is 4 miles long.