Tractor trailer causing backups on Interstate 81 North in Roanoke County
A broken down tractor trailer is causing delays on Interstate 81 North in Roanoke County.
The disabled semi is in the area of Mile Marker 132, the Dixie Caverns exit.
Backups are currently at 6 1/2 miles.
A wrecker is en route, but drivers are urged to avoid the area and expect delays.
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