Drivers should expect delays on Interstate 81 near Harrisonburg.
A tractor-trailer accident has closed both directions near mile marker 243. The accident knocked down power lines.
The Virginia Department of Transportation asks drivers to consider an alternate route.
There is a three-mile backup on I-81 North.
It could be several hours before I-81 re-opens, according to VDOT.
The tractor-trailer driver was not hurt.