ROCKBRIDGE Co, Va. (WDBJ7) -- UPDATE
One northbound lane of Interstate 81 reopens after a wreck in Rockbridge County just north of the Botetourt County line.
Motorists can still expect significant delays in this area as clean-up continues.
Both northbound lanes of Interstate 81 are closed in Rockbridge County just north of the Botetourt County line.
VDOT reports there was a crash involving several tractor-trailers near mile marker 174.
Crews are working to remove the vehicles, but estimate at least an hour before a lane reopens. Traffic is currently backed up at least seven miles.
There is a detour in place for I-81 northbound.
Drivers will use exit 168 (Arcadia) in Botetourt County, follow Lee Highway north and rejoin the interstate at exit 175 (Natural Bridge) in Rockbridge County.
Stay with WDBJ7 for updates.