ROANOKE CO., Va. (WDBJ7) UPDATE, 3:00 p.m.:
The tractor trailer accident that caused some major delays on I-81N in Roanoke County has been cleared.
Traffic is still moving slowly on I-81 in Roanoke County after a tractor trailer wreck on Tuesday.
It happened at mile marker 135.
As of 2:45 p.m. backups are now down to just 1 mile.
A tractor-trailer wreck is causing major delays on I-81 in Roanoke County on Tuesday.
It happened at mile marker 135. The northbound left lane is closed.
As of 1:45 p.m., there was a 5-mile backup.