A tractor trailer crash closed all northbound lanes on Interstate 81 Saturday morning. It happened in Wythe County at mile marker 68.
The traffic backup was about a half mile as of 8:25 a.m.
VDOT said northbound traffic is being detoured onto US-11 at Exit 67.
State police said they responded at 1:37 a.m. and that it’s a single-vehicle crash. The tractor trailer ran off the road, struck a guardrail, overturned and caught fire.
As of 9 a.m. state police said crews were still putting out recurring fires.
The driver was taken to a nearby hospital for treatment of minor injuries.
The crash remains under investigation, state police said.