ROANOKE COUNTY, Va. – UPDATE
As of 12:20, traffic is backed up for 4.5 miles at mile marker 143 due to an accident.
The crash at mile marker 134 has been cleared.
Two crashes on I-81 are causing delays in Roanoke County, according to VDOT.
A crash at mile marker 143 has caused a 4-mile traffic backup. The southbound left shoulder and left lane are closed.
Another crash at mile marker 134 has closed the northbound right shoulder and has caused a traffic backup of about 2 miles.