Three tractor trailer accidents causing backups on I-81

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ROANOKE COUNTY, Va. (WDBJ7) Three separate tractor trailer accidents are causing major backups on Interstate 81 in Roanoke County Thursday afternoon.

According to VDOT, one is near mile marker 133.7 on the northbound side. The North left shoulder, left lane, and right lane are closed, and traffic is moving on the right shoulder.

On the southbound side, at mile marker 133.8, another tractor trailer accident is causing delays for drivers.

Right now, traffic backups are approximately 7.5 miles long.

On I-81 South, near mile marker 139, a tractor trailer has the right shoulder is closed as of 4:50 p.m.

Please check back for updates.