SMYTH COUNTY, Va. -

We're learning more details after two tractor trailers collide on Interstate 81 Saturday.

Two tractor trailers crashed around 4:30 Saturday afternoon near mile-marker 55 in Smyth County.

Trooper Randy Hearl with Virginia State Police tells us one of the drivers was flown to the hospital and is in ICU, but is expected to recover.

The name of the driver is not being released at this time.

Investigators are still working on what caused the crash. Trooper Hearl tells us one trailer is still in the median and should be cleaned up Monday.