I highly doubt US 48/Corridor H will ever be a four-lane highway in the state of Virginia. The four-lane highway segment will likely always have its eastern terminus right where it is today, just west of the town of Wardensville, West Virginia. I think the WV 55 designation should end at is junction with US 48 in Mooresville, and 48 should continue as the sole designation east of there to Interstate 81 in Strasburg, Virginia (the VA 55 duplex with 48 should be eliminated as well). As I've stated before, all of VA 55 to its eastern terminus at US 29 in Gainesville should be part of US 48.