I-81 runs through the narrow panhandle of both MD and WV. What is it total through the two states, ten miles lol? Virginia has a very long stretch as does PA.
12 miles in MD, about 25 miles in WV. Virginia’s stretch is about 325 miles.
Up the valley (which is south, counterintuitively) on I-81 in Virginia is one of my favorite interstate drives, provided the truck traffic isn’t out of hand. Gorgeous country, the Shenandoah. Long slog from NoVa turning off at Roanoke and continuing on into NC via 220, though. Whole lotta nothing along the way, pretty nothing but no place to be low on gas.
About 25 miles in WV, about 13 miles in MD. VA really needs the upgrade. Half of I81 in WV is now 3 lanes each way.