Interstate 70 - Wikipedia
I think I saw almost NOTHING of West Virginia. Just the part on I-70. Would have been when we were on our way to Gettysburg where we then went to Cape Cod, MA from the Chicago area.
I may have to add West Virginia to states unseen as I am not sure of the route we took to Gettysburg. That would make 41 states seen so far with 9 to go.
I got my foot into Maryland when visiting Burke, VA in 2015 for a week or so and seeing much of the DC area.