Ahh, okay, well, the only Continental Divide Trail I know of is for hiking, not vehicles, though parts of it are largely walking along roads. I have friends who have done the whole thing as part of their quest to do the Triple Crown of hiking; the Appalachian Trail, the Pacific Crest Trail, and the Continental Divide Trail. One guy has done all three.
There's a cool
Appalachian Byway, though, 2400 miles long, that
is for vehicles and needs 4x4 for most of it, that sort of parallels the Appalachian Trail. I have some of the maps and files for that and plan on doing stretches to check it out, then perhaps thru-drive it next year.
It was developed by
@hmboverland:
Hope you find what you're looking for.