Ha! Big Joke!

http://www.wtopnews.com/?nid=25&sid=1209833
No way. Given a major catastrophe, (atomic bomb, nerve gas, volcano, Mormon missionaries), any and all efforts to clear the region will immediately collapse. We already practice daily exercises in this matter - it's called Rush Hour, and we fail every single time. A real emergency would easily triple the number of vehicles on the road, and decrease by the same percentage their driving ability. Every road heading out will simply become a swamp of unmoving autos. The idea of one or two million people hitting the Western suburbs and then pouring into the maze of hill roads in West Virginia is silly beyond belief. You'd never make it past Falls Church.
And getting to Ohio - on what? Withing one hour of a mega-disaster, every gas station would have been drained dry, or burned down. It's a royal pain in the ass getting to West Virginia on a good day, and travelling on to Ohio would be even more so. It ain't gonna happen. Something big occurs, we sit here and die.