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The scale of vehicular traffic these days make such a scenario seem quaint. The highways and interstates would be littered with cars.

We already know how evacuations by car would play out; poorly.

Just check out how slow it takes to do hurricane evacuations, and we know about those days ahead of time.

Having been through a few, the general rule is this - if it normally takes 2 hours to get there, it will take 12 hours to get there.