Thats why I have no plans for evacuating during an emergency. You'll likely run out of gas and wind up ditching the car on the freeway. Hurricane Rita anyone?
Ditto. The more I've considered the prospect of "bugging out" the more impossible it seems. I live smack in the middle of Washington, D.C. It's gridlock half the day on a normal weekday.
I keep my fuel tank topped off most of the time but that would not be enough to even get outside the Beltway if everyone decides to go at the same time -- let alone with the added chaos of doing so under the extreme duress of a crisis. Cars would be running out of gas. There'd be fender-benders.
What would be doable is putting my dog in her bike trailer and riding out the National Mall and the C&O Canal. Would be packing a lot less stuff!