For if/when TSHTF, yes, thats true, my car will not be stopping for me to nap at a roadside rest area. The question is for now when I need to stop and take a nap after dark. Used to be I'd just have both of my knives (3.5 and 4.0" blades) out and hidden under my arms. Well, I've lost the pocketknives (which sucks, both CRKT m16's with aluminum handles!), but recently got a shotgun. I don't generally need to stop between here and home, but when I am doing something like home to springfield or other 3 hour drives, if it is after dark I'll often need to stop and take a 45 minute nap. I am distrustful of people though, and after dark and alone, while I am sleeping, I am particularly vulnerable.
If TSHTF, I've got plans to take backroads to my farm, and if the roads are impassible, bike it, if can't bike, I plan on walking the 140 miles.
Edit: If I had a 3400 pound vehicle I'd be set for bugging out ;-) My sunfire is what, 2700? 3400 would mean I've got a big truck, an SUV, or a boat of a car that I can carry LOTS of stuff in :D and maybe even have REAL bumpers (oh how I wish I had metal bumpers)