I often think that when I go on road trips beyond 100 miles from home that I should really have a few more SHTF supplies than I would normally consider important. This assumes you can fit them in your vehicle. Yes, the old bug out bag or in my case, bug out tub... Something happens and what you have with you is all you got. There is likely no trip home to agonize over which of your knives you're going to take with you or to grab tarps, tents, sleeping bags, your generator, first aid supplies, and whatever you consider important. So just maybe, one should consider a good reliable fixed blade to be kept inside your vehicle. Most of us are tethered to our vehicles and the odds are, you can get to your vehicle.
A knife is a no brainer. So, as mentioned, more than likely it is your EDC knife, but you might consider keeping a fixed blade in your vehicle. Sure in an earthquake and being trapped inside an elevator, the fixed blade for prying (the old BK-2 comes to mind) would do you no good, but you can only carry so much stuff on your person.