For a BOB for rural use, go car camping and day hiking with your setup. If there's a problem, you have the full compliment of gear in the car.

For urban use/shelter in place, turn off the utilities (except power to the refrigerator), and see how well you do. Take long walks with your gear (if viable) to simulate a non-motorized evacuation.

FWIW, I found a YouTube video where the presenter defined an emergency as:
1) Immediate or imminent threat of harm.
2) Limited resources
3) No exit/escape
4) Unplanned

You can rehearse the first three with safety measures close at hand. And, hopefully, by the time number 4 rolls around, you'll know what you're doing.

EDIT: Jerry, even after a big knockdown like Northridge, there are still roads open. You may need an alternate route (preplanned). And, if you have the option, staying put for a couple of hours till traffic clears the chokepoints, makes driving easier.