I attended a debrief for all the CERT Area Leaders last week, and the Chief of Police talked about evacuation routes and how sometimes the City Leaders will make changes to traffic patterns to aid in their process to get people to safety. Those decisions may hamper your original evacuation route to get out of the danger zone.
Do you have an evacuation route planned?
Do you have an alternate route?
Do you have an alternate to your alternate?
How much gas will it take to get to your bug-out location?
Does your car ALWAYS have that much gas in the tank?