if the city loses power??? they got about enough food on hand for about 72 hours- -MAYBE.
i don't know how much gasoline they have on hand -they probably run out in hours and they be few stations able to pump gas with out power to run the pumps, very-very few stations have a back up system. -my guess is only a fraction of the population will be able to flee the city when things go bad, how many cars and trucks are sitting on empty every day in the city?
i know people who still put $5 at a time in their wheels--people in the country know to keep the gas tank topped off.
things will sour in the city FIRST then flood outward. quickly at first then slower and slower.
if i lived in the city i would have my wheels gassed up and ready to go out of town in a minutes notice.
your going to have to be the first ones out because by the time most realize they can't make it in the city they will be no way out.