The sheer inefficiency of basing mass urban transport by car is being demonstrated by Hurricane Matthew.
Some American Facebook friends are outraged that the evacuation plans are based on the car and there's no provision for non car owners. Of course individual cars are the worst method for evacuation. It's a parody of the usual clogging that cars do to cities. One breaks down, and the whole system grinds down. And each car would be carrying about 4 people at most.
The FB friends now say that the authorities are organising buses - which of course is what they should do during such a time, countermanding all public transport and telling people to leave with one suitcase. Leave the car behind. You're taking up far more space than you reasonably should.