Based on my experiences during the 9/11 attack on the Pentagon, it was quite clear, from the view out my office window, that cars were nearly useless for evacuating the city. Most people just walked. All the stuck cars were an impediment to evacuation.

I think that many people should have walked out of New Orleans also. Perhaps allowing able-bodied people to stay at the stadium discouraged some from doing this. Bussing people out would have also helped.

Paul