The city leaders had at least two full days to use these hundreds of buses to evac the poor, exactly as their own emergency management plan called for.
Here's the southeast Louisiana evac plan supplement, most recently revised in 2000. Go to page 13, read paragraph 5. It states:
5. The primary means of hurricane evacuation will be personal vehicles. School and municipal buses, government-owned vehicles and vehicles provided by volunteer agencies may be used to provide transportation for individuals who lack transportation and require assistance in evacuating.
Great post!