If you don't have a TV or radio, how can you find out there is a bus?
Actually, they went up and down streets with bullhorns and PA systems telling people about the buses to the Dome.
If there are no buses provided how can you get on a bus?
They rode through the neighborhoods with LOUD SPEAKERS all day Saturday and Sunday.
Approximately 100,000 people left.
Most of the people were together in houses to ride out the storm; now if they didn't know there was a storm coming, how did they know to get together to ride out the storm?
Next excuse?
Very, very few people in 2005 America don't have TV or a radio, or access to a relative's or friend's or employer's TV or radio. Sorry. I don't buy the "too poor" excuse. There are many litigimate reasons why a minority of people could not leave on their own -- disability, advanced age, illness, late-stage pregnancy, etc. But with adequate advance planning, coordination and training by city, county (parrish) and state officials, any number of alternative modes of transportation could have been mobilized to evacuate such folks.