See
http://www.nola.com/newslogs/breakingtp/index.ssf?/mtlo... (You have to scroll way down to Aug 28 - the "permalinks" are not working)
I've seen no reports about whether the RTA buses were overwhelmed; whether the school buses were needed; whether people called, but didn't get picked up.
However - the contemporaneous do ents PROVE that Nagin offered those without transportation a way to call to get a ride to a shelter, and had buses picking people up.
Nagin had the buses but FEMA wouldn't authorize him to send them anywhere.
FEMA finally decided that the Superdome could be used as a safe shelter, even though they knew that there were no provisions for even 10,000 people no less 30,000.
Even once FEMA said it was okay to use the Superdome, they made little attempt to provide food or even water for the people that would be stuck in there. But they did have the manpower to make sure they searched everyone going in.
The public record will prove Nagin is the hero in this whole mess.