The mayor of Houston now finds himself in the exact same situation with regard to ability to evacuate people without transportation in advance of Hurricane Rita, as Mayor Nagin found himself in prior to Hurricane Katrina...

White urged those who did not have the means to evacuate themselves to arrange with friends or neighbors to get out. He said if that was not possible, people should contact emergency numbers to get help from the authorities.

But he warned: "There will not be enough government vehicles to go and evacuate people in all the areas."

http://news.yahoo.com/s/nm/20050921/ts_nm/rita_houston_evacuations_dc