Pure speculation on my part, but I think it's because of two matters - providing more security so searching of the evacuees is more thorough (guns dropped in Houston on arrival,m etc.); and because there is a need to specifically identify desitinations; and because there is a need to have security on each bus - yesterday's fatal accident was caused by a passenger trying to override the driver in order to get off the bus.
Makes sense. Thanks. I didn't know what the cause of the bus accident. Each bus should have an armed military guy sitting at the front, to keep order. I remember similar incidents when some loony attacked the Greyhound bus driver with a razorblade and the bus overturned.
I, too, suspect that they are not sure where to take them anymore. Why not northern LA?? Why can't they stay in their own state??