Bikes. He'd have his entire family on bikes.
Hey... guess what? The cars aren't working. Bikes are a better idea than the nothing you have suggested.
Rather that sit around and criticize my suggestion, make a better one. Give it a shot. That is how good ideas are formed, by everyone making a positive contribution and then the sum of those contributions become a solution.
They should have had numerous tanker trucks, filled with fuel, stationed at various points along the freeway, to keep people moving. Stalled cars blocking traffic is a major issue right now. Furthermore, the evacuation should have been led in "quadrants", ie: someone could have been directing specific sections of the city to evacuate in intervals, not all at once. They should have used radio, television, city police, national guard, whatever, directing an organized exodus to avoid gridlock. Gas shortages should have been anticipated and an influx of fuel to the area should have commenced.
One lane of traffic, or maybe the entire inbound side of the freeway should be relegated to mass transit vehicles (buses, whatever) ONLY. They then move people without transportation, or who choose not to drive en masse, from a previously established way-point to a drop-off zone outside the hurricane's path.
The airports and other civil departments should have anticipated a shortage in workers since the EXACT same thing happened in N.O. and outlying areas. National Guard should have been called in to compensate for the impending shortage.
These are all "should haves" because it's looking like the evacuation of Texas is a clusterf*ck that can not be fixed at this point. It needed to be controlled to be avoided. I can't imagine there is a solution to get people out of the gridlock that are in now. Hopefully traffic will begin to move, or better yet, hopefully the storm will lose strength, either way...the situation now seems to be what it is, and no amount of bikes, unicycles, pogo-sticks, or skateboards is going to change the outcome at this point.
I support PRE-PLANNING for disasters, not impractical - or impossible - knee-jerk reactionary emergency fixes. There were glaring failures in the planning for and response to Katrina, and it seems like they (state, local, federal) weren't any better with the planning for Rita either. /shrugs...
mrC
EDIT: Spelling