[jeromegv]

What are you suggesting exactly? I don't quite grasp your point

We shouldn't use bus when they are available for evacuation? Why? If we can get all the bus to be used + add bus from other cities nearby, why should we prevent people from using them? This is scaling much better and people with cars are free to leave with their own cars.

"Cars have the advantage of there are enough of them." --Surely not the case in many urban cities.

[bluGill]

I'm suggesting that all the buses in the city, are not enough to make a significant dent in the evacuation needs. This would be the case even if all transit in the city was by bus (no train/subway, and no private cars - obviously this is unrealistic).