Maybe we should have gone with the national monorail system plan of the 1950s.

Remember the 1998 film Deep Impact? When the President warned everyone to get away from the Atlantic coastline when they knew that the smaller comet fragment was going to hit the ocean and make huge waves travelling hundreds of miles inland, the next scene showed thousands and thousands of cars stuck on the highways.

The only real plan for evacuting people in the event of a serious disaster affecting major cities are for the top political officials and anyone rich enough to have their own airplane or helicopter. Everyone else will do a New Orleans.