To work, this process needs to be not only a planning process, but also a political process. While some difficult decisions will need to be made by officials, it will be crucial to allow some kind of public voice to participate in the process. The worst result would be for some detached bureaucrats to be making decisions about where people will live without any input from those people. Of course, some people will have to move, but I think the most successful approach would be one that offers people strong incentives to move, rather than one that forces people to move.