In the next thirty-four years, we 300 million Americans will be joined by another 92 million. Where will all these people live, work, play, worship, buy, sell, and serve? Where will 40 million additional households be located? What sort of built environment will we produce, and what will be the results for the nation’s and the environment’s well-being? The prevailing form of land development is popularly known as sprawl or exurban sprawl. Sprawl is characterized by low density development that rigorously separates residential uses from other land uses, and that relies entirely or almost entirely on automobile transportation. There are strong reasons to prefer that the nation’s future development does not reproduce this pattern—reasons that have nothing to do with the price or availability of gasoline.