The aerotropolis is a new urban economic form where cities are built around airports connecting time-sensitive manufacturers, distributers, and businesspeople to their suppliers, customers, and enterprise partners, near and far. Properly designed, the aerotropolis generates  a seamless multimodal “urban pipe” that reduces the time-cost frictions of distance locally, nationally, and globally, increasing operational efficiencies of aerotropolis firms and places by offering them “economies of speed”, which have become as important as economies of scale and economies of scope for many businesses and cities to compete and prosper.