To provide a means of developing or redeveloping significant land areas considered appropriate for residential, recreational, commercial, or industrial use, or a combination of these uses, in a unified site design that allows economies of scale and creative planning and design concepts to be used. The PUD allows for the planning of a project and the calculation of densities over the entire development rather than on an individual, lot-by-lot basis. This flexibility is intended to permit innovative planning and design concepts and not merely a means to increase the density or bulk of a project without corresponding public benefits.