The planned unit development conditional use is intended to permit developments that will, over a period of time, be enhanced by coordinated area site planning, diversified location of structures and/or mixing of compatible uses. Such developments are intended to provide a safe and efficient system for pedestrian and vehicle traffic; to provide attractive recreation and open spaces as integral parts of the developments; to enable economic design in the location of public and private utilities and community facilities; and to ensure adequate standards of construction and planning. The planned unit development under this chapter will allow for flexibility of overall development design, with benefits from such design flexibility intended to be derived by both the developer and the community, while at the same time maintaining, insofar as possible, the land use density and other standards or use requirements as set forth in the underlying basic zoning district.