A PD Planned Development District (a “PD District”) is intended to allow the phased development of large tracts of land in a manner that will permit flexibility, that will encourage a more creative, efficient and aesthetically desirable design and placement of buildings, open spaces, circulation patterns, that will best utilize special site features such as topography, usable open space, landscape features, and that will maintain the integrity and value of surrounding areas. To the extent reasonably possible, PD Districts should provide for the integrity, maintenance, and improvement of drainageways, wetlands, and other natural features. PD Districts allow flexibility with respect to the placement of buildings and structures on the land, permissible uses of the land, and development regulations for the land, as well as flexibility with respect to the review and approval process. This authority extends to discretionary approval by the town council over concept and development plans for each PD District as required by this ordinance, including consideration by the town council of such items as proximity to major transportation arteries (such as freeways, expressways or mass transit routes), parking, setbacks, square footage of buildings and structures, sign placement, screening, landscaping, buffer zones, residential and nonresidential density, and the ratio of mixed commercial or retail and residential uses and structures. To the extent reasonably possible, PD Districts should be separated or well buffered from adjacent properties. While flexibility is given to allow special conditions or restrictions, the following procedures are established herein to ensure against inappropriate exercise of this flexibility. It is intended that, prior to the approval of a PD District, it should be demonstrated that adequate public services and infrastructure capacity exist or are planned that will support development within the PD District throughout the estimated “build out” period based on the size and nature of the proposed development within the PD District.