§ 156.0101  PREAMBLE.
   Subdividing or platting is the usual means by which open land is converted into building sites. It consists of laying out such land into streets and lots and the installation of the street and sanitary improvements necessary to provide for traffic access and for water, sewer and other utility services. Subdividing is usually the first step in the process of urbanization and urban expansion.
   (A)   The Subdivision Regulations set forth in considerable detail the general principles of design and the minimum requirements for the layout of subdivisions; the street and block layout; minimum right-of-way widths for streets of various categories, alleys and easements for utilities; minimum roadway widths, maximum street grades, minimum sight distances, the treatment of intersections; the sizes, shapes and layout of lots; recommendations with respect to recreational and other desirable open spaces; provisions for drainage, storm water management and sedimentation control; street trees and other improvements.
   (B)   An important general requirement stipulates that a subdivision be so designed as to provide for all public facilities which directly affect the tract to be platted. In general, these may include highways and thoroughfares, sites for schools, parks, playgrounds and other public facilities. The layout of a subdivision is required to conform also with the provisions of the Zoning Ordinance, as these will determine the kind of street layout, lot sizes, and other features of interior design appropriate for the subdivision.
   (C)   All existing and proposed thoroughfares shown on the Thoroughfare Plan as crossing or bordering a proposed subdivision are required to be provided in the general location and at the width designated on the Plan.
   (D)   Other principles of design and minimum requirements and standards pertain largely to the internal layout and development of the subdivision. The location, alignment and width of the street; block length; lot sizes and arrangements; and the extent and character of street and utility improvements to be installed are mainly involved. The purpose of these Regulations is to obtain, through compliance with widely recognized up-to-date principles of design and the installation of street and utility improvements of acceptable standards, healthful, safe and otherwise desirable conditions for the future users of the subdivision.
   (E)   The requirement of the installation of street and sanitary improvements prior to building construction is among the most important provisions of the Subdivision Regulations. These installations are essential to secure the health and safety of the future users of the subdivision, the larger neighborhood, as well as the community.