Zoning that provides for a subdivision layout that conserves natural and scenic qualities of open lands. Overall development yield remains unchanged.

To promote concentration of development on one part of the site to preserve open space and reduce infrastructure costs.

Specific guidelines needed to establish applicability.

Capacity Requirements: determination of density yield can be time consuming and costly.

A lot of flexibility: applicability by zone, by area, by site for particular features, by certain state purposes, by development or land use type. Can be mandatory or optional.