An economically, socially, and environmentally sound balance between developed and open land. In RB-1, CR-1, CR-2, H-1 and R-2 Districts, due regard to the balance between developed and open land throughout the Town as well as the balance between developed and open land within the particular districts requires increased density limits. In undeveloped areas within the R-2 and R-3 Districts, due regard to the interests of individual landowners as well as the public interest requires limitation of densities. It is in the public interest, therefore, to shift development from the undeveloped areas within the R-2 and R-3 Districts to RB-1, CR-1, CR-2, H-1 and existing developed areas within R-2 Districts to the extent that this can be accomplished without impairing a sound balance between developed and open land in particular RB-1, CR-1, CR-2, H-1 and R-2 Districts without undue impairment of the interests of individual landowners in undeveloped areas within the R-2 and R-3 Districts. Accordingly, it is the policy and intent of the Town to permit development in RB-1, CR-1, CR-2, H-1 and R-2 Districts at increased levels of density when a developer can provide assurance of a corresponding reduction of the density of development in the undeveloped areas within the R-2 or R-3 District.