Design standards for blocks are as follows:

(a) Length. The length of blocks shall be determined by public safety, traffic flow, and natural topography considerations. Where streets are approximately parallel, connecting streets shall be provided between the parallel streets at reasonable intervals as established by application of the criteria in the preceding sentence. In general, residential blocks should be between five hundred feet (500') and twelve hundred feet (1,200') in length.

(b) Width. Blocks shall be designed in two (2) tiers of lots, except where prevented by the natural topography, size of the property, or adjoining railroads or waterways, in which case the agent may approve a single tier of lots. Where the property to be subdivided adjoins an arterial road, the agent may require a single tier of lots and a restricted access easement along the arterial road.

(c) Orientation. Where a proposed subdivision adjoins an arterial or collector road, the agent may require that blocks be oriented and designed to limit or reduce the number of points of access to that road.