§ 5.4. General layout requirements.

5.4.1 Conformance. The arrangement, character, extent, width, grade and location of all streets shall conform at a minimum to the comprehensive plan and these regulations.

5.4.2 Local streets and minor collectors. Local streets shall be so laid out that their use by through traffic will be discouraged. Minor collectors shall be provided to channel through traffic movements within a development, where appropriate to the design and a major thoroughfare is not proposed by the comprehensive plan. Minor collectors also may be provided as central routes within large residential subdivisions, where appropriate to the design, based on project traffic demands exceeding 2,000 trips per day (ADT).

5.4.3 Cul-de-sac streets.

1)

Dead end streets designed to have one end permanently closed shall provide a cul-de-sac turnaround and may be no more than 2,000 feet in length. Additional length necessitated by topography or property configuration may be approved by the department.

2)

The length of a cul-de-sac street shall be measured from the center of the cul-de-sac back to the center of the originating intersection.

3)

Cul-de-sacs shall conform to the layout and dimensional requirements as shown in the standard details.

5.4.4 Other dead end streets.

1)

A dead end street shall be provided to the boundary of a subdivision where necessary to provide access to a land-locked abutting property, for planned continuity of future circulation, for improved access for public safety vehicles or for the extension of public water or other utilities to neighboring lands. Such dead end streets shall be designed so as to allow their reasonable extension, and shall be located so as to be reasonably incorporated into a street design for the neighboring property. The stub street requirement may be waived by the department under extenuating circumstances.

2)

Dead end streets on abutting property shall be extended into a proposed subdivision and incorporated into the street design of the development. This requirement may be modified by the department in cases of serious topographical hardship or dissimilar zoning which would create unacceptable land use conflicts between the two developments. This modification may be conditioned on the provision of easements necessary for the extension of public utilities, the provision of cul-de-sac or other permanent turnaround on the dead end street, or the removal of the dead end street back to its nearest intersection.

3)

Where a dead end street (other than a cul-de-sac) serves more than three lots, the developer shall be required to provide a temporary vehicular turnaround within the right-of-way. This requirement may be waved if extension of the dead end street is approved and under construction prior to its inclusion in a final plat.

4)

Where a street dead ends at the property boundary and the street exceeds 1,000 feet in length, a permanent cul-de-sac shall be required. In this situation, right-of-way to the property boundary shall be required, but the pavement shall not be extended to the property boundary beyond the edge of the paved cul-de-sac turnaround. In no case shall a dead end street exceed 2,000 feet in length unless approved by the department due to unusual topographic conditions or property configuration.

5.4.5 Service roads. Where a development borders on or contains a railroad right-of-way, or a limited access highway right-of-way or a major thoroughfare, a public street may be required to be constructed and dedicated within the development approximately parallel to and on each side of such right-of-way.

5.4.6 Half-streets. Half-streets (new boundary streets having one-half of the minimum required right-of-way or pavement width) shall not be allowed nor access to same be permitted should it exist.

5.4.7 Reserve strips. Land in private ownership adjacent to public rights-of-way which could control or are intended to control access to streets, alleys, or public lands shall not be permitted unless their control is given to the county under ownership, dedication, or easement conditions approved by the county attorney or acceptable to the department. No development shall be designed so as to deny access to abutting properties.

5.4.8 Alleys. Alleys shall not be provided except where the subdivider produces evidence satisfactory to the department of the need. In the event the department approves a design that proposes alleys, the alley shall be constructed as though it were a local street pursuant to the standards contained in these regulations.

5.4.9 Street jogs.

1)

Street jogs shall either directly align or have off-sets of a minimum of 125 feet for residential S1 and S2 streets.

2)

All arterials and collectors shall provide off-sets as required by the department, where alignment is not desirable or feasible, but in no case be spaced less than 600 feet apart as measured between centerlines of said streets.