Section 19-170-172 - Streets and highways(a) The standards for street rights-of-way shall be consistent with the standards approved by the City planning commission, but subject to approval only by the executive officer.(b) Rights-of-way and alignments are subject to the following: (1) The right-of-way and alignment of all streets shall conform to and implement the intent and purpose of the development plan. Where the development plan does not indicate street right-of-way or alignment, subdivision streets shall be laid out in the most advantageous design for the subdivision as well as for the surrounding area, and coordinated so as to compose a convenient system and subject to approval of the executive officer upon consultation with the traffic engineer and chief engineer.(2) The rights-of-way and alignments of all streets and highways shall be considered in their relation to existing and planned streets, topographical conditions, and to public convenience and safety, and in their appropriate relation to the proposed uses, surrounding zoning and development plan of the land to be served.(3) In order to provide public access or permit a satisfactory future subdivision of adjoining land and to preclude the creation of landlocked parcels, streets or access and utility easements shall extend to the boundary of the proposed subdivision and shall include the construction of facilities as required by the executive officer upon consultation with the chief engineer and traffic engineer.(4) Where a subdivision abuts or contains an existing or proposed major street the executive officer may require a frontage street or such other treatment as may be necessary for adequate protection of the lots.(c) Future streets. Where the preliminary map covers only a part of the subdivider's tract, a sketch of the proposed future street system of the entire tract shall be furnished, and the street system of the part submitted shall be considered in connection with the street system of the part not subdivided. The action by the executive officer on the preliminary map shall in no way indicate any action or approval on the part not subdivided.(d) Future subdivision. Where a tract is subdivided into larger parcels than for the minimum size lots provided for in this subchapter, the executive officer may require adequate streets to serve the future subdivision in conformity with the street and other requirements of this subchapter.(e) Intersections. Street intersections shall be as near right angles as possible. Acute angles between street intersections are to be avoided. Intersections of more than four approaches shall not be allowed unless approved by the executive officer upon consultation with the chief engineer and traffic engineer. Jogs and acute angles in a street shall be held to a minimum. When acute angles or jogs are necessary, the street intersection shall be designed with reasonably long radius as approved by the executive officer upon recommendation of the traffic engineer. At the street intersection, adjacent properties shall be so graded and developed that adequate right distance can be maintained. Streets entering upon opposite sides of any given street shall have their centerlines directly opposite each other, or said centerline shall be offset by at least three hundred feet, to eliminate close proximity of T-intersections, or as otherwise approved by the executive officer upon consultation with the traffic engineer. Intersection gradients, sight distances, offsets and design of the intersection shall be approved by the executive officer upon consultation with the traffic engineer.(f) Gradients. Gradient of all streets shall be designed for adequate drainage and traffic requirements, and the development and grading of the subdivision. Gradients shall be a reasonable minimum and in conformity with the development plan, but shall in no case be less than four-tenths of one per cent, and shall not exceed seven per cent for major and secondary streets; ten per cent for minor streets; and fifteen per cent for dead-end streets of less than three hundred feet. Where a street has a grade in excess of twelve per cent, reinforced concrete pavement is required, in conformity with the standards of the chief engineer. Modifications may be permitted by the executive officer upon consultation with the chief engineer and traffic engineer when necessary to meet topographical conditions.(g) Horizontal and vertical curves. Horizontal and vertical curves shall be designed to the standards of the traffic engineer. Modification may be permitted by the executive officer when necessary to conform to the development plan.(h) Property line radius. The property line radius at a street intersection shall be a minimum of twenty feet for secondary, minor, and dead-end streets, and thirty feet for major streets. Where streets of different widths intersect each other, the smaller radius shall govern. The executive officer may require a greater length of radius upon consultation with the traffic engineer when design of the subdivision indicates such need.(i) Existing streets. Existing streets abutting or within the proposed subdivision which are of inadequate width or are not in conformity with the development plan shall be provided with the additional rights-of-way at the time of subdivision.(j) Half streets. No half streets shall be developed except where essential to the reasonable incremental development of a subdivision, when it is in conformance with this subchapter and when the executive officer is given satisfactory evidence that the remaining half will be constructed.Haw. Code R. § 19-170-172
[Eff MAY 5 2013] (Auth: HRS §§ 206J-5(5), 206J-7) (Imp: HRS § 206J-7)