(a) Generally. Streets must be designed in relation to the thoroughfare plan, existing and proposed streets, the terrain, streams, and other physical conditions. The arrangement of streets must provide for the continuation of streets between adjacent properties when the continuation is necessary for the safe and efficient movement of traffic, or for utility efficiency. Minor streets should be oriented in a manner that discourages their use by through traffic, and to allow efficient drainage systems, utility systems, and general street improvements. All streets must be designed and constructed in accordance with this section and Section 51A-8.604.
(b) Dead-end streets.
(1) Temporary dead-end streets. If adjacent property is undeveloped and a street must terminate temporarily, the right-of-way must extend to the boundary of the plat. When a temporary dead-end street is shown on a plat, a temporary circular or “T” shaped turnaround must be provided and shown as an easement on the subdivision plat, and must be indicated on the plat by dotted lines. No turnaround is required if the street is 150 feet or less in length, measured from the intersection of the street right-of-way lines with the subdivision boundary to the street’s intersection with a through street. All temporary turnarounds are subject to approval by the director.
(2) Permanent dead-end streets.
(A) Except as otherwise provided in this paragraph, if a permanent dead-end street is created within a proposed plat, a circular turnaround or other approved turnaround must be provided. The minimum radius for the circular turnaround is 50 feet for the right-of-way and 43.5 feet for the pavement measured to the back of the curb. The length of permanent dead-end streets must not exceed 600 feet, measured along the centerline from the block corner to the center of the cul-de-sac. The length of a permanent dead-end street may be extended upon recommendation of the director and the chief planning officer if they find that the extraordinary topography or shape of the property unduly limits the development potential of the property, and that the proposed development is consistent with the spirit and intent of this chapter.
(B) A waiver to the requirement of a turnaround for a dead-end street may be obtained from the director and the chief planning officer only upon their determination that a turnaround is not needed to serve the traffic on the street or otherwise needed to protect the public interest.
(c) Intersections. The following regulations govern the alignment of intersections:
(1) All streets must intersect as close to a right angle as permitted by topography or other natural physical conditions. A street must not intersect with another street or railroad at an angle of more than 105 degrees or less than 75 degrees.
(2) The intersection of two streets must not be located within 100 feet of a railroad right-of-way if one of the streets crosses the railroad right-of-way at grade. This 100 foot separation is measured from the nearest point of the intersection of the street right-of-way and the nearest point of the railroad right-of-way.
(3) A driveway or alley approach must not be located within 100 feet of a railroad right-of-way.
(4) An intersection must not have more than four street approaches.
(5) Proposed intersections along one side of an existing cross street must, wherever practical, align with existing intersections on the opposite side of the cross street. Street centerline offsets of less than 150 feet are not permitted unless the cross street is divided by a median without openings at either intersection.
(6) If served by a median opening, minor streets that intersect divided thoroughfares must be spaced at least 360 feet apart, measured from centerline to centerline unless otherwise approved by the traffic engineer.
(d) Private streets. If a private street is indicated in the street layout, it must be designed and constructed in accordance with this section and Section 51A-8.604.
(e) Street names. The naming of public or private streets created through the platting process is the responsibility of the applicant. Street names must conform to the standards for street names contained in Division 51A-9.300 of this chapter. All proposed street names must be reviewed by the fire department, the department of development services, and the police department before consideration by the commission. (Ord. Nos. 20092; 21186; 23384; 25047; 28073; 28424; 29478; 31314; 32002)