(A) General arrangement and layout.
The public street system pattern proposed within any subdivision plat or development should be based upon the following design concepts:
(1) Provide the adequate vehicular access to all properties within the subdivision plat boundaries;
(2) Provide adequate street connections to adjacent properties to ensure adequate traffic circulation within the general area;
(3) Provide a local street system serving properties to be developed for residential purposes which discourages through traffic while maintaining sufficient access and traffic movement for convenient circulation within the subdivision and access by firefighters, police, and other emergency services; and
(4) Provide a sufficient number of continuous streets and major thoroughfares, particularly in those areas designed for the development of high-density multi-family residential, commercial, and industrial land uses, to accommodate the increased traffic demands generated by these land uses.
(B) Major thoroughfares.
(1) Location and alignment.
The location and alignment of designated major thoroughfares must be in general conformance with the latest edition of the major thoroughfare and freeway plan adopted by the city. Proposals which constitute a change in the location or alignment of any designated major thoroughfare or freeway illustrated on this plan may be approved by the City Council if public benefit is substantiated.
(2) Right-of-way; widening; transitions.
The minimum width of the right-of-way to be dedicated for any designated major thoroughfare should not be less than 100 feet. In those instances where the plat is located adjacent to an existing designated major thoroughfare having a right-of-way of less than 100 feet, sufficient additional right-of-way must be dedicated to accommodate the ultimate development of the major thoroughfare in question on the basis of a total right-of-way width of 100 feet. Where the construction of concrete pavement with curbs, gutters, and storm sewers is not feasible and open ditch drainage is planned, the minimum right-of-way width required for the development of a designated major thoroughfare must be more than 100 feet and of sufficient width to accommodate the approved roadway pavement, attendant drainage facilities, and utilities. In those instances where it is proposed to extend an existing major thoroughfare having a right-of-way width of 80 feet, the right-of-way to be dedicated for the extension of this major thoroughfare should be increased through a transitional area from 80 feet in width to 100 feet in width over a distance of 200 feet. Similar transitional areas will be required where other existing right-of-way widths are encountered.
(3) Curves and intersections.
Curves proposed for the right-of-way of designated major thoroughfares must have a centerline radius of 2,000 feet or more. Exceptions to this requirement may be considered by the Council upon receipt of a request from the subdivider for a variance as provided herein. In no instance, however, will the Council grant a variance indicating the centerline radius of any designated major thoroughfare to be less than 1,150 feet. Reverse curves should be separated by a tangent distance of not less than 100 feet. Intersections with other public streets should be at right angles, except in those instances where the subdivider requests a variance as provided for herein. Where acute angle intersections are approved, however, a radius of at least 25 feet in the right-of-way line at the acute corner must be provided.
(C) Local streets.
(1) Location and alignment.
The location and alignment of local public streets proposed to be dedicated and established with a subdivision or development plat should be designed in conformance with the concepts listed in division (A) above.
(2) Right-of-way width; widening.
The width of the right-of-way to be dedicated for any public street not designated as a major thoroughfare or freeway must be at least 60 feet, except as provided below. In those instances where a subdivision plat is located adjacent to an existing public street, the street not being designated as a major thoroughfare, having a right-of-way width less than 60 feet, sufficient additional right-of-way must be dedicated within the subdivision plat boundary to accommodate the ultimate development of the subject street to a total right-of-way width of not less than 60 feet. A right-of-way width of 55 feet may be provided when the street is not designed to be extended into properties outside the plat boundaries, has an ultimate length not to exceed 800 feet as a cul-de-sac or when in the configuration of a loop having an internal block length of less than 1,000 feet, where storm sewers are to be provided and where the adjacent properties being platted are subdivided into lots, designed for residential purposes, having a lot width at the right-of-way line of less than 40 feet.
(3) Curves and intersections.
Curves along local streets may have any centerline radius, except that the centerline radius on a reverse curve may not be less than 300 feet. Reverse curves should be separated by a tangent distance of not less than 50 feet. Intersections with designated major thoroughfares should be at right angles, except in those instances where the subdivider requests a variance as provided for herein. Where acute angle intersections are approved, however, a radius of at least 25 feet in the right-of-way line at the acute corner must be provided.
(4) Cul-de-sac right-of-way radii.
The radii of the right-of-way at the end of local streets terminated with a circular cul-de-sac turnaround must be at least 50 feet.
(5) Dead-end streets.
Dead-end streets will not be approved except in those instances where the street is terminated by a circular cul-de-sac turnaround or where the street is designed to be extended into adjacent property.
(Ord. 96-0220, passed 2-20-1996; Ord. 19-1022A, passed 10-22-2019) Penalty, see § 154.99