(A) Conformity to the major street (thoroughfare plan). The widths and locations of all streets in a proposed subdivision will conform to the county major street plan.
(B) Street extensions.
(1) The street layout of the proposed subdivision shall provide for the continuation or projection of streets already existing in areas adjacent to the area being subdivided unless the Planning Commission deems such continuation or extension undesirable for specific reasons of topography or design.
(2) Where, in the opinion of the Planning Commission, it is desirable to provide street access to adjoining properties, proposed streets shall be extended by dedication to the boundaries of such properties. Where the Planning Commission deems it necessary, such dead-end streets shall be provided with a temporary turn-around having a radius of at least 50 feet.
(3) The street system for the proposed subdivision shall provide for extending existing streets at the same or greater width, but in no case shall a street extension be of less width than the minimum width required in this chapter for a street in its category.
(C) Dedication of right-of-way for new streets.
(1) The dedication of right-of-way for new streets measured from lot line to lot line shall be as shown on the county major street plan, or of not shown thereon, shall meet the following standards:
Street Type | Minimum Dedicated Right-of-Way Width |
Arterial streets | 60 feet* |
Collector streets | 60 feet |
Minor streets | 50 feet |
Marginal access streets | 30 feet |
Alleys | 30 feet |
The county major street plan may indicate greater right-of-way widths for certain arterial streets, but in no case shall the subdivider be required to dedicate a right-of-way width of more than 60 feet for any one street | |
(2) All points of access shall be as approved by the Planning Commission. Marginal access streets may be required by the Planning Commission for subdivisions fronting on arterial streets.
(3) The Planning Commission may waive rights-of-way requirements for cul-de-sacs or other non-thru roadways.
(4) Through proposed business areas, street widths shall be increased ten feet on each side if needed to provide parking without interfering with normal traffic movement.
(5) In cases where topography or other physical conditions make a street of the required minimum width impractical the Planning Commission may modify these requirements.
(D) Dedication of right-of-way for existing streets. Subdivisions platted along existing streets shall dedicate additional right-of-way if necessary to meet the minimum street width requirements set forth in division (C) of this section.
(1) The entire minimum right-of-way width shall be dedicated where the subdivision is on both sides of an existing street. When the subdivision is located on only one side of an existing street, one-half of the right-of-way width, measured from the center line of the existing roadway, shall be dedicated.
(2) Dedication of one-half of the right-of-way for proposed streets along the boundaries of land proposed for subdivisions shall be prohibited.
(E) Intersections.
(1) Streets shall intersect as nearly as possible at right angles.
(2) Street curb intersections shall be rounded by radii of at least 20 feet. When the smallest angle of street intersection is less than 60 degrees, the Planning Commission shall require curb radii of greater length.
(3) No lot or other parcel of land which abuts on and has access to either a collector or minor street shall have a service drive, curb cut, or other means of access to an arterial street within 75 feet of the right-of-way of any street which intersects such arterial street on the side on which such lot or parcel is located. These 75 feet requirements can be reduced to 50 feet on collector streets and 25 feet on minor streets.
(F) Curves in streets; horizontal and vertical.
(1) A tangent at least 100 feet long shall be introduced between reverse curves on arterial and collector streets.
(2) Where there is a deflection angle of more than ten degrees in the alignment of a street, a curve with a radius adequate to insure safe sight distance shall be made. The minimum radii shall be:
Street Type | Minimum Curve Radius |
Arterial | 300 feet |
Collector | 300 feet |
Minor | 100 feet |
(3) All changes in grade for streets shall be connected by a vertical curve of a minimum length necessary to provide adequate sight distance and other safety factors.
(4) To calculate the minimum length for the curve connecting changes in grade:
(a) Calculate the algebraic difference in grades; and
(b) Multiply by the appropriate value.
Values for crest curve | Collector streets | 50 |
Minor Streets | 28 | |
Values for sag curve | Collector Streets | 50 |
Minor Streets | 35 |
(G) Street grades and elevations.
(1) Street grades shall conform to the following:
Street Type | Percent Grade | |
Allowable Maximum | Desirable Maximum | |
Arterial | 5% | 4% |
Collector | 7% | 5% |
Minor | 12% | 8% |
(2) All streets shall be designed so as to provide for the discharge of surface water from the pavement and from the right-of-way by grading and drainage. For adequate drainage, the minimum street grade shall not be less than .5%. Minimal grade of ditches shall be .5% and minimum grade of curbs and gutters shall be one-third of 1%.
(3) The Planning Commission shall not approve streets which will be subject to inundation or flooding. All streets must be located at elevations which will make them flood-free in order that portions of the subdivision will not be isolated by floods. Where flood conditions exist, the Planning Commission shall require profiles and elevations of streets in order to determine the advisability of permitting the proposed subdivision activity.
(4) Fill may be used in area subject to flooding in order to provide flood-free streets if such fill does not unduly increase flood heights. Drainage openings shall be designed so as not to restrict the flow of water and thereby unduly increase flood heights.
(H) Marginal access streets. Where the proposed subdivision abuts upon or contains an existing or proposed arterial street or highway on which traffic volumes and vehicular speeds warrant special safety considerations, the Planning Commission may require that marginal access streets be provided in order that no lots will front on such existing or proposed arterial street or highway.
(I) Street jogs. Street jogs with center line offsets of less than 125 feet shall not be made.
(J) Dead-end streets (cul-de-sacs). Minor terminal or dead-end streets or courts which are designed so as to have one end permanently closed shall not be longer than 500 feet and shall be provided at the closed end with a turn-around having a radius at the outside of the right-of-way of a least 50 feet. The paved area of the cul-de-sac shall have a minimum radius of no less than 35 feet.
(K) Street names.
(1) Proposed streets which are obviously in alignment with other already existing and named streets shall bear the names of such existing streets.
(2) The name of a proposed street, which is not in alignment with an existing street shall not duplicate the name of any existing street within the county, regardless of the use of the suffix or prefix street, avenue, boulevard, drive, place, court, lane, road, pike, highway, parkway or similar suffix or prefix.
(3) Before final plat approval, the names of streets shall be approved by the County Planning Commission.
(L) Private streets and reserve strips.
(1) There shall be no private streets platted within a subdivision, except as stated in § 190.033(B).
(2) There shall be no reserve strips in a subdivision except where their control is vested in the county, maintained by the developer or a neighborhood corporation and under conditions approved by the Planning Commission and as authorized in this chapter.
(M) Alleys. Alleys shall be provided to give access to the rear of all lots used for business and industrial purposes. Alleys shall not be provided in residential blocks except in cases where the subdivider produces evidence of the need for alleys which is satisfactory to the Planning Commission.
(N) Road specifications. County road specifications approved by the Fiscal Court are available from the County Road Engineer’s Office.
(Ord. passed 11-27-2017; Ord. 2019-08, passed 8-16-2019) Penalty, see § 190.999