(A) The street and alley arrangement shall be such as to not impose undue hardship upon the owners of adjoining property when they plat their own land and seek to provide for convenient access thereto. Reserve strips controlling access to streets are prohibited except where their control is placed with the City Council.
(B) The arrangement of rights-of-way in a subdivision shall provide for the continuation of the existing streets or rights-of-way in adjoining areas, unless the city deems such continuation undesirable for reasons of topography or design. Where subdivision streets or rights-of-way are continuations or extensions of existing streets or rights-of-way, the width thereof shall be of the same or greater width as the existing street or right-of-way; except that, in no case shall the street or right-of-way in the subdivision be of less width than hereinafter provided by the typical cross-section shown on typical cross-sections hereto attached.
(C) Where, in the opinion of the city, it is desirable to provide future street access to adjoining areas, the streets and rights-of-way in the subdivision shall be extended to the property line. If deemed necessary by the city, any temporary dead-end street shall be provided with a temporary turn-around. Access shall not be denied to any parcel or part of a parcel of ground by the subdividing of land. When cross-access between properties is provided or required, it shall be noted on the plat, and recorded ingress-egress easements shall be provided to the city.
(D) Streets shall intersect, as nearly as possible, at right angles.
(E) Local and collector street curb intersections shall be rounded by radii of at least 25 feet.
(F) Street intersections with centerline offsets of less than 125 feet are prohibited, unless otherwise permitted and approved by the city.
(G) Dead-end streets shall have a length no greater than 800 feet, except as provided herein. If topography justifies a need for a greater length, dead-end streets or cul-de-sacs designed to be so permanently, may be longer than 800 feet and will terminate in a circular open space having a radius at the outside of the pavement of at least 40 feet and a diameter at the outside of the right-of-way of at least 100 feet. Temporary dead-end streets may be permitted at a greater length if the city determines that a through connection is feasible and likely in the near future and other design requirements are met. Unless otherwise approved, the developer shall install at the entrance of all dead-end streets for which the terminus is not visible from the entrance a “no outlet” sign or other approved signage indicating that the street has no outlet.
(H) Local streets shall be designed so as to discourage through traffic.
(I) No local street grade shall be in excess of 8% and no collector street grade shall be in excess of 5%, except as otherwise approved by the city due to the adverse topographic conditions for adequate drainage. The minimum grade of any new street shall not be less than 1%, except where vertical curves in the grade line of the street make this provision inapplicable. A minimum of 500 L.F. of the existing street grade shall be shown from the point of extension for the new street to aid in evaluating the vertical alignment.
(J) The city shall not approve streets which will be subject to frequent inundation or flooding, per IDOT standards, or as otherwise specified herein.
(K) Alleys may be required in multiple-family districts and commercial or industrial districts unless other definite and assured provision is made for service access, such as off-street loading, unloading and parking consistent and adequate for the use proposed.
(L) Dead-end alleys shall not be permitted, except where provided with adequate turn-around facilities at the dead-end, or where such dead-end alleys provide the only access to off-street parking.
(M) Alleys, where provided, shall have a right-of-way of not less than 20 feet.
(N) The minimum right-of-way of local, collector and arterial streets shall be in accordance with the typical cross-sections hereto attached.
(O) Intersection of more than two streets at one point shall be avoided.
(P) Where the subdivision abuts on or contains an existing or proposed arterial street, the city may require that marginal access streets be provided in order that no lots front on such existing or proposed arterial street.
(Q) Dedication of half-streets shall be discouraged, but may be permitted whenever there is no other logical method of platting. However, wherever there exists a dedicated or platted half-street or alley adjacent to the tract to be subdivided, the other half of the street or alley shall be platted, unless otherwise permitted by the city.
(R) (1) All new streets, which are created and dedicated for use within a subdivision, shall be graded, drained and surfaced in accordance with the minimum requirements herein below set forth and in a manner which will provide complete and adequate drainage of all the streets, alleys and public grounds in the entire subdivision, including any such work which may be necessary in order to provide adequate and satisfactory drainage along the side of any existing public street which lies adjacent to the subdivision.
(2) In general, all such new streets within the subdivision and all work to be undertaken thereon shall be designed and constructed according to the specifications and policies adopted by the Division of Highways of the Department of Transportation of the state, as the same are in effect at the time the preliminary plat and plans for such improvement work are submitted for approval.
(S) The roadway shall be considered to be that part of the improvement which lies between the right-of-way lines, which roadway shall be constructed in accordance with the standards and typical cross-sections as set out in App. B of this chapter.
(T) Combination concrete curb and gutters shall be built in accordance with the detail shown in this Manual. The minimum distance from back of curb to back of curb shall be as shown in the street cross-sections in App. B of this chapter, and all curbs at driveways shall be mountable.
(U) All streets within the jurisdictional authority of the city, other than county and state highways, shall be designed as provided for in this Manual, or as determined by specific needs and designed accordingly. All streets shall be improved with pavements bounded by integral concrete curbs and gutters in accordance with the minimum criteria set forth in this Manual and shall be laid out and constructed substantially in accordance with the standards hereto attached.
(V) All new residential driveway aprons must be six-inch PCC concrete. All other driveway entrances, including multi-family three-units and above, shall be constructed to the same pavement thickness as the street it accesses.
(W) The earth sub-base shall have not less than 95% of compaction and shall extend across the entire width of the roadway and two feet behind the back of curb. In some instances, it might be necessary that the subgrade be disked or tilled to dry it to the proper moisture content for construction.
(X) The developer shall daily clean all mud and dirt from the pavement surface that has accumulated due to construction work or as a result of storm water erosion within the subdivision. No materials, debris, field trailers and the like shall be stored on the completed pavement or within the recorded right-of-way lines.
(Y) Underground utility lines in street or alley rights-of-way shall be installed prior to the construction of such streets and/or alleys. All trenches for utility lines made in the subgrade, and all trenches made outside the subgrade where the inner edge of the trench is closer than two feet to the edge of any pavement, shoulder, curb or sidewalk shall be backfilled full depth to the subgrade elevation with coarse aggregate CA-6 or CA-11. The backfill shall be compacted by tamping it in eight-inch lifts. Jetting to achieve compaction will not be allowed.
(Z) The city shall have the authority to permit the type, number and location of all entrances, exits and circulation patterns located on or accessing any development site or any public or private street within the city’s jurisdiction.
(AA) Where appropriate and as directed by the City Engineer, traffic-calming measures shall be incorporated to expedite the safe movement of traffic. (Ord. 3319, passed 2-22-2005)