All streets are to be designed in accordance with the State Department of Transportation Bureau of Design and Environment (BDE) and/or Local Roads Manual, or any replacement or substitute therefor, as such may be in effect from time to time.
(A) General. The course, general location, pavement and right-of-way width and grade of all streets shall conform to the comprehensive plan, official map and standards contained herein. The location of streets in the proposed subdivision shall be considered in their relation to existing and planned streets, to topographic conditions, to flood plains and wetlands, to public convenience and safety, and in their appropriate relation to the proposed uses of the land to be served by such streets.
(B) Arrangement of streets. Where not shown on the comprehensive plan or the official map, the arrangement of streets in a subdivision shall either:
(1) Provide for the continuation or projection of existing streets in surrounding areas; or
(2) Conform to topographic or other conditions where continuance or projection of existing streets is impractical or undesirable from the community viewpoint.
(C) Minor residential streets. Minor residential streets shall be so laid out that their use by through traffic will be discouraged.
(D) Access to existing or proposed major street. Access to an existing or proposed major street shall be limited to a minimum number of intersections and be determined with due regard for sight distance, distance between intersection and approach grades.
(E) Street grades. No street grade as measured along the centerline shall be less than 0.5% or more than 7%. The maximum grade on arterial streets shall not exceed 5%.
(F) Street intersections.
(1) Streets shall be laid out to intersect as nearly as possible at right angles, and no street shall intersect any other street at less than 60 degrees.
(2) Street intersections with centerline offsets of less than 125 feet are prohibited.
(3) Curb corners at street intersections shall have a minimum radius of 25 feet.
(G) Horizontal deflection of street lines.
(1) Where connecting street lines deflect from each other more than ten degrees, they shall be connected with a curve with a radius adequate to assure sight distance.
(2) A tangent at least 100 feet long shall be introduced between curves on collector streets where the curve radius is less than 500 feet.
(H) Alleys. Alleys shall not be permitted in proposed residential districts.
(I) Right-of-way.
(1) Street right-of-way widths for streets shown on the comprehensive plan or the official map shall follow § 155.096(L) but in no case shall be less than as follows:
Alleys | 20 |
Arterial streets (other)* | 100 |
Arterial streets (state) | IDOT requirements |
Collector streets | 60 |
Cul-de-sac | 50 |
Marginal access | 40 |
Minor streets | 50 |
Pedestrianways | 10 |
*Right-of-way width of streets and roads should be in accord with the more restrictive requirements of county, township or village having jurisdiction over right-of-way width. Extensions of collector streets and arterial streets, indicated on the official map, will, for the purpose of determining required right-of-way, carry the same classification | |
(2) In a subdivision that adjoins or includes an existing street that does not conform to the right-of-way width required above, one-half of the additional width shall be provided along each side of such street for the entire frontage included within the land being subdivided.
(J) Dead-end or cul-de-sac streets. Dead-end or cul-de-sac streets shall not be longer than 500 feet. They shall be provided with a circular turnaround having an outside surface diameter of the paved surface of at least 80 feet and right-of-way line diameter of at least 100 feet. The center of the turnaround shall be located on the centerline or between the centerline of the street and its left right- of-way line, facing into the turnaround.
(K) Dedication to public. All streets shall be dedicated to the public.
(L) Reserved strips. Reserved strips controlling access to street rights-of-way shall not be permitted except upon approval of the Planning and Zoning Commission and when control and disposition of the reserved strip is vested in the Village Board.
(M) Street names and numbers.
(1) The continuation of an existing street shall have the same name. The name of a new street shall not duplicate the name of an existing street within the area served by the same post office or Fire Department.
(2) If a proposed subdivision is in close proximity to a municipality which has adopted a street numbering system, the lots within the subdivision shall be assigned street numbers in accordance with that municipal street numbering system, where practicable.
(N) Vertical curves. All grade changes shall be connected by vertical curves. The length of vertical curves shall not be less than 30 times the algebraic difference in rates of grade for crest curves and 35 times the algebraic difference for sag curves. When speed limits are to be posted greater than 30 mph, vertical curvature shall be used as contained within the latest revision of A Policy on Geometric Design on Highways and Streets (AASHTO) for urban, local, collector and arterial streets by the respective classification. The minimum length of vertical curves on all types of streets shall be 30 feet.
(O) Horizontal curves. When a centerline deflection angle is greater than one degree, the following curves will be required in the street: major and minor arterials and collector streets shall have a minimum centerline radius of 300 feet and a minimum length of curve of 100 feet; arterials and collectors having a design speed and/or expected posted speed greater than 30 mph shall be consistent with the latest revision of the horizontal curvature requirements of AASHTO, A Policy on Geometric Design of Highways and Streets for the appropriate roadway classification; all other types of streets shall have a minimum centerline radius of 100 feet. The pavement in all cases shall be wide enough to allow the movement of an 84 passenger school bus (S-Bus) design vehicle, as described in the State Department of Transportation Bureau of Design and Environment Manual, latest version.
(P) Pavement design calculations. Pavement design calculations and supporting information as described in the IDOT Bureau of Local Roads and Streets Manual, latest edition, shall be submitted with the subdivision construction plans for review.
(2009 Code, § 35-4-3) (Ord. 91-4, passed 5-6-1991; Ord. 05-08, passed 11-14-2005; Ord. 06-04, passed 7-10-2006; Ord. 18-03, passed 2-12-2018)