In the layout, development and improvement of a subdivision, the subdivider shall comply with all standards, specifications, codes, local laws, ordinances, rules and regulations of the Village, and, in addition, the subdivider shall meet as minimums the standards of design and principles of land subdivision set forth in this article.
Land subject to flooding and land deemed by the Planning Commission to be uninhabitable shall not be subdivided for residential occupancy nor for such other uses as may involve danger to health, life or property or aggravate any natural hazards, but such land within the area of the plan shall be set aside for such uses as shall not be endangered by periodic or occasional inundation.
A. 
General.
(1) 
The arrangement, character and extent of all streets in a subdivision shall conform to existing and approved proposed streets in the Village in relation to topographic conditions and to public convenience and safety and in their appropriate relation to the proposed uses of the subdivision to be served by such streets.
(2) 
Minor streets in a residential development shall be so laid out as to discourage through traffic, but provision for the extension and continuation of major and collector streets into and from adjoining areas is required. If the subdivision abuts an arterial highway, the Planning Commission may require reverse frontage with screen planting contained in a nonaccess reservation along the property line or such other treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic. At all times, the street layout should be logically related to the topography of the land. Intersections of minor streets with major and collector streets shall be held at a minimum to avoid hazard and delay. Half streets shall be prohibited except where it is necessary to provide the remaining half of a previously approved half street.[1]
[1]
Editor's Note: Amended at time of adoption of Code (see Ch. 1, General Provisions, Art. II).
(3) 
No street names shall be used which will duplicate or be confused with the names of existing streets in the Village or adjacent villages or towns. Streets that are extensions of or in alignment with existing streets shall bear the name of the existing streets.
(4) 
No dead-end streets shall be permitted without adequate turnaround. Dead-end streets extending to tract boundary lines which are intended to connect to future streets in adjoining tracts and dead-end streets within a tract which are to be extended shall be provided with a temporary turnaround. Appropriate arrangements shall be made for those portions of temporary turnarounds outside of street rights-of-way to revert to abutting property owners at such time as streets shall be extended.
B. 
Street alignment.
(1) 
The minimum radius at the center line for curves on major streets shall be 500 feet; for collector streets, 300 feet; and for minor streets and cul-de-sac streets, 150 feet.
(2) 
Major and collector streets shall have a tangent length of a minimum of 100 feet measured at the center line between reverse curves.
(3) 
Proper braking sight distance should be provided with respect to both horizontal and vertical alignment. Measured along the center line, the minimum braking sight distance should be 200 feet for major and collector streets and 150 feet for minor streets and cul-de-sac streets.
(4) 
Proper sight distances should be maintained at all intersections of streets. Measured along the center line, there should be a clear-sight triangle of a minimum of 75 feet from the point of intersection. No present or proposed building or obstruction shall be permitted in this area.
C. 
Street grades.
(1) 
There shall be a minimum grade of at least 1/2 of 1% on all streets. There shall be a maximum grade of 5% on major and collector streets and 10% on minor and cul-de-sac streets for a maximum distance of 1,500 feet.
(2) 
Vertical curves shall be used in changes of grade exceeding 1.0% and should be designed for maximum visibility. Intersections shall be approached on all sides by leveling areas; such leveling areas shall extend for a distance of 100 feet from the point of intersection of center lines of intersecting streets and within which no grade shall exceed a maximum of 3%.
(3) 
The following charts (A and B) set forth the maximum and minimum standards:
Chart A
Street Grade Standards
Type of Street
Standard
(percent)
Major
Collector
Minor
Cul-de-Sac
Maximum grade
5
5
10
10
Minimum grade
5
5
5
5
Maximum grade within 150 feet of center-line intersect
1
2
3
3
Chart B
Street Alignment Standards
Type of Street
Standard
(feet)
Major
Collector
Minor
Cul-de-Sac
Minimum radius of curves
500
300
150
150
Minimum tangent length between reverse curves
100
100
As Approved
Not Applicable
Minimum braking sight distance
200
200
150
150
D. 
Street widths.
(1) 
Minimum street and pavement widths shall be as shown in the accompanying Residential Road Detail.[2]
[2]
Editor's Note: The Residential Road Detail is on file at the office of the Planning Commission.
(2) 
Additional widths may be required by the Planning Commission upon findings that the same are required for:
(a) 
Public safety and convenience.
(b) 
Parking in commercial or public use areas.
(c) 
Existing streets which do not provide the proper widths and where, as a consequence, additional dedication is necessary.
(3) 
Minimum right-of-way shall be 60 feet for minor streets. A minimum temporary turnaround right-of-way radius shall be 60 feet, and a cul-de-sac shall have a minimum right-of-way radius of 60 feet.
E. 
Street intersections.
(1) 
Multiple intersections involving the junction of more than four roadways shall not be allowed.
(2) 
Right-angle intersections shall be used whenever practicable, especially when minor streets empty into major and collector streets. For intersections involving major and collector streets, angles of intersection may vary between 80º and 100º. When a minor street intersects another minor street, intersection angles may vary between 75º and 105º. Minimum distance between center-line offsets at jogged intersections involving major and collector streets shall be 200 feet. Jogged intersections involving only minor and cul-de-sac streets shall be a minimum of 150 feet.
(3) 
Street curb and gutter intersections shall be rounded by a tangential arc with a minimum radius of 25 feet for minor and cul-de-sac streets and 30 feet for intersections involving collector and major streets.
F. 
Culs-de-sac in the local street system shall not exceed 500 feet in length and must be designed with a turnaround having an outside roadway diameter of a minimum of 100 feet and a right-of-way diameter of a minimum of 120 feet.
G. 
Street pavement standards are shown in the Residential Road Detail.[3]
[3]
Editor's Note: The Residential Road Detail is on file at the office of the Planning Commission.
H. 
Service drives. Service drives shall be constructed as designed and as approved by the Planning Commission. Service drives shall have a minimum slope of 2%. Alleys are prohibited in residential developments.
A. 
Lot arrangement along a street.
(1) 
The total length of a series of lots lining a street shall have a minimum frontage length of 800 feet, with a maximum length of 1,200 feet. The length of a series of lots of a side street shall be at least two lot depths, exceptions being cul-de-sac streets. Modifications of the above criteria are possible in commercial and industrial developments.
(2) 
In subdivisions containing parks and playgrounds bounded by lots, in exceptionally long streets or where access to a school or shopping center is necessary, a crosswalk with a minimum right-of-way of 12 feet and a paved walk of six feet in width shall be provided.
B. 
Individual lots.
(1) 
The minimum lot sizes and frontage shall be controlled by the provisions set forth in Chapter 240, Zoning, of this Code. Excessive depth in relation to the width of a lot shall be avoided. A proportion of 2 1/2:1 will normally be considered maximum.
(2) 
All lots shall abut on a street, but double frontage lots are prohibited. All lot lines shall be at right angles, 90º to the street right-of-way line or to a tangent of the arc of a curved right-of-way line. If, after subdividing, there exist remnants of land they shall be included in proposed or existing lot areas.
A. 
Standards. Sidewalks shall be constructed along all streets in residential areas of the subdivision. Sidewalks shall be constructed in accordance with the two-course sidewalk detail and specifications.
B. 
Location. Location of required residential area sidewalks shall be one foot inside the street right-of-way line as shown on typical street cross sections, Illustration A,[1] or a location within the street right-of-way as approved by the Planning Commission.
[1]
Editor's Note: Illustration A is on file at the office of the Planning Commission.
The minimum building setback shall be controlled by the provisions set forth in Chapter 240, Zoning, of this Code.
A. 
Street right-of-way. If sewer, water, drainage, gas, electrical, streetlighting or other public facilities are to be located within street rights-of-way, their location and installation shall be coordinated so that they may be added to, repaired or enlarged at minimum cost.
B. 
Easements.
(1) 
If easements are used at the rear or sides of lots to provide for utilities or access to an interior park or playground, the easement shall be required to have a minimum width of 20 feet. This width may be increased at the discretion of the Village. (NOTE: Where lots back each other, this subsection would require an easement of 10 feet from each lot.)
(2) 
Easements for drainage facilities shall only be accepted when recommended by the Superintendent of Public Works and/or the Village Engineer. These easements shall be accepted only when there is a pipe system that may require maintenance by heavy equipment or in special circumstances in which the easement may be in the best interest of the Village.
A. 
Area provided for public recreation and playground use shall be approved by the Planning Commission before acceptance.
B. 
The developer shall cooperate with the Village Board to reserve a portion of the land for recreational and playground purposes.
Reasonable requirements for the preservation of outstanding natural features may be specified by the Planning Commission. These include large trees or groves, watercourses and waterfalls, historic sites, exceptional views and similar irreplaceable assets in which there is general public interest. There shall be at least one tree per lot and spaced at intervals of not more than 50 feet and two trees per lot on corner lots. No trees shall be planted within the street right-of-way. Required trees shall be located five feet to 10 feet outside the right-of-way. Trees shall be hardy, suitable to local soil and climate and of the species approved by the Planning Commission. New trees shall measure at least 1 1/2 inches in diameter as measured at a point four feet above the finished grade.