A. Proposed streets should be adjusted to the conformation of the land and soil conditions so as to produce usable lots and streets of reasonable gradient.
B. The street and alley layout shall conform to the thoroughfare plan for the development of the neighborhood in which the proposed subdivision is located and shall provide access to all lots and parcels of land within the subdivision. Where streets cross other streets, jogs shall not be created. The minimum distance between center lines of parallel or approximately parallel streets intersecting a cross street should be 150 feet.
C. Proposed streets shall be extended to the boundary line of the tract to be subdivided so as to provide for normal circulation of traffic within the vicinity.
D. Wherever there exists a dedicated or platted portion of a street or alley adjacent to the proposed subdivision, the reminder of the street or alley to the prescribed width shall be platted within the proposed subdivision.
E. Widths of arterial streets and feeder streets shall conform to the widths specified in the thoroughfare plan.
F. Road connections must take place no less than six hundred and sixty (660) feet.
G. Stub connectors required for new developments: one (1) per every twenty (20) lots with a minimum of one (1) stub connector.
H. The minimum right-of-way of residential streets, marginal access streets, or cul-de-sacs shall be 50 feet. All cul-de-sacs shall terminate in a circular right-of-way with a minimum diameter of 100 feet, or other arrangement for the turning of all vehicles conveniently within the right-of-way.
I. Alleys shall be at least 20 feet in width.
J. The center lines of streets should intersect as nearly at right angles as possible, but in no case shall an angle of less than 60 degrees be created.
K. If the smaller angle of intersection of two streets is between 60 degrees and 90 degrees, the radius of the arc at the intersection of property lines shall be increased as deemed advisable by the Plan Commission.
L. Intersections of more than two streets at one point shall be avoided.
M. Where parkways or special types of streets are involved, the Plan Commission may apply special standards to be followed in their design.
N. Whenever the proposed subdivision contains or is adjacent to a highway designated as a ‘controlled access highway' by the appropriate highway authorities, or a street so designated by the thoroughfare plan, provision shall be made for a frontage access-way or a parallel access-way situated at a minimum distance of twenty (20) feet from the edge of the right-of-way and such access-way located to connect with adjacent properties or access-ways or streets. The access-way shall be designed to make the best use of access points with the "controlled access highway." Frontage access-ways shall be platted to a minimum width of 24 feet and paved to their full width (when located adjacent to the controlled access highway); otherwise, the optional parallel access-way shall be platted to a width of 40 feet and paved to a width of at least 24 feet. Access points shall be platted and improved in accordance with the street requirements in this code.
O. The following describe the different roadway classifications:
1. Highways are devoted to high-speed, long distance traffic movement with (ideally) little or no access to adjacent land. Highways typically carry over 20,000 trips per day.
2. Arterials move traffic between principal traffic generators. Direct residential access is generally discouraged, but access to commercial or industrial areas is allowed. Arterials generally carry 5,000 to 20,000 trips per day.
3. Collectors serve internal traffic functions, and generally function to connect local streets (below) to arterials. They can also provide direct access to property. Collectors typically carry 1,000 to 1,500 trips per day.
4. Local streets exist primarily to provide access to adjacent land.
P. Unobstructed sight distances measured from a point five feet above the proposed grade line, to permit horizontal visibility on all streets, must be established along the center line of such streets as follow:
1. Arterial streets: 500 feet.
2. Feeder streets, residential streets, and parkways: 300 feet.
Q. Curvature measured along the center line shall have a minimum radius as follows:
1. Arterial streets: 500 feet.
2. Collector streets: 400 feet.
3. Feeder streets and parkways: 300 feet.
4. Residential streets: 150 feet.
5. Residential streets shorter than 500 feet: 100 feet.
R. Between reversed curves on arterial streets there shall be a tangent of not less than 100 feet and on feeder and residential streets and parkways such tangent shall be not less than 40 feet.
S. Maximum grades for streets shall be as follows:
1. Arterial streets and parkways, not greater than 5%.
2. Feeder and residential streets and alleys, not greater than 8%.
T. The minimum grade of any street gutter shall not be less than 0.4%.
U. The maximum length of a cul-de-sac shall be 600 feet.