The arrangement, character, extent, width, grade, and location of all streets shall conform to all of the elements of the Comprehensive Thoroughfare Plan Map and the following:
A. Major streets and collector streets shall be planned to conform with the Comprehensive Thoroughfare Plan Map.
B. Whenever a subdivision abuts or contains an existing or proposed major street, the Plan Commission may require service streets, reverse frontage with screen planting contained in a non-access reservation along the rear property line deep lots, or such other treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic. The Plan Commission may require trails along abutting streets or within the subdivision in conformance with the Comprehensive Plan.
C. Residential and cul-de-sac streets shall be laid out so that their use by through traffic will be discouraged.
D. Where a subdivision borders on or contains a railroad right-of-way or limited access highway right-of-way, the Plan Commission may require a street approximately parallel to and on each side of such right-of-way at a distance suitable for the appropriate use of the intervening land. Such distances also shall be determined with due regard for the requirements of approach grades and future grades separation structures.
E. Easements providing access to streets shall be prohibited except where their control and maintenance is defined in a manner approved by the Plan Commission.
F. Where the plat to be submitted includes only part of the tract owned or intended for development by the party that is subdividing, a preliminary plan of a proposed future collector street system for the unsubdivided portion shall be prepared and submitted.
G. When a tract is subdivided into larger than normal building lots or parcels, such lots or parcels shall be so arranged as to permit the logical location and opening of future streets and appropriate subdivision, with provision for adequate utility easements and connections for such resubdivision.
H. Street intersections shall not be closer than one hundred fifty feet (150') centerline to centerline. This provision does not apply to frontage roads.
I. Street right-of-way widths shall be in accordance with the Comprehensive Development Plan Map with the following standards intended as minimum guidelines (actual street right-of-way widths may be greater). Where not designated in the Comprehensive Development Plan Map, street right-of-way widths, shall be not less than the following:
1. Major Streets:
a. Highways - minimum determined by State.
b. Primary Arterial - one hundred twenty feet (120') minimum.
c. Secondary Arterial - one hundred feet (100') minimum.
2. Minor Streets:
a. Collector - seventy feet (70') minimum.
b. Residential Service - sixty feet (60') minimum.
c. Cul-de-sac - sixty feet (60') minimum.
J. The grades of all streets shall not exceed the following, except in the opinion of the Plan Commission where unusual topographic conditions justify a modification of these standards. The minimum street grade shall not be less than 0.5%.
Major Street Maximum Grades (longitudinal)
| |
Highways | 5% |
Primary Arterial | 5% |
Secondary Arterial | 7% |
Minor Street Maximum Grades (longitudinal)
| |
Collector | 10% |
Residential Service | 10% |
Cul-de-Sac | 10% |
K. The horizontal alignment for all streets shall conform to the following:
Major Street Horizontal Alignment (center line radius, 40 mph design speed) |
Major Street Horizontal Alignment (center line radius, 40 mph design speed) | |
Highways | Refer to Indiana Design Manual (IDM) Chapter 43 “Horizontal Alignment” |
Primary Arterial | |
Secondary Arterial | |
Street | Minimum Radius (no super) |
Collector | Refer to Indiana Design Manual (IDM) Chapter 43 “Horizontal Alignment” |
Local | 150 feet |
Cul-de-sac | 100 feet |
L. The vertical alignment for all streets shall conform to the following (sight distance for vertical alignment shall be determined by measuring from a point four feet (4.0') above the roadway surface along a line of sight to a point four inches (4.0") above the roadway surface):
Major Street Vertical Alignment | |||
Street | Design Speed | Sag Vertical Curve (k-value) | Crest Vertical Curve (k-value) |
Highways | 40 mph | 64 | 61 |
Primary Arterial | 40 mph | 64 | 61 |
Secondary Arterial | 40 mph | 64 | 61 |
Minor Street Vertical Alignment | ||
Street | Sag Vertical Curve (k-value) | Crest Vertical Curve (k-value) |
Collector | 49 | 44 |
Local | 26 | 19 |
Cul-de-sac | 26 | 19 |
M. The paved width of all streets shall be adequate to serve the existing and future estimated traffic load for the facility. Lane widths (not including curbs) for streets shall be as follows:
Street Lane Widths
| |||
Street | Lane Width (Min. Ft.) | Lane Width (Max. Ft.) | Lane Width for Parallel Parking or Emergency Stopping (Min. Ft.) |
Major Street | 11 | 12 | 10 |
Minor Street | 11 | 12 | 8 |
N. A cul-de-sac street shall not exceed six hundred feet (600) in length, measured from the entrance to the center of the turnaround. The right-of-way radius of the cul-de-sac shall be a minimum of sixty feet (60'). The paved area (not including curbs) of the cul-de-sac shall have a minimum radius of forty-five feet (45').
O. Construction of half streets shall be prohibited; provided, however, the Plan Commission as deemed necessary may require partial right- of-way dedication.
P. The arrangement of streets shall be such as to cause no hardship in the subdividing of adjacent properties. The Plan Commission may require the dedication of street rights-of-way to facilitate the development of adjoining properties or to facilitate future improvement or expansion of streets in accordance with the Comprehensive Development Plan.
Q. There shall be a minimum of fifty feet (50') between curb cuts along all streets except in the OT or OTR districts.
R. Permanent dead-end streets shall be prohibited. When permitted, stub streets shall have approved barricades. Right-of-way shall be dedicated to allow for future cul-de-sac turnaround to comply with City of Greenwood Street Standards. Design Standards for streets are illustrated on the Standard Detail Sheets adopted by the Board of Public Works and Safety.
S. Vehicular traffic shall be protected from bodies of water on both public and private property and from topographic or geologic hazards, including, but not necessarily limited to, streams, lakes, detention ponds, ditches, ravines, rock outcrops, hillsides, or walls by one of the following:
1. “W” Beam guardrail to be installed per Indiana Department of Transportation specifications.
2. Steel Backed Timber Guardrail per U.S. Department of Transportation Federal Highway Administration Federal Lands Highway Office Standards listed in Section 617 of the Federal Highway Administration Website or approved equal as supplied by the Cor-Tenn Company of Knoxville, Tennessee.
3. Mounding of Dirt at least eight feet (8') in height with maximum slopes of 3:1.
(Ord. 20-29, § 2, 9-21-20)