In considering applications for subdivision of land, the Planning Board shall be guided by the intent of this chapter expressed by Article
I above and the standards set forth below. These standards shall be considered minimum requirements and shall be waived by the Planning Board only under circumstances set forth in §
220-12 herein.
[Added 4-15-1971]
For all subdivisions, the applicant shall arrange
with the serving utility for the underground installation of the utilities
distribution supply line and the service connections and streetlighting
facilities. The applicant shall submit to the Planning Board, prior
to the granting of final approval, a written instrument from each
serving utility, which shall evidence full compliance with the provisions
of this section.
[Added 4-15-1971; amended 6-10-1976 by L.L. No. 6-1976]
Streetlights shall be required for all new streets
and shall conform to the Village specifications. The type of lights
and posts and the location of lights in the subdivision shall be approved
by the Planning Board Engineer before installation.
[Added 4-15-1971]
The Board of Trustees may waive the requirements of §
220-21 upon the recommendations of the Planning Board.
When streets are not indicated on the Master
Plan or the Official Map, the classification of the street shall be
determined by the Planning Board. In regulating subdivisions, these
provisions shall be considered the minimum requirements. The Planning
Board may, however, modify or extend these provisions in appropriate
cases as may be required.
A. Standards for street design.
(1) Minimum standards. Minimum standards shall be as follows:
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Street Classification
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Standard
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Minor
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Collector
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Minimum width of right-of-way (feet)
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50*
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60
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Minimum width of pavement (feet)
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30*
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36
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Minimum radius of horizontal curves (feet)
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150, except for street intersection corners (See § 220-25C below.)
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250
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Minimum length of vertical curves (feet)
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100, but not less than 20 additional feet for
each 1 1/2% or part thereof algebraic difference of grade
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200, but not less than 50 additional feet for
each 1% algebraic difference of grade
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Minimum length of tangents between reverse curves
(feet)
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100, except where excessive grades may be reduced
to reasonable grades by shortening tangent
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200
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Maximum grade
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8%, except that grades up to 12% may be approved
on short runs
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6%
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Minimum grade
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1/2%
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1/2%
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Minimum sight distance (feet)
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150
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300
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*NOTE: In subdivisions where there is a need
to preserve the natural terrain and maintain the scale of street layouts,
the Planning Board may reduce the right-of-way to 40 feet with a paved
area of 26 feet. This will be done only after the plan of the subdivision
has been approved based on a fifty-foot right-of-way street layout.
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(2) Standards for gutter line gradients and culs-de-sac.
Gutter line gradients and culs-de-sac shall be a minimum of 0.5%.
(3) Minimum length of vertical curves.
(a)
The length (L) in feet of a vertical curve shall
be related to the algebraic difference in the percent of grade (A)
and a constant (K = 35 for both major and minor streets) according
to the following formula: L = KA.
(b)
This formula shall be used for both sag and
crest vertical curves.
(c)
Where terrain conditions make this criterion
impractical, then basis for design curvature must be specially approved
by the Planning Board.
B. Grades near intersection. Grades of all streets shall
conform in general to the terrain and shall not be more than 2 1/2
within 100 feet of the center line of any intersection.
C. Curve radii at street intersections. All street right-of-way
lines at intersections shall be rounded by curves at least 25 feet
radius, and curbs shall be adjusted accordingly.
D. Steep grades and curves: visibility at intersections.
A combination of steep grades and curves shall be avoided. In order
to provide visibility for traffic safety, that portion of any corner
lot, whether at an intersection entirely within the subdivision or
of a new street with an existing street, which is shown shaded on
Sketch A shall be cleared of all growth except isolated trees and
obstructions above the level three feet higher than the center line
of the street If directed, ground will be excavated to achieve visibility.
E. Culs-de-sac. Where dead-end streets are designed to
be so permanently, they should, in general, not exceed 500 feet in
length and shall terminate in a circular turnaround having a minimum
right-of-way radius of 50 feet and pavement radius of 34 feet. At
the end of temporary dead-end streets, a temporary turnaround with
a pavement radius of 40 feet shall be provided, unless the Planning
Board approves an alternate arrangement.
F. Watercourses.
(1) Where a watercourse separates a proposed street from
abutting property, provision shall be made for access to all lots
by means of culverts or other structures of design approved by the
Planning Board Engineer.
(2) Where a subdivision is traversed by a watercourse,
drainageway, channel or stream, there shall be provided a stormwater
easement or drainage right-of-way as required by the Planning Board
Engineer and in no case less than 20 feet in width.
G. Curve data. In general, street lines within a block
deflecting from each other at any one point by more than 10º
shall be connected with a curve, the radius of which for the inner
street curve shall not be less than 250 feet on collector streets
and 100 feet on minor streets. The outer street curve in each case
shall be the same radius point as the inner street curve. A vertical
curve is required where there is a change in grade of more than 1 1/2%
so that clear visibility shall be provided for a safe distance.
H. Improvements required. Streets shall be graded and
improved with pavements, curbs and gutters, sidewalks, drainage facilities,
water mains, sewers, streetlights and signs, street trees and fire
hydrants, except where waivers may be requested, and the Planning
Board may waive, subject to appropriate conditions, such improvements
as it considers may be omitted without jeopardy to the public health,
safety and general welfare. Pedestrian easements shall be improved
as required by the Planning Board Engineer. Such grading and improvements
shall be approved as to design and specifications by the Planning
Board Engineer.
I. Utilities in streets. The Planning Board may require
that underground utilities be placed in the street right-of-way between
the paved roadway and street line to simplify location and repair
of lines when they require attention. The subdivider shall install
underground service connections to the property line of each lot within
the subdivision for such required utilities before the street is paved.
J. Utility easements. Where topography is such as to
make impractical the inclusion of utilities within the street rights-of-way
or when required by the Planning Board, perpetual rear line unobstructed
easements at least 20 feet total in width shall be provided with satisfactory
access to the street. Wherever possible, easements shall be continuous
from block to block and shall present as few irregularities as possible.
Such easements shall be cleared and graded where required.
K. Service streets or loading space in commercial development.
Paved rear service streets of not less than 20 feet in width or, in
lieu thereof, adequate off-street loading space, suitably surfaced,
shall be provided in connection with lots designed for commercial
use.
L. Free flow of vehicular traffic abutting commercial
developments. In front of areas zoned and designed for commercial
use or where a change of zoning to a zone which permits commercial
use is contemplated to permit such use, the street width shall be
increased by such amount on each side as may be deemed necessary by
the Planning Board to assure the free flow of through traffic without
interference by parked or parking vehicles and to provide adequate
and safe parking space for such commercial or business district.
M. Street names.
(1) Type of name. All streets shown on a preliminary layout
or subdivision plat shall be named or approved by the Planning Board.
Streets shall have names and not numbers or letters, such as "1st,"
"First" or "A" Street.
(2) Names to be substantially different. Proposed street
names shall be substantially different so as not to be confused in
sound or spelling with present names within the Village limits and,
insofar as possible, in any school district or fire district which
may be partially in other Villages or the Town of Brookhaven.
(3) Existing and traditional names. All existing street
names shall be extended where proposed streets follow along their
alignment. All historic or traditional names shall be preserved even
though the actual street alignment has been changed.