In considering applications for subdivision of land, the Planning Board shall be guided by the intent of these regulations expressed by § 2 above and the standards set forth below. These standards shall be considered minimum requirements and shall be waived by the Board only under circumstances set forth in Article
VI below.
Improvements offered for dedication to the Village
of Liberty shall be constructed to the standards contained in this
Article.
A. Right-of-way. Rights-of-way shall be provided as follows
for roads as defined by these Land Subdivision Regulations:
Type of Road
|
Minimum Right-of-Way Width
(feet)
|
---|
Major
|
60
|
Collector
|
50
|
Minor
|
50
|
B. Geometric requirements.
(1) All roads shall be designed following generally accepted
highway engineering principles.
(2) Street jogs with center-line offsets of less than
125 feet shall be avoided.
(3) In general, all streets shall join each other so that
for a distance of at least 150 feet the street is approximately at
a right angle to the street it joins.
(4) The street plan shall bear a logical relationship
to the topography of the property, and if building sites are proposed
along said proposed street, the street shall be arranged so as to
obtain as many of the building sites as possible at or above the grade
of the streets.
(5) Street grades.
(a)
Profiles. No street grade shall be less than
1% or exceed the following, with due allowances for reasonable vertical
curves:
[1]
Major traffic streets: Six percent [up to 8%
for any two-hundred-and-fifty-foot section of road].
[2]
Collector streets: eight percent [up to 12%
for any two-hundred-and-fifty-foot section of road].
[3]
Minor streets: 10% [up to 14% for any two-hundred-and-fifty-foot
section of road].
[4]
Streets shall have a grade not to exceed 3%
for a distance within 50 feet of the street right-of-way line of any
intersecting street.
(b)
Cross section. The gradients of streets shall
be not less than zero and 0.5% without curbs and gutters, and 0.3%
with curbs and gutters. On streets where curbs, gutters and sidewalks
are not required, there shall be a berm, as provided herein.
(c)
Minimum vertical and horizontal visibility,
measured 4 1/2 feet eye level to taillights 18 inches above ground
level, for curves:
[2]
Collector street: 250 feet.
(6) All street right-of-way lines at intersections shall
be rounded by curves of at least 20 feet radius. Curbs, if required,
shall be adjusted accordingly.
(7) A tangent of at least 100 feet shall be introduced
between reversed curves on all streets.
(8) Where dead-end streets are designed to be permanent,
they shall terminate in a circular turnaround paving with a minimum
right-of-way radius of 50 feet and a pavement radius of 35 feet.
C. Construction of roadway.
(1) General.
(a)
The applicant shall establish and clearly mark
the outside limits of all rights-of-way and the location and elevation
of drainage structures. Such markers shall be maintained at the applicant's
expense until construction of the roadway, drainage and shoulder have
been completed and accepted by the Village of Liberty.
(b)
Unless otherwise directed, in writing, by the
Village Street Superintendent, final grading of rights-of-way and
construction of road pavement shall be delayed until all utilities,
including house connections, have been installed and backfill in trenches
has thoroughly settled. Earth shoulders and flow lines of ditches
shall be maintained at all times at the applicant's expense during
the course of construction.
(c)
Samples of materials to be used in the construction
of the roadway shall be furnished to the Village Street Superintendent.
The applicant shall be required to pay for any standard engineering
tests which the Village Superintendent shall deem necessary.
(d)
The Village Street Superintendent or his designee
shall be granted full access to any construction taking place under
these specifications and shall be allowed to take any standard engineering
field tests which may be appropriate.
(e)
All thicknesses called for are compact thicknesses.
(f)
Guide rails shall be installed in accordance
with the latest New York State Department of Transportation requirements.
(g)
All traffic control signs installed shall be
in conformance with the New York State Manual of Uniform Control Devices.
(2) Earthwork.
(a)
Clearing and grubbing.
[1]
Clearing and grubbing shall consist of clearing
the area of all trees, downed timber, snags, brush and other vegetation
and shall be limited to that area to be covered by the roadway proper,
shoulders, side slopes and ditches.
[2]
All cleared material shall be removed from the
development or buried in a lot unsuitable for a building or otherwise
disposed of in a manner approved by the Village Engineer.
(b)
Subbase. All rock and boulders larger than six
inches in diameter shall be excavated six inches below the finished
subgrade of the roadway. All topsoil or other soft or unstable material
shall be removed from within the roadway, shoulders and ditches and
shall be replaced with suitable borrow. Fill required to complete
the approved grades shall be acceptable to the Village Superintendent.
(c)
Road section. Cut-and-fill slopes in earth shall
be not less than one or two. Subbase, at least 30 feet in width, shall
consist of a bottom course of at least 12 inches of run-of-bank gravel
and a top course of at least six inches of well-graded run-of-bank
gravel or washed gravel with no particles of material larger than
two inches in diameter. The subbase shall be crowned, shaped to a
smooth grade and well compacted.
(d)
Surfacing. Surfacing of the twenty-four-foot-wide
pavement shall consist of a minimum of three inches of base coat of
binder and a top coat of a minimum of two inches of Type No. 6 New
York State approved blacktop.
(3) Design and construction of drainage structures.
(a)
All drainage facilities with waterway area of
25 square feet or less shall be designed to accommodate runoff for
a storm of five-year frequency.
(b)
Drainage structures with a waterway area over
25 square feet will be designed by a professional engineer and shall
be capable of carrying the runoff from a storm of ten-year frequency.
(c)
In no event shall the diameter of any sluice
pipe be less than eight inches.
(d)
Drainage channels shall be designed following
generally accepted hydraulic engineering principles. Channels shall
be normally of a trapezoidal cross section with side slopes of two
feet on one foot.
(e)
The banks on both sides of drainage facilities
and bridges servicing a stream or larger watercourse shall have riprapped
construction of the banks beyond the head walls. The amount of riprap
required shall be determined by the Village Street Superintendent
and, if the Planning Board determines one is appropriate, the Village
Engineer.
(4) Turf establishment. All areas designated for turf
establishment by the Village Street Superintendent shall be seeded,
fertilized, limed and mulched.
(5) Utilities.
(a)
Wherever possible, utilities shall be underground
and shall be placed in the street right-of-way between the ditches
and outside boundary of the right-of-way to simplify location and
repair of lines when they require attention.
(b)
Whenever it is necessary that utilities cross
the roadway, they shall do so at a right angle to the roadway.
D. Variations. Variations to the standards contained
herein may be approved by the Planning Board on the recommendation
of the Village Street Superintendent in cases where unreasonable hardship
would result from strict application of the standard.
E. Street names.
(1) Types of names. All streets shown on a preliminary
layout or subdivision plat shall be named. Streets shall have names
and not numbers or letters (i.e., there shall be no streets with names
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 in the community school district
or fire district, except streets that join or are in alignment with
streets of an abutting or neighborhood property. All traditional or
historic road names shall be preserved even though the actual street
alignment has been altered. Street names shall be subject to the approval
of the Board. All new streets shall be named in the following manner:
General Directions
|
Long
|
Short
(under 1,000 feet)
|
---|
North and south
|
Avenue
|
Place
|
East and west
|
Street
|
Court
|
Diagonal
|
Road
|
Way
|
Curving
|
Drive
|
Lane or Circle
|
(3) The applicant shall pay for the cost of approved street
signs and sign posts whose design, construction and specifications
shall match those used by the Village Street Department.