[Adopted 6-6-1996]
Shared driveways shall be constructed to provide
adequate access for emergency vehicles and shall meet the following
minimum standards:
A.Â
Widths. Traveled way shall be a minimum of 16 feet
in width. Shoulders shall be two feet in width.
B.Â
Construction. The center-line grade for any shared
driveway shall not be less than 0.75% nor greater than 8%. Shared
driveways shall be graded to allow stormwater to flow off the driveway
at low points and to prevent puddling. Shared driveway construction
specifications shall be the following:
(1)Â
Compacted subgrade, free of frost, roots and debris.
(2)Â
Six-inch gravel base conforming to Standard Specifications
for Highways and Bridges (SSH&B) MI.03.0, Type B, compacted to
a minimum of 95% of American Association of State Highway Transportation
Officials (AASHTO) Test Designation T99 Compaction Test Method at
optimum moisture content.
(3)Â
Three inches dense graded crushed stone surface conforming
to SSH & B M1.03.0, Type B, compacted to a minimum of 95% of AASHTO
Test Designation T99 Compaction Test Method at optimum moisture content.
(4)Â
The aprons for shared driveways shall be constructed to the bituminous sidewalk standard of the Planning Board's Subdivision Rules and Regulations [see Part 2 of this chapter, § 381-24A(1)], for the first 20 feet from the driveway intersection with the street. Shared driveways shall not direct stormwater runoff into the right-of-way of an existing street. Shared driveways can direct stormwater into the proposed right-of-way of a new subdivision road if the overall proposed stormwater management system is designed to accommodate the runoff.
C.Â
Wiring. Utilities may be placed above ground unless
the shared driveway provides access to lots located within a subdivision
served by underground utilities.
D.Â
Location. Shared driveways shall be located and designed
so as to minimize conflict with traffic on public streets and to provide
visibility and sight distances which are safe and adequate for observation
of approaching vehicles and pedestrian traffic. A minimum sight distance
in all directions shall be provided as follows. Shared driveways shall
be set back a minimum of 10 feet from the property line, except in
the location where the driveway accesses the public way, unless waived
by the Planning Board.
[Amended 3-22-2007]
|
AASHTO Minimum Sight Distance1
| ||
|---|---|---|
|
Design Speed
(mph)
|
Minimum Sight Distance
(feet)
| |
|
20
|
125
| |
|
30
|
200
| |
|
40
|
275
| |
|
50
|
400
| |
|
1
|
NOTE: AASHTO PGDHS-1990, Tables III-1 and III-5.
|
[Added 3-22-2007]
Any person who submits an application for a
special permit for a shared driveway to the Board for approval shall
file therewith the following:
A.Â
A properly executed application form and certified
list of abutters in accordance with the forms on file with the Planning
Board.
B.Â
Three full-size (24 inches by 36 inches) prints of
the shared driveway plan, dark line on white background, and 20 reduced
(11 inches by 17 inches) prints of the plan on eleven-by-seventeen-inch
paper. Reduced prints will be referred by the Board to other Town
officials for review.
C.Â
A plan demonstrating that access is possible through
lot frontage as required in § 218-23D, Shared driveways.
D.Â
A plan demonstrating that the proposed shared driveway
will provide adequate access for emergency vehicles.
E.Â
Accompanying statements regarding any proposed access
or utility easements.
F.Â
Drainage specifications, including drainage calculations,
for the proposed stormwater management system. A copy of the operating
and maintenance plan for stormwater management system on 8Â 1/2
inches by 11 inches paper.
