The geometric design of a driveway connection
to a Township road should be governed by sound traffic engineering
principles. Below are guidelines in preparing a geometric design,
but deviation from them will be necessitated from time to time due
to the many variables encountered in the course of preparing a design.
The applicant should be aware, therefore, that although the driveway
layout may conform to these guidelines, conditions may dictate deviations
from them, and requirements of the Township Engineer shall be final.
A. Two-way operation. Driveways used for two-way operation
shall intersect the Township road at an angle as near to 90° as
site conditions will permit and in no case will be less than 75°.
B. One-way operation. Driveways used by vehicles in one
direction of travel, right turn only, shall not form an angle smaller
than 45° with a Township road.
C. The dimensions of driveways shall be designed to adequately
accommodate the volume and character of vehicles anticipated to be
attracted daily onto the land development for which a site plan is
prepared. The required maximum and minimum dimensions for driveways
connecting to a Township road at 90° are indicated below. Driveways
serving large volumes of daily traffic or traffic over 25% of which
is truck traffic shall be required to utilize high-to-maximum dimensions.
Driveways serving low daily traffic volumes or traffic less than 25%
of which is truck traffic shall be permitted to use low-to-minimum
dimensions.
|
Type
|
Driveway Width
(feet)
|
Depressed Curb
(feet)
|
Return Radius
(feet)
|
---|
|
Residential
|
8-16
|
12-20
|
10 maximum
|
|
Commercial
|
|
|
|
|
|
1-way
|
20-34
|
24-38
|
25 minimum
|
|
|
2-way
|
24-46
|
24-50
|
40 maximum
|
|
Note: Driveways connecting to a Township road
at an angle shall have the same widths as shown in the tables above.
The width of depressed curb and the radius of curb returns shall provide
for the sharpest turning radii of vehicles using the driveway, keeping
said vehicles within their prescribed lanes.
|
D. Vertical curves and alignment.
(1) Any vertical curve on a driveway shall be flat enough
to prevent the dragging of any vehicle undercarriage. The maximum
permitted gradients for driveways are shown in the following subsection.
The profile dimensions given beyond the sidewalk are maximum for grades
and minimum for grades and minimum for grade lengths.
(2) Vertical alignment.
(a)
Residential:
[1]
With sidewalk:
[a]
First five feet: plus 12%.
[b]
Second five feet: plus 2%.
[c]
Then as a maximum: plus or minus 15%.
[2]
Without sidewalk:
[a]
First 25 feet: plus or minus 6%.
[b]
Then as a maximum: plus or minus 15%.
(b)
Commercial and multifamily residential: not
greater than 4% within 100 feet of the curbline, with a maximum of
6% at any other location.
E. Should the sidewalk be so close to the curb at a depressed
curb driveway as to cause the ramp to be too steep and is likely to
cause undercarriage drag, the sidewalk shall be approximately lowered
to provide a suitable ramp gradient.
The surface of any driveway shall be constructed
with a permanent pavement of a type specified below:
|
Driveway Surface
|
---|
|
|
Outside Right-of-Way
|
|
---|
Class
|
Within Township Right-of-Way
|
Maximum Grade Less than 6%
|
Maximum Grade More than 6%
|
Within Major Subdivision
|
---|
Residential, Classes I and II
|
|
|
|
|
1.
|
Pavement Type FABC-1, 2 inches, and requirements
|
X
|
|
X
|
X
|
2.
|
Bituminous and stabilized base course, 3 inches
|
X
|
|
X
|
X
|
2a.
|
Subbase Type 5, Class A, or Type 2, Class B,
6 inches
|
X
|
X
|
|
X
|
Commercial, Industrial and Multifamily, Class
III
|
|
|
|
|
1.
|
Pavement Type FABC-1, 2 inches
|
X
|
X
|
Not permitted
|
Not applicable
|
2.
|
Bituminous stabilized base course, 4 inches
|
X
|
X
|
Not permitted
|
|
No driveway shall be permitted to be constructed over or across the normal drainage gutter line of an existing street, except on approval of the Township Engineer. The Township Engineer shall be guided by the design standards set forth in the Chapter
265, Site Plan Review, and Chapter
298, Subdivision of Land.
No certificate of occupancy shall be issued
unless all driveways on the lot or site have been completed in accordance
with the approved plan. Inspection to assure compliance will be done
by the Township Engineer, except that Class I driveways shall be inspected
by the Zoning Officer.
[Amended 8-18-2004 by Ord. No. 2004-12]
A. Applications. All applications for a driveway permit
shall be accompanied by payment of an application fee of $50, which
shall be nonrefundable.
B. Review, inspection and administration. All applicants
for a driveway permit shall pay the cost of the review, inspection
and administration of the driveway permit by the Township Engineer.
All applications for a driveway permit for a single-family dwelling
shall be accompanied by payment of an escrow deposit of $250 for review,
inspection and administration. In the event that the driveway is in
excess of 12% slope, an additional escrow deposit of $300 shall be
paid at the time of application.
C. Additional escrow. Whenever the review, inspection
and administration costs exceed the initial escrow deposit, the applicant
shall pay any additional cost incurred prior to the issuance of a
certificate of approval by the Township.