A.
All material standards, specifications, methods of construction,
and methods of measurement shall be in accordance with the current
Standard Specifications for Construction and Materials and the current
Book of Standards for Highway and Incidental Structures, Maryland
Department of Transportation, State Highway Administration, as amended
from time to time. The Engineering Division Chief shall be responsible
for interpretations of such state specifications and standards and
the standards established in this chapter.
B.
All road design criteria shall be in accordance with the current
AASHTO A Policy on Geometric Design of Highways and Streets, and the
Calvert County Construction Standards for Roads, Streets, and Incidental
Structures.
C.
Where not specifically covered by this chapter, materials and construction
methods shall be based on the appropriate State of Maryland, Department
of Transportation, State Highway Administration, Standards and Specifications
with all current errata and addenda.
D.
Any request to modify these typical sections shall be forwarded to
the Engineering Division Chief in writing by the engineering professional
representative and shall include adequate justification as to why
such modifications are necessary.
A.
Roads are classified according to the intended use and projected
traffic capacity requirements. The right-of-way and pavement widths
shall be consistent for the entire road unless the same road has multiple
classifications as defined in RD-11 and RD-11A of the Calvert County
Construction Standards for Roads, Streets, and Incidental Structures.
B.
Classifications assigned to roads are as follows:
(1)
Residential/local roadway: RD-1 Category.
(a)
The designation of RD-1A shall apply to a private road to serve
and provide access exclusively to the properties abutting thereon,
for which there is an approved family conveyance subdivision, a subdivision
recorded prior to the adoption of the Calvert County Zoning Ordinance
(C.C.Z.O.) on July 29, 1967, and minor subdivisions within the Rural
Community Districts and Farm and Forest Districts.
(b)
Designation of RD-1B.
[1]
The designation of RD-1B shall apply to a private lane intended
to serve a maximum of seven nonfamily conveyance lots and provide
access exclusively to the properties abutting thereon.
[2]
The minimum right-of-way width is 30 feet.
[3]
Must meet all horizontal and vertical requirements of a public
road.
[4]
May remain private but has the option in the future to become
a public road through a road tax district.
(c)
Designation of RD-1C.
[1]
The designation of RD-1C shall apply to a private alley intended
to provide access exclusively to the properties abutting thereon.
[2]
The placement or construction of any item that obstructs pedestrian
or vehicular access within an alley is prohibited.
[3]
No fixed structures of any kind, such as sheds or fences, or
portions thereof shall be constructed within the alley right-of-way.
[4]
An alley right-of-way within a newly recorded subdivision is
generally owned and maintained by a property owners' association.
Existing platted alley rights-of-way in existing subdivisions may
be owned by an existing property owners' association, the owned/developer
of the subdivision, or by the County.
[5]
The entity responsible for maintenance of an alley right-of-way
shall ensure the alley remains in a safely passable condition. Maintenance
shall include, but is not limited to, mowing, litter pickup, and trimming
and removal of all trees, vegetation and shrubs within the alley right-of-way.
[6]
No maintenance is provided in any County-owned unimproved rights-of-way
or alleys.
[7]
An alley right-of-way may be used for installation of underground
utilities.
(2)
Residential/local roadway: RD-2 Rural Category shall apply to a public
road intended to serve and provide access exclusively to the properties
abutting thereon.
(3)
Residential/Local Roadway: RD-3 Category. The Director's prior
approval is required for use of this type.
(a)
The designation of RD-3A, Rural, shall apply to a public road
intended to serve and provide access exclusively to the properties
abutting thereon within newly created subdivisions serving six to
10 lots, or the right-of-way is an existing recorded forty-foot- to
fifty-foot-wide reserved area serving existing recorded lots.
(b)
The designation of RD-3B, Urban, shall apply to a public road
intended to serve and provide access exclusively to the properties
abutting thereon within newly created subdivisions serving six to
10 lots, or the right-of-way is an existing recorded forty-foot- to
fifty-foot-wide reserved area serving existing recorded lots.
(c)
The designation of RD-3C, Urban, shall apply to a public one-way
roadway intended to serve and provide access exclusively to the properties
abutting thereon within newly created subdivisions serving six or
more lots.
(4)
(5)
Minor Residential Collector Roadway: RD-5 Category.
(a)
Designation of RD-5A, Rural.
[1]
The designation of RD-5A, Rural, shall apply to a public road
serving 51 to 150 lots within a newly created single-family subdivision
which, in addition to providing access to properties abutting thereon
accommodates the movement of traffic from lower to higher classification
roads. The section of roadway serving the 51 to 150 lots shall be
designed to this standard. Roadways accessing this roadway may be
built to this standard or to RD-4 standards at a minimum.
[2]
Roadway width requirements are based on the number of lots served.
(b)
The designation of RD-5B, Urban, shall apply to:
[1]
A public road serving 51 to 150 lots within a newly created
single-family subdivision which, in addition to providing access to
properties abutting thereon accommodates the movement of traffic from
lower to higher classification roads. The section of roadway serving
the 51 to 150 lots shall be designed to this standard. Roadways accessing
this roadway may be built to this standard or to RD-4 standards at
a minimum.
[2]
A private road intended to serve as the principal residential
roadway within a townhouse or multifamily development of 100 to 150
units.
[3]
A private road servicing uses open to the general public.
[4]
A private road that provides through traffic.
(c)
The designation of RD-5C, Urban, On-Street Parking, One Side
of Road shall apply to:
[1]
A public road serving 51 to 150 lots within a newly created
single-family subdivision which, in addition to providing access to
properties abutting thereon accommodates the movement of traffic from
lower to higher classification roads. The section of roadway serving
the 51 to 150 lots shall be designed to this standard. Roadways accessing
this roadway may be built to this standard or to RD-4 standards at
a minimum.
[2]
A private road intended to serve as the principal residential
roadway within a townhouse or multifamily development of 100 to 150
units.
[3]
A private road servicing uses open to the general public.
[4]
A private road that provides through traffic.
(d)
The designation of RD-5D — Urban, On-Street Parking, Both
Sides of Road shall apply to:
[1]
A public road serving 51 to 150 lots within a newly created
single-family subdivision which, in addition to providing access to
properties abutting thereon accommodates the movement of traffic from
lower to higher classification roads. The section of roadway serving
the 51 to 150 lots shall be designed to this standard. Roadways accessing
this roadway may be built to this standard or to RD-4 standards at
a minimum.
[2]
A private road intended to serve as the principal residential
roadway within a townhouse or multifamily development of 100 to 150
units.
[3]
A private road servicing uses open to the general public.
[4]
A private road that provides through traffic.
(6)
Residential Collector Roadway: RD-6 Category.
(a)
The designation of RD-6A, Rural, shall apply to a public road
intended to serve and provide access to newly created single-family
subdivisions with more than 150 lots. The section of roadway serving
these lots shall be designed to this standard. Roadways accessing
this roadway may be built to this standard or to RD-4 or RD-5 standards,
depending on the number of lots the roads serve.
(b)
The designation of RD-6B, Urban, shall apply to:
[1]
A public road intended to serve and provide access to newly
created single-family subdivisions with more than 150 lots. The section
of roadway serving these lots shall be designed to this standard.
Roadways accessing this roadway may be built to this standard or to
RD-4 or RD-5 standards, depending on the number of lots the roads
serve.
[2]
A private road intended to serve as the principle residential
collector roadway within a townhouse or multifamily development of
greater than 150 units.
[3]
A private road servicing uses open to the general public.
[4]
A private road that provides through traffic.
(7)
Minor Collector Roadway: RD-7 Category.
(a)
The designation of RD-7A, Rural, shall apply to a public road
which primarily accommodates the movement of traffic from lower classification
roads to the arterial network and links major land uses and traffic
generators of County significance to the arterial network, serving
average daily traffic (ADT) volumes greater than 2,000 vehicles per
day.
(b)
The designation of RD-7B, Urban, shall apply to a public road
which primarily accommodates the movement of traffic from lower classification
roads to the arterial network and links major land uses and traffic
generators of County significance to the arterial network, serving
average daily traffic (ADT) volumes greater than 2,000 vehicles per
day.
(8)
Commercial and industrial roadways: RD-8 Category.
(9)
The designation of Major Connector: RD-9 Category, shall apply to
a public road which primarily accommodates the movement of traffic
to and from the arterial network serving average daily traffic (ADT)
volumes greater than 4,000 vehicles per day.
(10)
The designation of Town Center Boulevard Roadway: RD-10, shall
apply to a public road which primarily accommodates the movement of
traffic between commercial and residential development within town
centers.
(11)
The designation of Common Access Driveway (Private): RD-16,
shall apply to:
(a)
A private access area.
(b)
A minimum of 50 feet and a maximum 75 feet wide by a minimum
of 50 feet and maximum of 75 feet long, commonly owned and privately
maintained by adjoining lot owners.
(c)
Created to provide access to three to five residential lots.
(d)
When a common access driveway accesses a collector road, the
use of a modified transition lane/deceleration lane (RD-18A) shall
be used.
B.
Minimum pavement sections.
(1)
Minimum pavement sections shall be consistent for the entire road
section as defined on Plate RD-12 and RD-12A of the Calvert County
Construction Standards for Roads, Streets, and Incidental Structures.
(2)
The pavement depth requirements are minimum standards. Variances
to these typical sections may be required by the Director due to,
but not limited to, soil conditions, traffic loading, or frost level.
(3)
Any variance to the minimum standards requested by the permittee
shall be approved by the Director. The proposed typical section shall
meet the minimum pavement design criteria per AASHTO or comparable
State of Maryland criteria as submitted by the engineering professional
representative or a geotechnical representative. Any variation from
the pavement design of AASHTO/Maryland State standard must be submitted
in writing for the Engineering Division's review and approval
by the Director.
A.
Horizontal alignment.
(1)
Traffic way center lines within a curve shall be connected by a horizontal
curve with a minimum radius, as shown in Plate RD-11 and RD-11A of
the Calvert County Construction Standards for Roads, Streets, and
Incidental Structures, when the center line changes direction by more
than 30 minutes (0deg30'). The Director may approve a variance
to this condition on a case-by-case basis when required by unusual
or special conditions.
(2)
Horizontal curve data shall be computed by the arc definition of
a circular curve.
(3)
A tangent of a least 100 feet shall be used between reverse curves.
(4)
Tangents should not be introduced between two curves in the same
direction unless the length of the tangent is greater than 500 feet.
B.
Vertical alignment.
(1)
Finished road grades shall be in accordance with the following standards:
(a)
Roads shall be designed and constructed so that finished grades
do not exceed 8% for collector and commercial roads, and 10% for residential
roads and common access drives. No grade shall be less than 1%. The
maximum grade in a cul-de-sac shall not exceed 6%. The maximum grade
in a roundabout shall not exceed 4%.
(b)
Gutter grades on concrete and paved gutters shall be not less
than 1%.
(c)
Vertical changes in road grades of more than 1% shall be connected
by vertical curves with a minimum length of 100 feet.
(d)
Tabulation of vertical standards is shown on Plate RD-11 and
RD-11A of the Calvert County Construction Standards for Roads, Streets,
and Incidental Structures.
(e)
Standard landing requirements for residential or collector roads,
common access drives, shared driveways, or private lanes intersecting
a residential or collector road are shown on Plate RD-11B of the Calvert
County Construction Standards for Roads, Streets, and Incidental Structures,
and shall conform to the following:
[1]
For grades less than 5.5%:
[a]
A one-hundred-foot vertical curve shall be used
with the point of vertical curvature (PVC) beginning at the edge of
shoulder to the point of vertical tangency (PVT) of the proposed road/lane/drive.
[b]
The maximum upslope from the edge of shoulder shall
be 1%. The maximum downslope from edge of shoulder shall be 2%.
[c]
The algebraic difference shall not exceed 5% for
residential or collector roads. The Algebraic difference shall not
exceed 10% for common access drives, shared drives and private lanes.
[2]
For grades between 5.5% and 10% (15% for private lanes and shared
drives):
[a]
A twenty-five-foot long landing grade shall be
provided from the edge of shoulder, with the point of vertical curvature
(PVC) beginning at the terminus of said landing grade for the proposed
road/lane/drive.
[b]
A two-hundred-foot vertical curve shall be used
for slopes between 5.5% and 7%. For grades between 7.01% and 10%,
a two-hundred-fifty-foot vertical curve shall be used.
[c]
The maximum upslope from the edge of shoulder (including
landing grade) shall be 3%. The maximum downslope from edge of shoulder
(including landing grade) shall be 2%.
[d]
The algebraic difference shall not exceed 10% for
residential, collector roads, common access driveways, shared drives
and private lanes.
[3]
Any deviation from design standards shall be on a case-per-case
basis and shall be requested in writing, and approved by the Director.
(f)
Vertical curves shall meet the minimum rate of curvature (K)
based on stopping sight distance per AASHTO.
(2)
The Director may approve a variance of not more than 10% of the standard
specified maximum grade where required by unusual topographic situations
and where public safety shall not be compromised.
A.
Minimum intersection sight distances shall be provided at all intersections
of existing County and proposed subdivision roads per AASHTO.
B.
Minimum stopping sight distances shall be provided at all intersections
of interior subdivision roads per AASHTO. No proposed road shall be
permitted to intersect an existing County road at a location that
would result in undue interference with or hazard to the free movement
of normal traffic.
C.
The radii of traffic curbs and pavement edges at intersections shall
be shown on the plans and governed by the following criteria:
(1)
At an intersection of residential roads, or of a residential road
with a collector road, the radius of the returns shall be 25 feet
to face of curb, or 35 feet to edge of pavement where no curbs are
provided.
(2)
At an intersection of collector roads, the radius of the returns
shall be 30 feet to face of curb, and 35 feet to edge of pavement
where no curbs are provided.
(3)
When any of the aforesaid road intersections involve the intersection
of a curbed traffic way with a noncurbed traffic way, the radius of
the returns shall be 35 feet.
(4)
At an intersection into a commercial/industrial subdivision, the
radius of returns shall be a minimum 50 feet to face of curb.
(5)
Where conditions warrant, i.e., intersection geometry and design
vehicle issues, the use of three centered (compound) curves may be
allowed subject to the Director's approval.
(6)
The Director will consider the use of smaller entrance radii upon
satisfactory evidence from the engineering professional representative
that the proposed entrance will provide unrestricted access to the
largest delivery vehicle that will serve the site. The largest vehicle
considered is a WB-67 unless otherwise specified by the Engineering
Division Chief.
D.
Center lines of traffic ways shall continue through intersections
without offsets, and shall intersect as nearly as possible at right
angles. Where various conditions make a right angle intersection impracticable,
the minimum deflection angle between the center line of a residential
road and the center line of any other road shall be 70°, and the
minimum deflection angle between the center line of a collector road
and the center line of another collector road shall be 75°.
E.
The minimum offset between center lines of public and private roads
shall be 200 feet. The minimum offset between a public road and a
commercial entrance shall be either 150 feet measured between their
respective center lines, or 125 feet from the edge of pavement along
the public road to the edge of pavement along the commercial entrance,
whichever is greater.
F.
Driveway entrances are not permitted within intersection fillets
and shall be offset a minimum of 60 feet from fillet to fillet.
G.
The design of the intersection should be such that a clear line of
sight shall be provided continuously within the triangle formed by
the following three points:
(1)
Intersection of center lines.
(2)
Location shall be:
(a)
Fifteen feet back of the edge of the travel way on gravel roads
and roads without paved shoulders at the proposed intersection location.
(b)
Fifteen feet back of the edge of paved shoulders on roads with
paved shoulders at the proposed intersection location.
(c)
Fifteen feet back of the edge of acceleration and deceleration
lanes on roads, having these at the proposed intersection location.
(3)
Minimum intersection sight distance measured from the intersection
and along the roadway center line to meet criteria as described in
AASHTO. Easements required to obtain sight distance shall be provided
and recorded on the record plat.
(4)
Visibility at intersections. On a corner lot in any zoning district,
nothing shall be constructed, erected, placed or allowed to grow in
such a manner as to obstruct vision between a height of 2 1/2
feet and eight feet in height above the center-line grades of the
intersecting streets in the triangular area formed by extending the
street lines (curb lines) of such corner lots to a point of intersection,
then measuring back from this point of intersection along each street
a distance of 25 feet to a point then connecting these two points
with a base line to form an isosceles triangle. Some objects may be
exempt, provided that the sight distance is adequate as determined
by the Department.
H.
Intersections with County collector and arterial roads shall be kept
to a minimum during the planning and layout of subdivisions and individual
lots. No more than 100 lots are to be accessed by a single subdivision
entrance or as determined by the Director. All intersections with
state roads shall conform to standards of the MSHA.
I.
Geometric features such as transition, acceleration, deceleration,
channelization, and by-pass lanes at an entrance to, or within, a
proposed development shall be required for roadways intersecting a
collector road. Use of these features shall be based upon the ultimate
size of the proposed development, and the potential function of the
roads.
J.
A twenty-five-foot minimum filleted truncated shall be provided at
all road intersections.
All roads shall be designed and constructed for the design speed
of the road. The design speed shall be 10 miles per hour over the
posted speed limit for roads posted over 50 miles per hour and five
miles per hour over the posted speed limit for roads posted at 50
miles per hour or below, or as determined by the Director. If the
roadway is not posted, according to Maryland State law, the speed
limit of the roadway is 30 miles per hour or as recommended and approved
by the Director.
A.
Roads shall be superelevated in accordance with the most recent AASHTO
standards.
B.
To superelevate, pavements shall be rotated around the center line,
except where such procedure would adversely affect adequate drainage
design. To avoid such a situation, the engineering professional representative
may rotate the superelevation around the inside or outside edge of
pavement, whichever affords the best drainage design.
C.
The designer must attempt to provide 2/3 of the transition accomplished
on tangent, and the remaining 1/3 accomplished on the curve.
D.
Horizontal curves of roads in subdivisions, commercial and industrial
areas are not generally superelevated. The use of superelevated roads
in these areas shall be approved by the Engineering Division Chief.
Standard details for culs-de-sac and permanent and temporary
T-turnarounds are shown on Plates RD-17A, RD-17B, RD-17C, RD-17D,
and RD-17E.
B.
T-turnaround.
(1)
If a road designed as a temporary dead-end road is to be extended
at a future date, a temporary T-turnaround shall be used in place
of a cul-de-sac. The length of the turnaround, or "T" portion, shall
be equal to the width of the right-of-way. Barricades and special
end treatments may be required on a case-by-case basis as directed
by the Director.
(2)
Permanent T-turnarounds shall be restricted to subdivisions serving
a maximum of 10 lots or as approved by the Director.
A.
Residential driveways shall be constructed in accordance with Plates
RD-15A, RD-15B, and RD-15C of the Calvert County Construction Standards
for Roads, Streets, and Incidental Structures as minimum requirements.
The permittee shall construct the driveway under a grading permit.
(1)
A maximum-landing grade of 8% from the edge of the shoulder to the
right-of-way line is permissible. The maximum grade of a driveway
at any point shall be 15%.
(2)
Driveways serving individual lots shall be constructed to a minimum
width of 10 feet, and final surface for all residential driveways
shall be constructed to a minimum thickness of four inches of compacted
CR-6 or approved equal. Driveway material shall be noted on plans
submitted for approval.
(3)
Shared driveways serving two lots shall be constructed to a minimum
width of 12 feet with the travel way constructed to a minimum thickness
of four inches of compacted CR-6 or approved equal.
(4)
Shared driveways accessing three or more lots that are served by
platted easement areas shall be constructed to a minimum width of
16 feet with the travel way constructed to a minimum thickness of
four inches of compacted CR-6 or approved equal. This standard does
not apply to newly platted lots served by a private lane.
(5)
Concrete driveway aprons are not acceptable within public rights-of-way
for open section roadways. Concrete aprons are acceptable in closed
section roadways.
(6)
All shared driveways shall require a recorded shared maintenance
agreement approved by the County Attorney.
B.
Driveway entrances to properties shall be constructed according to
the standard driveway design.
(1)
Driveway aprons shall not be constructed in, or partially in, any
intersection fillet.
(2)
All driveway entrances shall meet AASHTO sight distance criteria
and be certified thereto. In some cases, grading improvements shall
be necessary to conform to these standards. If, upon completion of
all feasible grading improvements, it is found that the lot still
does not meet the minimum sight distance criteria, the driveway entrance
shall then be placed to attain the optimum sight distance as approved
by the Engineering Division Chief.
(3)
The end of the driveway flare at the edge of paving shall not extend
beyond the perpendicular projection from the edge of paving to the
property corner at the right-of-way.
C.
Residential lots shall be limited to one driveway entrance onto County
roads or as determined by the Director upon written request.
Commercial and industrial entrances shall be constructed in
accordance with MSHA standards, or as shown on Plate RD-13B.
A.
Every roadway and residential subdivision shall be provided with
storm drains, culverts, drainageways, or other means of conveyance
adequate to collect and dispose of all water originating on or flowing
across the roads and property without inundating or damaging roads,
lots, or other properties.
B.
Drainage facilities shall be designed in accordance with Part 4, Storm Drainage Design Criteria, of this chapter.
C.
All state and County erosion and sediment control requirements shall
be strictly complied with at all times during construction.
D.
Floodplain District. Development of designated floodplain areas designated
by mapping or elevation shall be restricted to the uses specified
in the Calvert County Zoning Ordinance and in accordance with erosion
and sediment control plans approved by the United States Department
of Agriculture/NRCS.
A.
Embankment.
(1)
Embankments shall be formed of suitable material obtained from roadway,
structure, borrow and other excavation, and it shall be placed, processed
and compacted to the lines and grades shown on the plans and in accordance
with Section 204 of Maryland Department of Transportation, State Highway
Administration, Standard Specification for Construction and Materials.
(2)
For areas where the embankment is to be made three feet or more in
depth, trees and stumps shall be cut off as close to the existing
ground as is practical, but not to exceed 12 inches above the ground
surface. Near the toe of embankment slopes, none of the stumps or
trees shall extend above a point one foot beneath the slope surfaces.
In addition, brush, rubbish, debris, and wood shall be removed prior
to placement of fill.
(3)
For areas where the embankment is to be made less than three feet
in depth, all trees, stumps, roots, brush, matted roots, and debris
shall be removed, grubbed, or blasted from the existing ground prior
to placement of fill, and disposed of at an approved facility. In
the event that the embankment is two feet or less in depth, these
materials shall be grubbed in the same manner required where excavation
is to be made.
(4)
Within areas to be excavated, said areas shall be cleared and grubbed.
All imbedded stumps, root mats, etc., shall be removed to a depth
of not less than one foot below the subgrade or slope surfaces. All
depressions made below the subgrade or slope surfaces by the removal
of stumps or roots shall be refilled with materials suitable for embankment
and shall be compacted in conformity with the requirements of this
chapter.
B.
Subgrade.
(1)
This work shall consist of the preparation, protection, and maintenance
of the subgrade prior to the construction of succeeding courses in
accordance with the current Maryland Department of Transportation,
State Highway Administration Standard for Construction Materials.
(2)
All soft and unstable material and any other portions of the subgrade
that shall not properly compact shall be removed, disposed of, replaced
with suitable material, and compacted. The material shall be proof
rolled and approved by the inspector before subsequent material is
placed.
(3)
After roadway excavation and embankments have been completed, the
subgrade shall be fine graded and compacted.
C.
Subbase. Subbase shall be placed in accordance with Section 3 (Road
Standard Detail Plates and Pavement Section Plates RD-12 and RD-12A).
D.
Base and surface pavement. Base and surface pavement shall be placed
in accordance with Section 3 (Road Standard Detail Plates and Pavement
Section Plates RD-12 and RD-12A).
E.
Sidewalks.
(1)
Sidewalks may be required where standard combination curb and gutter
is built, and where otherwise considered necessary by the Director
or where required by the Calvert County Zoning Ordinance or Town Center
Zoning Ordinances.
(2)
Maintenance agreements are required for all sidewalks proposed within
a public right-of-way. Grants of perpetual easement to the public
and maintenance agreements shall also be provided for sidewalks adjacent
to but outside a public right-of-way when the sidewalks are for public
use.
(3)
Sidewalks in residential areas shall be a minimum of five feet in
width as shown on Plates RD-20A and RD-20B, unless otherwise specified
by the Director.
(4)
Along open-section roadways, sidewalks shall be located a minimum
of 10 feet off the edge of pavement.
(5)
Sidewalks are to be Portland cement concrete, MSHA Mix No. 3, Section
902.10.03, reinforced with 6 x 6 10/10 W.W. Mesh (6 x 6 W 1.4/W
1.4) unless otherwise required in the Town Center Zoning Ordinance,
constructed over six inches minimum of graded aggregate base.
(6)
Sidewalk geometry and traffic way crossings shall be designed to
meet or exceed the minimum requirements set forth by the current Americans
with Disabilities Act standards.
F.
Road signs. Road name, regulatory, warning, and guide signs shall
be erected by the permittee on all County roads. These signs shall
show direction, warning, and road names of intersecting roads, and
shall comply with the current edition of the MUTCD. All private road
name signs shall have a blue background with white letters to illustrate
a non-County-maintained road. No signs shall be installed within the
public right-of-way without prior approval by the Department.
G.
Traffic barriers.
(1)
Traffic barriers with proper signage shall be erected on all new
roadways at points of extreme hazard to a vehicle leaving the traveled
portion of the traffic way, and at the end of permanent or temporary
T-turnarounds. Generally, potential hazards develop at fills over
eight feet in vertical depth from the edge of the shoulder to the
toe of the slope when the slope ratio is steeper than 4:1, and for
fills greater than 15 feet regardless of slope. Traffic barriers and
other end of road treatments may also be required at other locations
at the discretion of the Director.
(2)
Traffic barriers shall be placed as shown with typical roadway sections.
The type of traffic barrier to be used shall be traffic barrier W
beam. Where traffic way construction ends in fill areas, traffic barrier
W beam barricades shall be erected.
(3)
The State of Maryland, Department of Transportation, State Highway
Administration Standards for Highway and Incidental Structures shall
be used for traffic barriers, barricades, and end treatments.
(4)
Material shall be per Section 612 of the Maryland Department of Transportation,
State Highway Administration Standard Specification for Construction
and Materials.
H.
Curb and gutter.
(1)
Curb and gutter shall be required in all urban residential subdivisions
and town centers where sidewalks are required along public roads.
(2)
At the discretion of the Director, curb and gutter shall be required
in residential subdivisions and commercial development where conditions
warrant, i.e., soil conditions, topography, or volume of runoff.
I.
Shoulders. When applicable, shoulders shall be earthen or paved per
the detailed standard plates contained herein.
J.
Valley gutters. Valley gutters shall be used only when approved by
the Engineering Division Chief but normally shall be permitted where
the approach road is a residential local road, provided that the rate
of water flow across the intersection does not exceed two cubic feet
per second.
K.
Bicycle pathways.
(1)
Hiker/bicycle pathways shall be constructed when required as part
of the development review and approval process by the Planning Commission.
Construction standards shall be designed by the engineering professional
representative, and approved by the Director.
(2)
Bicycle pathways may be located within the roadway pavement, separate
from the traveled way but within the right-of-way, or within their
own right-of-way such as through open areas.
(3)
Signing and marking shall be required in accordance with the MUTCD.
L.
Lighting. Maintenance agreements between the County and property
owners are required for all lighting proposed within a public right-of-way.
M.
Street trees interior to subdivisions.
(1)
Street trees shall be provided for new development projects in accordance
with the Calvert County Zoning Ordinance applicable to commercial
and residential development within Calvert County.
(2)
Street trees shall be planted outside of the road right-of-way. Species
are to be selected from the current Zoning Ordinance and the current
Rural Design Manual for the applicable condition. In general, species
should be varied for texture, color and form and selected to be compatible
with the scale of the roadway, intersections, adjacent improvements,
and any underground or overhead utilities.
(3)
Planted trees shall be installed using the general spacing guidelines
in Table 3-1 to maintain safety and prevent interference with utility
structures and appurtenances. Street trees shall not obstruct or obscure
any traffic control device, streetlighting, signage or sight distance.
|
Table 3-1
| |
|---|---|
|
General Spacing Guidelines
| |
|
Intersection
|
30 feet
|
|
Traffic or directional sign
|
25 feet
|
|
Light or utility pole
|
25 feet
|
|
Entrance drive or alley
|
10 feet
|
|
Drain or drain inlet structure
|
15 feet
|
|
Open space or stormwater management access easement
|
15 feet
|
|
Underground utility
|
15 feet
|
(4)
The species, ultimate size of the tree and the canopy desired should
be compatible with the size of the right-of-way and the road classification.
Deep-rooted trees are encouraged, and trees shall be selected so that
the potential root spread does not obstruct paving, curb, sidewalks,
ditch lines, traffic control devices, utilities, street lighting,
or other facilities necessary to the infrastructure of the subdivision.
Trees shall be selected to survive the environmental stresses of the
proposed location.
(5)
Planting plans shall be reviewed by Community Planning and Building.
Please refer to the Rural Design Manual.
N.
Landscaping. Regulations governing the installation of landscaping
are contained in the current Zoning Ordinance and the current Rural
Design Manual. However, no landscaping shall be planted in the shoulder
areas or within five feet of a ditch.
A.
The road shall be constructed per Plate RD-3A of the Calvert County
Construction Standards for Roads, Streets, and Incidental Structures.
B.
The road shall be constructed in accordance with an approved plan
under a public works agreement.
C.
The issuance of building permits and use and occupancy permits will
depend upon Bonding Method A or B.
A.
All family conveyance lots shall provide access to either state,
County or privately owned roads. If access is on a state road, a permit
is required from the MSHA.
B.
A private access easement or right-of-way shall be provided when
serving one to five building lots per Plate RD-1A of the Calvert County
Construction Standards for Roads, Streets, and Incidental Structures.
C.
(Reserved)
D.
Rights-of-way created within the property parcel being subdivided
shall meet the current standards of the Calvert County Zoning Ordinance.
E.
(Reserved)
F.
The proposed road access shall be private, non-County-owned or -maintained.
The permittee shall be responsible for providing for road construction.
Road maintenance, including snow removal, repairs, and other improvements,
as well as road services normally provided by the County, shall be
the responsibility of all lot owners accessing the family conveyance
road. A recorded access and maintenance agreement shall be required
as part of the grading permit application submittal for the roadway.
G.
At the applicant's expense, the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
H.
If the private road exists, it shall be improved in accordance with
an approved plan under a grading permit. Building permits will be
issued for lots being served by the road once a public works agreement
has been executed; however, use and occupancy permits will be held
until the base road is constructed, inspected, and approval is granted
by the Director.
I.
If the private road is to be newly constructed, it shall be constructed
in accordance with an approved plan under a public works agreement.
Building permits will be issued for lots being served by the road
once a public works agreement has been executed; however, use and
occupancy permits will be held until the base road is constructed,
inspected, and approval is granted by the Director.
J.
If there is a desire to make this right-of-way or easement a County
road, it shall be upgraded to County road standards as set forth in
the current ordinance and current subdivision regulations in effect
at the time of said upgrading.
K.
Family conveyance roadways in excess of 500 linear feet shall provide
a thirty-five-foot long turnout. Additional turnouts may be required
based on the length of roadway. See Turnout Detail on Plate 1A of
the Calvert County Construction Standards for Roads, Streets, and
Incidental Structures.
A.
Access to the development shall be provided by a state or County
road. If access is on a state road, a permit is required from the
MSHA.
B.
Private roads in the Farm and Forest District shall meet the standards
on Plate RD-1A of the Calvert County Construction Standards for Roads,
Streets, and Incidental Structures.
C.
The private road shall serve a maximum of seven lots.
D.
The proposed road access shall be private, non-County-owned or -maintained
and shall not be petitionable to the County for maintenance. A notation
of such restriction shall be placed on the plat and signed by the
property owners and shall remain in effect in perpetuity. The permittee
shall be responsible for providing for road construction. Road maintenance,
including snow removal, repairs, and other improvements, as well as
road services normally provided by the County, shall be the responsibility
of all lot owners accessing the private road. A recorded shared maintenance
agreement shall be required as part of the public works agreement
submittal.
E.
At the applicant's expense, the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
F.
The private road shall be constructed in accordance with an approved
plan under a public works agreement.
G.
Building permits will be issued for lots being served by the road
once a public works agreement has been executed; however, use and
occupancy permits will be held until the base road is constructed,
inspected, and approval is granted by the Director.
H.
No lot or parcel in a subdivision subject to these regulations shall
be transferred until a plat recording has been completed per the subdivision
regulations, a public works agreement for the road improvements has
been executed, and the base road approval of the platted roads has
been completed by the permittee and approved by Project Management
and Inspections.
A.
Common access driveways shall provide connection, like a family conveyance,
to a state or County road. If access is on a state road, a permit
is required from the MSHA. Common access driveways are not required
where accessing an interior subdivision street, as classified by the
Department.
B.
Construction standards are located on Plate RD-16 of the Calvert
County Construction Standards for Roads, Streets, and Incidental Structures.
C.
The proposed private access shall serve a maximum of seven lots.
D.
The proposed road access shall be private, non-County owned or -maintained,
and shall not be petitionable in perpetuity to the County for maintenance.
A notation of such restriction shall be placed on the plat and signed
by the property owners. The permittee shall be responsible for providing
for road construction. Road maintenance, including snow removal, repairs,
and other improvements, as well as road services normally provided
by the County, shall be the responsibility of all lot owners accessing
the common access driveway. A recorded shared maintenance agreement
shall be required as part of the public works agreement submittal.
E.
At the applicant's expense the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
F.
Common access driveways shall be constructed in accordance with an
approved plan under a public works agreement.
G.
Building permits will be issued for lots being served by the road
once a public works agreement has been executed; however, use and
occupancy permits will be held until the base road is constructed,
inspected, and approval is granted by the Director.
H.
No lot or parcel in a subdivision subject to these regulations shall
be transferred until a plat recording has been completed per the subdivision
regulations, a public works agreement for the road improvements has
been executed, and the base course of the platted roads has been completed
by the permittee and approved by Project Management and Inspections.
A.
Private road access to the development shall be provided by a state
or County road. If access is on a state road, a permit is required
from the MSHA.
B.
Construction standards are located on Plate RD-8B of the Calvert
County Construction Standards for Roads, Streets, and Incidental Structures.
C.
The proposed privately owned road shall serve a maximum of seven
lots.
D.
The proposed road access shall be private, non-County-owned and -maintained
and shall not be petitionable in perpetuity to the County for County
maintenance. A notation of such restriction shall be placed on the
plat and signed by the property owners. The permittee shall be responsible
for providing for road construction. Road maintenance, including snow
removal, repairs, and other improvements, as well as road services
normally provided by the County, shall be the responsibility of all
lot owners accessing the private road. A recorded shared maintenance
agreement shall be required as part of the public works agreement
submittal.
E.
At the applicant's expense, the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
F.
The private road shall be constructed in accordance with an approved
plan under a public works agreement.
G.
Building permits will be issued for lots being served by the road
once a public works agreement has been executed; however, use and
occupancy permits will be held until the base road is constructed,
inspected, and approval is granted by the Director.
H.
No lot or parcel in a subdivision subject to these regulations shall
be transferred until a plat recording has been completed per the subdivision
regulations, a public works agreement for the road improvements has
been executed, and the base course of the platted roads has been completed
by the permittee and approved by the Director.
A.
Private lane access shall be provided to meet the standards of this
chapter.
B.
The travel way shall be stabilized a minimum 16 feet wide with CR6
or bank run gravel, or an approved alternate material. Private lanes
shall meet the standards on Plate RD-1B of the Calvert County Construction
Standards for Roads, Streets, and Incidental Structures.
C.
Maximum grade for private lanes shall be 10%.
D.
The proposed private lane shall serve a minimum of three lots and
a maximum of seven lots.
E.
The proposed private lane shall have a thirty-foot minimum right-of-way.
F.
The proposed private lane shall be a maximum length of 400 feet.
G.
Private lane access connection to an existing County or state road
shall be in conjunction with a common access drive per Plate RD-16
of the Calvert County Construction Standards for Roads, Streets, and
Incidental Structures. If access is on a state road, a permit is required
from the MSHA.
H.
The proposed lane shall be private, non-County-owned and -maintained
and shall not be petitionable in perpetuity to the County for County
ownership, or for County maintenance. A notation of such restriction
shall be placed on the plat and signed by the property owners. The
permittee shall be responsible for providing for road construction;
and the lot owners shall be responsible for maintenance including
snow removal and repairs, as well as other improvements and road service
normally provided by the County. A recorded shared maintenance agreement
shall be required as part of the public works agreement submittal.
I.
At the applicant's expense, the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
J.
The private lane shall be constructed in accordance with an approved
plan under a public works agreement.
K.
Building permits will be issued for lots being served by the road
once a public works agreement has been executed; however, use and
occupancy permits will be held until the base road is constructed,
inspected, and approval is granted by the Director.
L.
No lot or parcel in a subdivision subject to these regulations shall
be transferred until a plat recording has been completed per the subdivision
regulations, a public works agreement for the road improvements has
been executed, and the base road approval of the platted roads has
been completed by the permittee and approved by Project Management
and Inspections.
A.
Serviceable roads are defined as roads accessing existing homes and
having a good history of maintenance as verified by the County representative.
B.
Access to the development shall be provided by a state or County
road. If access is on a state road, a permit is required from the
MSHA.
C.
An existing roadway with a minimum width of 12 feet and four inches
of compacted CR-6 or approved equal is required for issuance of a
building permit.
D.
A grading permit may be required for improvements to the road.
E.
At the applicant's expense, the private road shall be posted
with a road name sign marked with a blue background with white letters
to illustrate a non-County-maintained road.
For commercial (retail sales) or agribusiness developments on
unsubdivided property requiring site plan approval, the applicant
shall demonstrate adequate access to the site, and that this access
is specifically adapted to the uses anticipated and take into account
existing and proposed uses in the vicinity. The minimum adequate access
shall be a twenty-foot-wide roadway surfaced with a minimum of six
inches of graded aggregate base gravel (GAB).
A.
Private road construction or reconstruction in subdivisions created
prior to the adoption of the ordinance on October 12, 1976, and platted
before the adoption of the Calvert County Zoning Ordinance shall be
in accordance with Plate RD-1A of the Calvert County Construction
Standards for Roads, Streets, and Incidental Structures.
B.
Subdivisions meeting these criteria shall enter into road construction
agreements with the Board which result in a variance set forth in
the ordinance as noted above, provided that all of the following conditions
have been met:
(1)
Said subdivision shall have been platted before the adoption of the
initial Calvert County Zoning Ordinance.
(2)
Said subdivision contains interior private roads not contiguous to
public County roads.
(3)
There exists a homeowners' association in said subdivision with
membership by a majority of the homeowners within the subdivision.
(4)
There is an exclusive escrow mechanism set up for the collection
of fees for the maintenance and upkeep of infrastructure, including
but not limited to stormwater management facilities and other amenities.
The funds in this escrow account shall only be used for the purpose
stated herein.
(5)
Said subdivision has an established road maintenance program as well
as a history of reasonable road maintenance.
C.
Upon meeting the above conditions, the road construction agreement
to be entered into shall serve as guidelines, and shall be binding
on both the County and the homeowners' association. The agreement
shall provide:
(1)
The homeowners' association shall be issued a grading permit
for road construction after submitting and receiving approval of a
written specification plan describing the work to be accomplished,
or a road construction plan, both which should outline the sediment
control practices to be applied and the road typical sections.
(2)
Under this grading permit, the homeowners' association shall
be allowed to construct, the platted roadways specified in the description
of work. In addition, the homeowners' association shall be responsible
for the maintenance of any of the platted roadways constructed by
others.
(3)
The County shall provide inspection services under the grading permit.
(4)
Prior to issuance of use and occupancy permits, the roadway shall
be constructed per Plate RD-1A, and inspected in accordance with the
ordinance with the exception of surface paving.
(5)
The homeowners' association shall agree that Calvert County
shall not be required to accept the roads into the County maintenance
system until such time as the roads meet County specifications, or
are put into a road tax district.
(6)
The homeowners' association shall agree to provide all maintenance,
including snow removal, to the constructed roads within the subdivision.
Unless otherwise prohibited by a recorded land instrument, residents
of existing, privately owned rights-of-way are eligible to petition
the Board to become a publicly owned and maintained roadway through
the Road Tax District program. The Road Tax District Program and the
process for petitioning is described in the Md. Ann. Code, Article
25, § 155a.[1] If the petition is approved, the roadway must be constructed
according to this chapter.
[1]
Editor's Note: Article 25 of the Annotated Code of Maryland
was repealed by Acts 2013, c. 119, effective 10-1-2013; see now § 12-529
of the Local Government Article of the Annotated Code of Maryland.
All proposed plats that include abandonment of public or privately
owned rights-of-way shall be reviewed by the Department, and a public
hearing before the Board for the abandonment of said public or private
rights-of-way shall be requested unless otherwise approved by the
Director. All proposed abandonments shall be accompanied by a metes
and bounds description of the portion of right-of-way to be abandoned,
as well as a plat exhibit to include bearings and distances. Requirements
for the public hearing request are detailed in the Annotated Code
of Maryland.
