[CC 1983 §43.400; Ord. No. 04-44, 9-16-2004; Ord. No.
08-33, 9-4-2008]
A.
Streets
shall be completed in accordance with the plans, profiles, specifications
and cross sections prepared for the subdivider by a registered professional
engineer and approved by the City.
1.
The streets shall be surfaced to a minimum width according to the type of street, as specified in Section 405.240.
2.
Curbs and gutters shall be installed along the edges of all newly
constructed streets, and shall be of concrete construction a minimum
of eighteen (18) inches in width and not less than six (6) inches
in thickness.
3.
Prior to the construction of street or alley pavements, adequate
surface and subsurface drainage facilities shall be installed by the
subdivider. Pipe used for drainage purposes shall be of bituminous
coated corrugated metal, reinforced concrete or extra strength vitrified
clay of an approved design, size and strength to meet the requirements
of the specific conditions which may be encountered. Minimum diameters
of pipe to be used shall be as follows:
4.
All construction shall be completed in accordance with the specific
conditions in the agreement for improvements and the accepted plans
and specifications and in a manner acceptable to the authorities having
jurisdiction. When changes from the accepted plans and specifications
become necessary during construction, written approval from the authorities
having jurisdiction shall be secured prior to the execution of such
changes.
5.
Adequate provision for the maintenance of all street improvements
shall be made by dedication to and acceptance for maintenance by the
local authorities having jurisdiction or by any suitable means.
B.
Design Characteristics Of Street Pavement — Type Of Street.
|
Kind of Pavement
|
Arterial1/
|
Primary
|
Secondary
|
Neighborhood and Alley
|
|---|---|---|---|---|
|
CONCRETE
| ||||
|
Uniform design thickness
|
8¼ inches
|
7¼ inches
|
6½ inches
|
5 inches
|
|
Sub-base: Compacted aggregate crushed stone or as approved by
the City
|
8 inches
|
7 inches
|
7 inches
|
6 inches
|
|
1/
|
or as required to meet State Highway Department standards.
|
|---|---|
|
All Portland cement concrete must: Have air entrainment to bring
it to 6% air plus or minus 1½ percent; must have a slump of
2½ inches plus or minus ½ inch. The mix must be at least
a 6.4 bag mix for regular paving with a 28-day compressive strength
of at least 4,000 p.s.i. and minimum of 7.0 bag mix for concrete patching
or overlays with a 28-day compressive strength of at least 5,000 p.s.i.
Placement of concrete paving should be per the Missouri Standard Specifications
for Highway Construction.
| |
|
Kind of Pavement
|
Arterial1/
|
Primary
|
Secondary
|
Neighborhood
|
|---|---|---|---|---|
|
FLEXIBLE**
| ||||
|
Asphaltic surface course
|
4 inch
|
3 inch
|
3 inch
|
2 inch
|
|
Base: Bituminous coated aggregate
|
4 inch
|
4 inch
|
3 inch
|
3 inch
|
|
Sub-base: Compacted aggregate crushed stone or as approved by
the City
|
10 inch
|
9 inch
|
7 inch
|
6 inch
|
|
1/
|
or as required to meet State Highway Department standards.
|
|---|---|
|
**
|
For intersections and parking strips on residential streets,
use secondary street design characteristics.
|
[CC 1983 §43.310]
A.
Minimum
design and development standards for streets are as follows:
1.
The street and alley layout shall provide access to all lots and
parcels of land within the subdivision. Street jogs of less than one
hundred twenty-five (125) feet shall be avoided. Cul-de-sacs shall
not exceed five hundred (500) feet in length, unless necessitated
by site topography.
2.
Neighborhood streets shall be designed so as to discourage through
traffic.
3.
Proposed streets shall be adjusted to the contour of the land so
as to produce usable lots and streets of reasonable gradient.
4.
Certain proposed streets, where appropriate, shall be extended to
the boundary of the tract to be subdivided so as to provide for normal
circulation of traffic within the vicinity.
5.
Wherever there exists a dedicated or platted portion of a street
or alley adjacent to the proposed subdivision, the remainder of the
street or alley shall be platted to the prescribed width within the
proposed subdivision.
6.
Reserve strips controlling access to streets shall be prohibited
except where their control is definitely placed in the Board of Aldermen
under conditions approved by the Planning Commission.
7.
Widths of arterial, primary and secondary streets rights-of-way shall conform to the widths specified in Section 405.240.
8.
The minimum right-of-way of neighborhood streets, including marginal
access streets and cul-de-sacs, shall be fifty (50) feet. All cul-de-sacs
shall terminate in a circular right-of-way with a minimum diameter
of one hundred (100) feet under normal conditions or other arrangement
for the turning of all vehicles conveniently within the right-of-way.
For hillside areas, residential streets may be reduced to a right-of-way
width of forty (40) feet.
9.
In hillside areas where the general slope is sixteen percent (16%)
or greater and where a minimum pavement width of twenty-four (24)
feet is permitted, the Planning Commission may require the subdivider
to provide group parking bays providing one (1) off-street parking
space not less than nine (9) feet wide and twenty-four (24) feet deep
for each lot within each block frontage.
10.
Subdivisions that adjoin or include existing streets that do not
conform to the required widths shall dedicate additional width along
either or both sides of said street.
11.
Streets shall be laid out so as to intersect as nearly at right angles
as possible.
12.
At the intersection of other streets, the property line corners shall
be rounded by arcs with radii of not less than twenty (20) feet, or
chords of such arcs.
13.
At intersections of streets and alleys, the property line corners
shall be rounded by arcs with radii of not less than fifteen (15)
feet, or chords of such arcs.
14.
Intersection of more than two (2) streets at one point shall be avoided.
15.
Where parkways or special types of streets are involved, the Planning
Commission may apply special standards to be followed in the design
of such parkways or streets.
16.
Whenever the subdivision contains or is adjacent to a railroad right-of-way
or a highway designated as a "limited access highway" by the appropriate
highway authorities, provision shall be made for a marginal access
street, or a parallel street at a distance acceptable for the appropriate
use of the land between the highway or railroad and such streets.
17.
Horizontal visibility on curved streets and vertical visibility on
all streets shall be maintained along the center lines as follows:
20.
All changes in grade shall be connected by vertical curves of sufficient
radii to provide smooth transitions and required sight distances.
21.
Between reversed curves on arterial and primary streets there shall
be a tangent of not less than one hundred (100) feet and on secondary
and neighborhood streets such tangent shall be not less than forty
(40) feet. For hillside areas: between reversed curves on arterial
and primary streets there shall be a tangent of not less than fifty
(50) feet, and on secondary streets such tangents shall not be less
than twenty (20) feet.
23.
The minimum grade of any street gutter shall not be less than seventy-five
hundredths of one percent (0.75%).
24.
No street shall have a name which will duplicate or so nearly duplicate
as to be confused with the name of an existing street; unless the
proposed street is an extension of or in alignment with an existing
street, in which case the duplication shall be mandatory.
25.
Alleys shall be discouraged in residential areas but shall be included
in commercial and industrial areas where needed for loading and unloading
or access purposes; and, where platted, shall be at least twenty (20)
feet in width.
26.
Dead-end alleys shall be avoided where possible, but if unavoidable,
shall be provided with adequate turn-around facilities at the dead-end,
as determined by the Planning Commission.
[CC 1983 Plate I]
Cross sections of streets shall be designed and constructed
to the following standards:
|
Right-of-Way
| ||||||
|
Walk
|
Grass
|
Street Surface
|
Same
| |||
|
18 inch Curb and Gutter
|
Both Sides
| |||||
|
3 foot Min.
|
3 foot Min.
| |||||
|
1 2
|
3
|
4
| ||||
|
Cross Section
|
Right-of-Way
|
1
|
2
|
3
|
Full Width 4
|
Parking Data
|
|
Arterial Thoroughfare
| ||||||
|
A-A
|
80 — 100 foot
|
4 foot
|
4 foot
|
8 — 16 foot*
|
48 foot
|
No parking
either side
|
|
B-B
|
70 — 100 foot
|
4 foot
|
4 foot
|
6 — 21 foot*
|
42 foot
|
No parking
either side
|
|
Secondary Route
| ||||||
|
C-C
|
60 — 70 foot
|
2 foot
|
4 foot
|
4 — 9 foot*
|
40 foot
|
Parking on
both sides
|
|
D-D
|
50 — 60 foot
|
2 foot
|
4 foot
|
3 — 8 foot*
|
32 foot
|
Parking one
side only
|
|
E-E
|
40 — 60 foot
|
2 foot
|
4 foot
|
2 — 8 foot*
|
24 foot
|
No parking
either side
|
|
Local or Neighborhood Street
| ||||||
|
Neighborhood Street
|
40 — 50 foot
|
2 foot
|
4 foot
|
Varies
|
27 — 32 foot
|
Parking one side or both
|
|
Note: *Street trees to be planted in grade area (3) if space
is 6 foot wide or wider.
Source: General Planning and Resource Consultants, Inc.
| ||||||
