[Ord. No. 020227 §1(Art. II
§2.1), 2-27-2002]
A. The
classifications, extent, width, grade and location of all streets
shall conform to the Willard Comprehensive Plan and major street plan.
In any case where additional street right-of-way is required, the
additional right-of-way shall be split on both sides of the existing
right-of-way unless otherwise approved by the Board of Aldermen. Where
not shown, the arrangement and design standards of streets shall conform
to the provisions herein and/or the Missouri Department of Transportation
or Greene County where applicable. Streets which have an entry onto
a State highway will require approval from the Missouri Department
of Transportation. Streets which have an entry onto a Greene County
roadway will require County approval.
B. The
arrangement of streets in new subdivisions shall be coordinated with
existing, proposed and anticipated streets outside of the subdivision.
Provision shall be made for the continuation of existing streets in
adjoining areas.
C. When
a new subdivision adjoins a tract susceptible to being subdivided,
new streets shall be extended to the boundaries of such tract.
D. Streets
shall be related appropriately to the topography and street grades
shall conform as closely as practical to the original topography.
Street grades shall be in accordance with the requirements of this
Chapter.
E. Street
jogs with centerline offsets of less than one hundred fifty (150)
feet shall be prohibited.
F. Local
streets shall be designed so as to discourage through traffic. However,
provisions must be made for the extension of arterial and collector
streets into and from adjoining areas.
G. Permanent
dead-end streets or culs-de-sac shall be no longer than eight hundred
(800) feet and shall provide at the closed end a paved turnaround
having a minimum diameter of one hundred (100) feet to the face of
the outside curb and one hundred twenty (120) feet to the street right-of-way
line. See Drawing No. 1.
[Ord. No. 200810A, 8-10-2020]
H. Any
street dead-ended for access to an adjoining property or temporary
in nature because of authorized staged development shall be provided
with temporary, all-weather turnaround at the end of the street and
the use of such turnaround shall be guaranteed to the public until
such time as the street is extended. Every lot shall have access to
a road that provides reasonable ingress and egress for emergency vehicles
as well as for the intended use of the lot.
I. When
a subdivision abuts or contains an arterial street, the Planning and
Zoning Commission may require marginal access streets, reverse frontage
lots or other such treatment as may be necessary for adequate protection
of abutting properties and to provide separation of through and local
traffic.
J. Half-streets shall be prohibited except where such streets, when combined with a similar street (developed previously or simultaneously) on property adjacent to the subdivision, create a street that meets the right-of-way and pavement requirements of Chapter
400 Land Development Regulations and this Chapter. In such case, the developer shall dedicate that portion of land in the proposed subdivision that will complete the street right-of-way to the minimum standards.
[Ord. No. 020227 §1(Art. II
§2.2), 2-27-2002]
A. Clearing And Grubbing. Clearing and grubbing shall be performed
within the right-of-way and easement limits shown on the plans. All
timber, brush, roots, stumps, trees or other vegetation cut during
the clearing operations shall become the contractor's responsibility
to dispose of and shall be either removed from the project site or
satisfactorily disposed of on site.
B. Grading And Compaction. Streets shall be graded in accordance
with the lines and grade set by the engineer. Before placing curb
and gutter or base on the graded subgrade, the sub grade shall be
compacted to ninety-five percent (95%) standard proctor for a depth
of eight (8) inches and then shall be proof rolled with a fully loaded
pump truck in the presence of the engineer. Places that are found
to be loose or soft or composed of unsuitable materials, whether in
the subgrade or below it, must be dug out and refilled with compacted
crushed limestone base rock conforming to MoDOT 304 Type I stone.
All embankments or fills shall be made in eight (8) inch horizontal
lifts of suitable material. The fill shall be rolled with a sheepsfoot
roller after each lift, followed by a wheel roller, each weighing
not less than eight (8) tons.
C. Street Construction.
1. Arterial and collector streets. All arterial and
collector streets designed, extended, installed or developed within
the City shall meet the Greene County requirements for construction
of said streets and shall, at a minimum, be constructed with four
(4) inches of wet compacted limestone base conforming to Missouri
Department of Transportation (MoDOT) 304 Type I stone. The contractor
shall be responsible for keeping the stone base free of contamination
from clay or other foreign materials. An eight (8) inch compacted
asphalt base course shall meet MoDOT 301 specifications and a two
(2) inch compacted asphalt surface course shall meet MoDOT specifications
for Type 401-BP2 asphalt.
2. Other streets. All other streets designed, extended,
installed or developed within the City shall meet the Greene County
requirements for construction of said streets and shall, at a minimum,
be constructed with four (4) inches of wet compacted limestone base
conforming to Missouri Department of Transportation (MoDOT) 304 Type
I stone. The contractor shall be responsible for keeping the stone
base free of contamination from clay or other foreign materials. A
five (5) inch compacted asphalt base course shall meet MoDOT 301 specifications
and a two (2) inch compacted asphalt surface course shall meet MoDOT
specifications for Type 401-BP2 asphalt.
3. Installation and testing. All subgrade, crushed
limestone, asphalt base course and asphalt surface course shall be
installed and tested in accordance with Greene County and MoDOT requirements.
Tests shall be performed at a minimum rate of one (1) per one hundred
(100) lineal feet of roadway or a minimum of two (2) tests per day,
whichever is more frequent.
D. Pavement Section Variations. Where soils are unstable as
determined by the testing agency selected by the City, the developer
may be required to have soil tests run and a pavement design made
by a qualified soils engineer.
E. Curb And Gutter. All streets shall be constructed with concrete
curb and gutter. Concrete curb and gutter shall be constructed according
to the lines and grades established by the City Engineer. The concrete
shall meet MoDOT requirements. The curb and gutter shall be thirty
(30) inches wide and shall have a vertical curb face. Curb and gutter
shall be installed in conformance with Drawings No. 2 and No. 3 and
Greene County specifications for said improvements.
F. Cut And Fill Slopes. Cut and fill slopes shall not exceed
one-fourth (¼) inch per foot from the edge of the street pavement
or curb back to the street right-of-way line. It is preferred that
most slopes adjoining rights-of-way should be sloped no steeper than
a three to one (3:1) grade.
G. Street Grades. The minimum grade at any point on any street
shall be one-half of one percent (0.5%). The maximum grade on arterial
and collector streets shall be six percent (6%) and on minor or local
streets the maximum grade shall be ten percent (10%). However, in
no case shall streets be constructed with grades that create a substantial
danger to the public safety.
H. Street Intersections.
1. Intersections involving the junction of more than two (2) streets
shall be prohibited.
2. Streets shall intersect as nearly as possible at right angles. The
angle of intersection of street centerlines shall not be less than
seventy-five degrees (75°).
3. Except where no other alternative is practical or legally possible,
no two (2) streets may intersect with any other street on the same
side at a distance of less than four hundred (400) feet measured from
centerline to centerline of the intersecting street. When the intersected
street is an arterial, the distance between intersecting streets shall
be at least six hundred (600) feet.
4. Street curb intersections shall be rounded by a tangential arc with
a minimum radius of twenty-six (26) feet for intersections of two
(2) minor streets and thirty (30) feet for intersections involving
collector or arterial streets. Where substantial use is anticipated
by large vehicles, such as recreational vehicles or semi-trailers,
the curb radius shall be increased to accommodate the anticipated
use.
5. Design speed, sight distance, centerline radius.
|
Design Speed, Sight Distance, Centerline Radius
|
---|
|
|
Local Street
|
Collector and Arterial Streets
|
---|
|
Design speed
|
25 mph
|
30 mph
|
|
Minimum sight distance on vertical curve
|
100 feet
|
200 feet
|
|
Minimum centerline radius
|
100 feet
|
200 feet
|
I. Sight Distances At Intersections.
1. At no-stop intersections, the intersection shall be constructed so
that a person standing at a location on the centerline of any street
ninety (90) feet from the intersection of the street centerlines has
an unobstructed view to a point located on the centerline of the intersecting
street ninety (90) feet (in either direction) from the intersection
of the street centerlines. See Drawing No. 4.
2. At stop intersections the intersection shall be constructed so that
a person standing ten (10) feet back of the intersection right-of-way
lines on the stop street has an unobstructed view to a point on the
right-of-way line of the intersecting through street located seventy
(70) feet from the intersection of the right-of-way lines. See Drawing
No. 5.
3. At street connections to primary State roads the intersection shall
be constructed so that a person standing thirty (30) feet back of
the intersection right-of-way lines on the stop street has an unobstructed
view to a point on the right-of-way line of the intersecting through
street located one hundred fifty (150) feet from the intersection
of the right-of-way lines. See Drawing No. 6.
[Ord. No. 020227 §1(Art. II
§2.3), 2-27-2002; Ord. No. 071210 §§1 — 2, 12-27-2007]
A. All
driveway entrances and other openings onto streets within the City's
planning jurisdiction shall be constructed so that:
1. Vehicles can enter and exit from the lot in question without posing
any substantial danger to themselves, pedestrians or vehicles traveling
on abutting streets.
2. Interference with the free and convenient flow of traffic on abutting
or surrounding streets is minimized.
B. Driveway
approach wings shall be a minimum of four (4) feet with two (2) feet
on each side of the driveway. Driveway approach base shall be four
(4) inches of five-eighths (5/8) inch rock or equivalent and subgrade
shall be compacted to ninety-five percent (95%) Standard Proctor ASTM
D698. Driveway approaches shall be constructed of Portland concrete
where concrete curb and gutter exists and shall be six (6) inches
thick.
C. Where
drainage culverts are required, all driveway entrances and other openings
onto streets shall be constructed so that:
1. The culvert is at least twelve (12) inches in diameter with a minimum
of six (6) inches of surface cover over the culvert or as determined
by the City Public Works Director or City Engineer. Larger sizes may
be required as determined by the City Engineer.
2. The construction of the driveway surface over the culvert shall be
level with the top of the curve to maintain stormwater in the street.
D. The
size of culverts under City streets shall be approved by the City
Engineer and shall be constructed of reinforced concrete pipe.
[Ord. No. 020227 §1(Art. II
§2.4), 2-27-2002]
A. Sidewalks
shall be constructed on one (1) side of all streets and shall not
be built over water lines.
B. Sidewalks
shall be located within the street right-of-way, one (1) foot inside
the right-of-way line. Sidewalk subgrade shall be compacted to ninety-five
percent (95%) Standard Proctor ASTM D698. Sidewalks shall be constructed
of Portland concrete and shall be four (4) inches thick. Expansion
joints shall be provided every fifty (50) feet; contraction joints
at five (5) feet. Sidewalk widths shall be constructed to the following
applicable minimum standard:
[Ord. No. 200810A, 8-10-2020]
1. Sidewalks along minor streets shall be a minimum of five (5) feet
wide.
2. Sidewalks along collector and arterial streets and in the vicinity
of schools, recreation areas and other community facilities shall
be a minimum of five (5) feet wide.
3. Sidewalks in the vicinity of commercial districts or shopping centers
shall be a minimum of eight (8) feet wide.
C. Whenever the Board of Aldermen finds that a means of pedestrian access is necessary from the subdivision to schools, parks, playgrounds or other roads or facilities and that such access is not conveniently provided by sidewalks adjacent to the streets, the developer may be required to construct other walkway improvements to provide such access in compliance with the requirements of Chapter
400 Land Development Regulations, Article
XV, Required Public Improvements.
D. All
sidewalks shall be constructed up to each intersecting street and
wheelchair ramps shall be provided at intersections and other major
points of pedestrian flow. Where required, wheelchair ramps and depressed
curbs shall be constructed in accordance with the standards of the
Americans With Disabilities Act in effect at the time of construction.
E. A grass
planting strip shall be provided between the curb and the sidewalk.
[Ord. No. 020227 §1(Art. II
§2.5), 2-27-2002]
All utilities and improvements that are to be installed in street
rights-of-way shall be completed prior to construction of the street.
[Ord. No. 020227 §1(Art. II
§2.6), 2-27-2002]
A. All
subgrade, crushed limestone, bituminous plant mix base and bituminous
plant mix surface of all streets shall be installed and tested according
to the requirements of Greene County and the Missouri Department of
Transportation. Tests shall be performed at a minimum rate of one
(1) per one hundred (100) lineal feet of roadway or a minimum of two
(2) tests per day, whichever is more frequent. The City shall select
the location of these tests.
B. Meeting these standards and the tests referred to in Subsection
(A) shall be the responsibility and at the exclusive cost of the developer. The City shall employ the testing agency and the developer shall pay the costs.
C. If
any of the said tests are returned to the City showing a failure by
the developer to meet or surpass the standards established, then the
developer shall take such remedial measures as may be required by
the City.
D. The
developer shall give the City at least forty-eight (48) hours' notice
prior to commencing the installation.
E. Project Conditions.
1. Environmental limitations. Do not apply asphalt
materials if subgrade is wet or excessively damp or if the following
conditions are not met:
a. Prime and tack coats. Minimum surface temperature
of sixty degrees Fahrenheit (60°F), fifteen and one-half degrees
Celsius (15.5°C).
b. Asphalt base course. Minimum surface temperature
of forty degrees Fahrenheit (40°F), four degrees Celsius (4°C)
and rising at time of placement.
c. Asphalt surface course. Minimum surface temperature
of sixty degrees Fahrenheit (60°F), fifteen and one-half degrees
Celsius (15.5°C) at time of placement.
2. Pavement-marking paint. Proceed with pavement marking
only on clean, dry surfaces and at a minimum ambient or surface temperature
of forty degrees Fahrenheit (40°F), four degrees Celsius (4°C)
for oil-based materials, fifty degrees Fahrenheit (50°F), ten
degrees Celsius (10°C) for water-based materials and not exceeding
ninety-five degrees Fahrenheit (95°F), thirty-five degrees Celsius
(35°C).
F. Examination.
1. Verify that subgrade is dry and in suitable condition to support
paving and imposed loads.
2. Proof-roll subbase using heavy, pneumatic-tired rollers to locate
areas that are unstable or that require further compaction.
3. Proceed with paving only after unsatisfactory conditions have been
corrected.
G. Repairs.
1. Leveling course. Install and compact leveling course
consisting of hot-mix asphalt surface course to level sags and fill
depressions deeper than one (1) inch (25 mm) in existing pavements.
a. Install leveling wedges in compacted lifts not exceeding three (3)
inches (75 mm) thick.
2. Crack and joint filling. Remove existing joint filler
material from cracks or joints to a depth of one-fourth (¼)
inch (6 mm).
a. Clean cracks and joints in existing hot-mix asphalt pavement.
b. Use emulsified-asphalt slurry to seal cracks and joints less than
one-fourth (¼) inch (6 mm) wide. Fill flush with surface of
existing pavement and remove excess.
c. Use hot-applied joint sealant to seal cracks and joints more than
one-fourth (¼) inch (6 mm) wide. Fill flush with surface of
existing pavement and remove excess.
H. Surface Preparation.
1. General. Immediately before placing asphalt materials,
remove loose and deleterious material from substrate surfaces. Ensure
that prepared subgrade is ready to receive paving.
a. Sweep loose granular particles from surface of unbound-aggregate
base course. Do not dislodge or disturb aggregate embedded in compacted
surface of base course.
b. Mix herbicide with prime coat if formulated by manufacturer for that
purpose.
2. Prime coat. Apply uniformly over surface of compacted
unbound-aggregate base course at a rate of 0.15 to 0.50 gallon/square
yard (0.7 to 2.3 L/sq. m). Apply enough material to penetrate and
seal but not flood surface. Allow prime coat to cure for seventy-two
(72) hours minimum.
a. If prime coat is not entirely absorbed within twenty-four (24) hours
after application, spread sand over surface to blot excess asphalt.
Use enough sand to prevent pickup under traffic. Remove loose sand
by sweeping before pavement is placed and after volatiles have evaporated.
b. Protect primed substrate from damage until ready to receive paving.
3. Tack coat. Apply uniformly to surfaces of existing
pavement at a rate of 0.05 to 0.15 gallon/square yard (0.2 to 0.7
L/sq. m).
a. Allow tack coat to cure undisturbed before applying hot-mix asphalt
paving.
b. Avoid smearing or staining adjoining surfaces, appurtenances and
surroundings. Remove spillage and clean affected surfaces.
I. Hot-Mix Asphalt Placing.
1. Machine place hot-mix asphalt on prepared surface, spread uniformly
and strike off. Place asphalt mix by hand to areas inaccessible to
equipment in a manner that prevents segregation of mix. Place each
course to required grade, cross section and thickness when compacted.
a. Place hot-mix asphalt base course in number of lifts and thicknesses
indicated.
b. Place hot-mix asphalt surface course in single lift.
c. Spread mix at minimum temperature of two hundred fifty degrees Fahrenheit
(250°F), one hundred twenty-one degrees Celsius (121°C).
d. Begin applying mix along centerline of crown for crowned sections
and on high side of one-way slopes, unless otherwise indicated.
e. Regulate paver machine speed to obtain smooth, continuous surface
free of pulls and tears in asphalt-paving mat.
2. Place paving in consecutive strips not less than ten (10) feet (3
m) wide unless infill edge strips of a lesser width are required.
a. After first (1st) strip has been placed and rolled, place succeeding
strips and extend rolling to overlap previous strips. Complete a section
of asphalt base course before placing asphalt surface course.
3. Promptly correct surface irregularities in paving course behind paver.
Use suitable hand tools to remove excess material forming high spots.
Fill depressions with hot-mix asphalt to prevent segregation of mix;
use suitable hand tools to smooth surface.
J. Joints. Construct joints to ensure a continuous bond between
adjoining paving sections. Construct joints free of depressions with
same texture and smoothness as other sections of hot-mix asphalt course.
1. Clean contact surfaces and apply tack coat to joints.
2. Offset longitudinal joints, in successive courses, a minimum of six
(6) inches (150 mm).
3. Offset transverse joints, in successive courses, a minimum of twenty-four
(24) inches (600 mm).
4. Construct transverse joints as described in AI MS-22 "Construction
of Hot Mix Asphalt Pavements".
5. Compact joints as soon as hot-mix asphalt will bear roller weight
without excessive displacement.
6. Compact asphalt at joints to a density within two percent (2%) of
specified course density.
K. Compaction.
1. General. Begin compaction as soon as placed hot-mix
paving will bear roller weight without excessive displacement. Compact
hot-mix paving with hot, hand tampers or vibratory-plate compactors
in areas inaccessible to rollers. Complete compaction before mix temperature
cools to one hundred eighty-five degrees Fahrenheit (185°F), eighty-five
degrees Celsius (85°C).
2. Breakdown rolling. Complete breakdown or initial
rolling immediately after rolling joints and outside edge. Examine
surface immediately after breakdown rolling for indicated crown, grade
and smoothness. Correct lay down and rolling operations to comply
with requirements.
3. Intermediate rolling. Begin intermediate rolling
immediately after breakdown rolling while hot-mix asphalt is still
hot enough to achieve specified density. Continue rolling until hot-mix
asphalt course has been uniformly compacted to the following density:
a. Average density. Ninety-six percent (96%) of reference
laboratory density according to AASHTO T 245, but not less than ninety-four
percent (94%) nor greater than one hundred percent (100%).
4. Finish rolling. Finish roll paved surfaces to remove
roller marks while hot-mix asphalt is still warm.
5. Edge shaping. While surface is being compacted and
finished, trim edges of pavement to proper alignment. Bevel edges
while asphalt is still hot; compact thoroughly.
6. Repairs. Remove paved areas that are defective
or contaminated with foreign materials and replace with fresh, hot-mix
asphalt. Compact by rolling to specified density and surface smoothness.
7. Protection. After final rolling, do not permit vehicular
traffic on pavement until it has cooled and hardened.
8. Erect barricades to protect paving from traffic until mixture has
cooled enough not to become marked.
L. Installation Tolerances.
1. Thickness. Compact each course to produce the thickness
indicated within the following tolerances:
a. Base course. Plus or minus one-half (½) inch
(13 mm).
b. Surface course. Plus one-fourth (¼) inch
(6 mm), no minus.
2. Surface smoothness. Compact each course to produce
a surface smoothness within the following tolerances as determined
by using a ten (10) foot (3 m) straight edge applied transversely
or longitudinally to paved areas:
a. Base course. One-fourth (¼) inch.
b. Surface course. One-eighth (1/8) inch.
c. Crowned surfaces. Test with crowned template centered
and at right angle to crown. Maximum allowable variance from template
is one-fourth (¼) inch.
M. Field Quality Control.
1. Thickness. In-place compacted thickness of hot-mix
asphalt courses will be determined according to ASTM D 3549.
2. Surface smoothness. Finished surface of each hot-mix
asphalt course will be tested for compliance with smoothness tolerances.
3. In-place density. Testing agency will take samples
of uncompacted paving mixtures and compacted pavement according to
ASTM D 979 or AASHTO T 168.
a. Reference maximum theoretical density will be determined by averaging
results from four (4) samples of hot-mix asphalt paving mixture delivered
daily to site, prepared according to ASTM D 2041 and compacted according
to job-mix specifications.
b. In-place density of compacted pavement will be determined by testing
core samples according to ASTM D 1188 or ASTM D 2726.
(1)
One (1) core sample will be taken for every one thousand (1,000)
square yard (eight hundred thirty-six (836) square m) or less of installed
pavement, with no fewer than three (3) cores taken.
(2)
Field density of in-place compacted pavement may also be determined
by nuclear method according to ASTM D 2950 and correlated with ASTM
D 1188 or ASTM D 2726.
4. Remove and replace or install additional hot-mix asphalt where test
results or measurements indicate that it does not comply with specified
requirements.
[Ord. No. 020227 §1(Art. II
§2.7), 2-27-2002]
Parking Stall Layout Elements — Minimum Requirements
|
---|
|
Parking Layout Dimensions (in feet) for 9-Foot Stalls
at Various Angles
|
---|
Dimension
|
On diagram
|
90°
|
75°
|
60°
|
45°
|
30°
|
---|
Stall width, parallel to aisle
|
A
|
9.0
|
9.3
|
10.4
|
12.7
|
18.0
|
Stall length of line
|
B
|
18.5
|
20.0
|
22.0
|
25.0
|
34.1
|
Stall depth to wall
|
C
|
18.5
|
19.5
|
19.0
|
17.5
|
17.1
|
Aisle width between stall lines
|
D
|
26.0
|
23.0
|
16.0
|
12.0
|
10.0
|
Stall depth, interlock
|
E
|
18.5
|
18.8
|
17.5
|
15.3
|
13.2
|
Module, wall to interlock
|
F
|
63.0
|
61.3
|
52.5
|
44.8
|
40.3
|
Module, interlocking
|
G
|
63.0
|
61.0
|
51.0
|
42.6
|
36.4
|
Module, interlock to curb face
|
H
|
60.5
|
58.8
|
50.2
|
42.8
|
38.8
|
Bumper overhang (typical)
|
I
|
2.5
|
2.5
|
2.3
|
2.0
|
1.5
|
Offset
|
J
|
0.0
|
0.5
|
2.7
|
6.3
|
13.5
|
Setback
|
K
|
0.0
|
5.0
|
8.3
|
11.0
|
16.0
|
Cross aisle, one-way
|
L
|
14.0
|
14.0
|
14.0
|
14.0
|
14.0
|
Cross aisle, two-way
|
—
|
24.0
|
24.0
|
24.0
|
24.0
|
24.0
|
[Ord. No. 020227 §1(Art. II
§2.8), 2-27-2002]
A. Minimum
handicap parking space and access aisle dimensions shall be in conformance
with the following requirements:
1. Accessible parking spaces shall be at least ninety-six (96) inches
(2,440 mm) wide.
2. Except as provided in Subparagraph (3), access aisles adjacent to
accessible spaces shall be a minimum of sixty (60) inches (1,525 mm)
wide. Access aisles shall be part of an accessible route to the building
or facility entrance. Two (2) accessible parking spaces may share
a common access aisle. Parking spaces and access aisles shall be level
with surface slopes not exceeding one to fifty (1:50), two percent
(2%) in all directions.
3. One (1) in every eight (8) accessible spaces, but not less than one
(1), shall be a minimum of ninety-six (96) inches wide and shall be
served by an access aisle a minimum of ninety-six (96) inches (2,440
cm) wide and shall have a sign indicating "van accessible" mounted
below the "handicapped accessible" sign. Two (2) "van accessible"
spaces may share a single access aisle, if the sign is placed between
two (2) van accessible spaces.
B. Notwithstanding
any other provision of this Chapter, the developer shall be responsible
for complying with all applicable requirements of the Americans With
Disabilities Act as may be in effect at the time of construction.