Table 33. Minimum Number of Subdivision Access Points
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---|---|
# Lots
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Minimum Access Points
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0-49
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2
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50-149
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2
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150-299
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3
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300-499
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4
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500+
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1+ 0.7 per 100 lots
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Table 34. Dimensions for Driveways at Non-State Maintained
Roadways
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---|---|---|---|
Criteria
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Street Classification
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Nonresidential and
Multi-Family Driveway
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Service Driveway
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Driveway Throat Width
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Arterial Streets
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24-40'
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30-48'
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Collector Streets
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24-40'
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30-48'
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Local Streets
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24-36'
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28-40'
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Driveway Curb Radius
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Arterial Streets
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20-30'
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25-30'
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Collector Streets
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10-20'
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10-20'
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Local Streets
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10-20'
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10-20'
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Minimum Distance to Intersection Along Roadway
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Arterial Streets
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200'
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200'
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Collector Streets
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150'
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150'
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Local Streets
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50'
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100'
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Minimum Centerline Driveway Spacing Along Roadway
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Arterial Streets
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250'
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250'
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Collector Streets
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150'
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150'
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Local Streets
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100'
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100'
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Notes:
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1
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The requirements for Driveway Throat Width and Driveway Curb
Radius are for standard undivided two-way operation and may be varied
by the City Engineer if traffic volumes, truck usage, common driveways,
and other factors warrant such.
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2
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Minimum centerline spacing does not implicitly determine the
number of driveways allowed. Driveways served by deceleration lanes
may be spaced at closer intervals if approved by the City Engineer.
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3
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Distance measured from the intersection Right-of-Way line to
the centerline of the proposed driveway.
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4
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Nonresidential, multi-family and service driveways shall not
be permitted on Local Streets.
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Table 35. Required Driveway Stacking
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---|---|---|
Average Number of Parking Spaces per Driveway*
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Total Number of Parking Spaces**
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Minimum Stacking Length
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20-49
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20-49
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Landscape edge width +20'
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50-199
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50'
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200+
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75'
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50-199
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50-199
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75'
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200+
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100'
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200+
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200+
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100'
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Notes:
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1
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The average number of parking spaces per driveway is calculated
by dividing the total number of parking spaces by the number of commercial
and multi-family driveways. (Service driveways are not included in
the calculation.)
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2
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The total number of parking spaces is the sum of all spaces
accessible by a driveway or driveways both on-site and off-site. The
internal storage shall be separated from parking areas by a five-foot
(5') wide, raised curb island or median. Planting requirements for
the island or median shall be one (1) Small Tree and one (1) five-gallon
(5 Gal.) shrub for every fifteen (15) linear feet. Appropriate signage
(e.g. stop, yield, etc.) shall be placed for any vehicular cross movement
or internal circulation that intersects the ingress/egress circulation
beyond the required internal storage.
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Table 36. TIA Requirements
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---|---|---|---|
Examples
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Applicability
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Analysis Periods
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Notes
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Zoning
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Zoning requests and Thoroughfare Plan amendments, if no previous
traffic assessment was performed.
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All zoning requests for land uses that will generate 2,500 or
more vehicle trips per day or contain a density of 0.75 Floor Area
Ratio (FAR) or greater.
All zoning requests for single family residential development
with the following exemptions:
• Development density of six (6) dwelling units
per acre or less, or
• Special circumstances exist, as determined
by the City Engineer, such as:
-Impacts to other residential development from cut-through
traffic,
-Inadequate site accessibility,
-The implementation of the surrounding Transportation
Master Plan is not anticipated during the estimated time period of
the proposed development,
-Internal street or access system is not anticipated
to accommodate the expected traffic generation, or
-The development is outside the urban core of the
community.
Other zoning requests that do not meet the daily trip generation
threshold may also require a TIA if special circumstances exist, as
determined by the City Engineer, such as:
• Impacts to residential neighborhoods from
nonresidential development,
• Inadequate site accessibility,
• The implementation of the surrounding thoroughfare
plan is not anticipated during the estimated time period of the proposed
development,
• The proposed land use differs significantly
from that contemplated in the comprehensive plan, or
• The internal street or access is not anticipated
to accommodate the expected traffic generation.
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Analysis periods shall include build and no-build scenarios.
Assume full occupancy and buildout.
The analysis periods for a zoning TIA shall be:
• Opening year,
• 5 years after opening, and
• 10 years after opening.
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Study Area:
• All site access drives
• All signalized intersections or major unsignalized
street intersections within 1/2 to 1 mile of site boundary
• For certain projects the City may require
an enlarged study area. Land uses within the Study Area should include
recently approved or pending development adjacent to site.
Additional Requirements:
Depending upon specific site development characteristics of
the proposed development, one or more of the following elements may
also be required by the City Engineer as part of the TIA:
• An accident analysis,
• Sight distance survey,
• Traffic simulation,
• Queuing analysis, or
• Turn lane analysis.
Action:
The need for a TIA shall be determined by the City Engineer
based upon the results and recommendation from a Presubmission Meeting.
It shall be the responsibility of the Applicant to demonstrate
that a TIA should not be required.
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Development
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Site Plans, and Preliminary Plats or Final Plats, if no TIA
was previously performed.
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All development requests for land uses that will generate over
100 total trips during the AM or PM peak hour, or 750 daily trips.
An additional separate analysis may be required when site-generated
peak hour trip activity is different from that of the adjacent street
(weekday 7-9am, 4-6pm), as determined by the City Engineer. Such circumstances
may include, but not be limited to commercial/retail, entertainment
or institutional activity.
Development with 50-500 peak hour trips may require a TIA, as
determined by the City Engineer.
The City Engineer may waive the TIA for a Site Plan if a TIA
was performed with the zoning request and conditions listed in the
report are current.
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Analysis periods shall include build and no-build scenarios.
Assume full occupancy and buildout.
The analysis periods for a development TIA with >50 peak hour
driveway trips, or 100-500 total peak hour trips, shall be:
• Existing year,
• Opening year, and
• 5 years after opening
The analysis periods for a development TIA with >500 total peak
hour trips shall be:
• Existing year,
• Opening year,
• 5 years after opening*, and
• 10 years after final opening with full build
out
*TIA study not required if the traffic impacts of the project
are fully mitigated 10 years after opening with existing conditions
plus 5-year programmed improvements.
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Table 37. Criteria for Determining Study Update Requirements
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---|---|---|
Original Report
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Changes to the Original Proposed Development
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Access Changed* or Trip Generation Increased by >10%
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Access Not Changed and Trip Generation Increased by <10%
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Submittal
<2 years old
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Letter amendment required: Identify and report only analysis
conditions that changed.
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Letter documenting change (no other reports required).
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Submittal
>2 years old
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Prepare new study: Must meet all current TIA requirements.
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Prepare new study: Must meet all current TIA requirements.
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*Changed access includes proposed new access or refinement of
general access locations not specifically addressed in original proposed
development.
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