HomeMy WebLinkAboutMAPLE HILL - Filed CS-COMMENT SHEETS - 2008-05-28gJrIII,Selected Issues Report
Cityof Fort Collins
Date:
4/15/2008
GILLESPIE FARM- ODP- #29-00 (MAPLE HILL)
SELECTION CRITERIA: Status = All
ISSUES:
Department: Traffic Operations Issue Contact: Eric Bracke
Topic: traffic
Number:1 Created:5/14/2003 Pending
Traffic Operations has no issues with the Maple Hill PDP, Final Compliance project.
Number:2 Created:7/15/2003 Pending
Traffic issues are resolved
Page 1
should be blocked by a vehicle on the street. As such, with
reasonable driver prudence, the corner clearance variance is not
detrimental the public health, welfare, and safety.
There are a few locations at the intersections of the collector
streets where lots are designed to be wider. Where the driveway will
be located on the smaller dimensional side of those lots, the
driveways must be located at the property line. This will meet the
corner clearance criteria.
Some end lots at the intersections of two local streets are
intended to have a duplex residential product. It is also desired
that the driveways to this duplex product be from both local streets.
Based upon review of available site plans, this will be possible while
still meeting the 50 foot minimum corner clearance for a local
residential street.
In conclusion, I believe that the variances to the intersection
spacing and the minimum corner clearance between driveways and street
intersections:
Are not detrimental to the public health, welfare, and safety,
Have no impact on the capital/maintenance requirements and costs.
Thank you for your consideration of these variance requests.
Sincete4Y,
a
Matthew J. Delich, P.E.
APPENDIX A
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APPENDIX B
COUNTY ROAD 52
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November 12, 2002 File: 0190LT02
Mr. Mike Herzig, P.E.
Fort Collins Engineering Department
P.O. Box 580
Fort Collins, CO 80522-0580
Dear Mike:
This letter was prepared for the Gillespie Farm ODP to request
variances to "Section 7.4 General Design Elements, Table 7-3, Access
Management," as contained in the Larimer County Urban Area Street
Standards (LCUASS), October 1, 2002. Specifically, the variances
pertain to unsignalized intersection spacing and corner clearance
between driveways/alleys and street intersections. A copy of Table
7-3 is provided'in Appendix A. The Gillespie Farm site plan is
provided in Appendix B.
No driveways intersect with CR11 or CR52 (both minor
arterials). The minimum intersection spacing along minor arterials
is 460 feet. The range of separation is 460-660 feet. There will
not be raised medians along either CR11 or CR52. The intersection
spacing exceeds 460 feet. There are two locations on CR11 and one
location on CR52, where the 660 foot separation is exceeded. None
of these locations will be detrimental to public health, welfare,
and safety_ They will also not have an impact on the capital/
maintenance requirements and costs.
The Gillespie Farm has an east/west collector street and a
north/south collector street that bisect the site. In addition,
there is a north/south collector street near the east edge of the
site. All of these are designated as minor collectors. The minimum
separation between intersections for a minor collector is 250 feet.
There are four locations along the central N/S collector and two
locations along the east N/S collector that are less than 250 feet.
These locations are labeled A, B, C, D, E, and F on the site plan
shown in Appendix B. Four of these locations (A,D,E,F) are at
intersections that are on the edges of the site (CR50E and CR52).
At the intersections with CR50E and CR52, the separate left -turn
lanes are not required but may be striped as such, if that is the
desire of the City. The variance regarding intersection spacing
will not be detrimental to the public health, welfare, and safety;
nor will it have an impact on the capital/maintenance requirements
of the City.
There are two other locations (B,C) along the central N/S
collector where the separation is less than 250 feet (B-190',C-
220'). From the available site plan, this cannot be corrected
without making street location changes on the east or west sides of
the N/S collector. However, the intersection spacing is large
enough not to cause operational concerns. This spacing will not be
detrimental to the public health, welfare, and safety; nor will it
have an impact on the capital/maintenance requirements of the City.
From the available lotting plan for the Gillespie Farm, there are
single family lots along the minor collector streets. The typical lot
width is 50 feet with some wider lots on corners. The corner clearance
for minor collector streets is 100 feet. There will be a few locations
along the two NIS collector streets that will not meet this corner
clearance. The lot widths are dictated by the density requirement in
"City Plan." It is only the end lots along the N/S minor collector
streets at the local street intersections that cannot meet the minimum
corner clearance standard. Single family detached dwelling units generate
approximately 10 trip ends per day and one trip end in the respective peak
hours. In the morning peak hour, the trip end is an exit from a driveway_
In the afternoon peak hour, the trip end is an entrance to a driveway. As
was demonstrated in a previous memorandum (10/12/01), daily traffic
volumes on the two collector streets that bisect the Gillespie Farm ODP
will be less than 1000 vehicles per day (vpd) . Daily traffic volumes on
the eastern minor collector street will range from 3300 to 1600 vpd.
Daily traffic volumes on the local streets will generally be less than 300
vpd. Traffic in the peak hours on these streets will be intermittent and
low. On the bisecting collector streets, the average gaps between
vehicles will be greater than 35 seconds. The probability of conflicts
at/near these intersections will be minimal. Driveways should be located
as far away from all of the subject intersections as possible. It is not
likely that there will be more than a one vehicle queue at any of the
subject intersections. Therefore, no driveway should be blocked by a
vehicle on the street. As such, with reasonable driver prudence, the
corner clearance variance is not detrimental the public health, welfare,
and safety.
There are a few locations at the intersections of the collector
streets where lots are designed to be wider. Where the driveway will be
located on the smaller dimensional side of those lots, the driveways must
be located at the property line. This will meet the corner clearance
criteria.
Some end lots at the intersections of two local streets are intended
to have a duplex residential product. It is also desired that the
driveways to this duplex product be from both local streets. Based upon
review of available site plans, this will be possible while still meeting
the 50 foot minimum corner clearance for a local residential street.
In conclusion, I believe that the variances to the intersection
spacing and the minimum corner clearance between driveways and street
intersections:
Are not detrimental to the public health, welfare, and safety,
Have no impact on the capital/maintenance requirements and costs.
Thank you for your consideration of these variance requests.
Sincerel
Matthew J. Deiich, P.E.
cc Eric Bracke
APPENDIX A
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APPENDIX B
COUNTY ROAD 52
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March 25, 2003 File: 0190LT03
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Mr. Dave Stringer, P.E.
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Fort Collins Engineering Department
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P.O. Box 580
Fort Collins, CO 80522-0580
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Dear Dave:
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This letter was prepared for the Gillespie Farm ODP to
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request variances to "Section 7.4 General Design Elements, Table
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7-3, Access Management," as contained in the Larimer County Urban
Area Street Standards (LCUASS), October 1, 2002. Specifically,
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the variances pertain to unsignalized intersection spacing and
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corner clearance between driveways/alleys and street
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intersections. A copy of Table 7-3 is provided in Appendix A.
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The Gillespie Farm site plan is provided in Appendix B.
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No driveways intersect with CRII or CR52 (both 2-lane
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arterials). The minimum intersection spacing along minor
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arterials is 460 feet. The range of separation is 460-660 feet.
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There will not be raised medians along either CR11 or CR52. All
intersection spacing exceeds 460 feet. There are two locations,
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one on CR11 and one on CR52, where the 660 foot separation is
exceeded. On CR11, the separation between the first intersection
south of CR52 and CR52 is approximately 700 feet. On CR52, the
separation between the first and second intersections east of
CR11 is approximately 820 feet. Separation greater than 660 feet
require a modification of the standard, not a variance. The
greater separation between intersections willnot present
operational concerns. None of these locations willbe
detrimental to public health, welfare, and safety. They will
also not have an impact on the capital/maintenance requirements
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costs.
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The Gillespie Farm has an east/west collector street and a
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north/south collector street that bisect the site. In addition,
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there is a north/south collector street near the east edge of the
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site. All of these are designated as minor collectors. The
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minimum separation between intersections for a minor collector is
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250 feet. There are four locations along the central N/S
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collector and two locations along the east N/S collector that are
less than 250 feet. These locations are labeled A, B, C, D, E,
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and F on the site plan shown in Appendix B. Four of these
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locations (A,D,E,F) are at intersections that are on the edges of
the site (CR50E and CR52) . At the intersections with CR50E and
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CR52, the separate left -turn lanes are not required but may be
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striped as such, if that is the desire of the City. The long
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range (2022) traffic forecasts at these four locations indicate
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less than or equal to 125 vehicles per hour in one direction. At
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a conservative peak hour factor of 0.4, the maximum number of
vehicles in one direction in one minute would be five. For
analysis purposes, this is one vehicle every 20 seconds. The analysis
indicates a delay of 10 seconds per approach vehicle, which is less
than the arrival rate. Therefore, it is concluded that the vehicle
queues will not extend to the next adjacent intersection, which is
approximately 200 feet from either CR52 or Country Club Road
(extended). It is therefore concluded that the variance regarding
intersection spacing will not be detrimental to the public health,
welfare, and safety; nor will it have an impact on the
capital/maintenance requirements of the City.
There are two other locations (B,C) along the central N/S
collector where the separation is less than 250 feet (B-190',C-220').
From the available site plan, this cannot be corrected without making
street location changes on the east or west sides of the N/S
collector_ However, the intersection spacing is large enough not to
cause operational concerns. The turning movements at the interior
local street intersections will be lower than those at the perimeter
intersections described in the previous paragraph. It is expected
that at a conservative peak hour factor condition, the approach
volumes would be on the order of one vehicle every 30 seconds. At
this arrival rate, the probability of two or more vehicles being in
the same area is very small. There is sufficient separation between
intersections so that conflicts would not likely occur. Therefore, it
is concluded that this spacing will not be detrimental to the public
health, welfare, and safety; nor will it have an impact on the
capital/maintenance requirements of the City.
From the available lotting plan for the Gillespie Farm, there are
single family lots along the minor collector streets. The typical lot
width is 50 feet with some wider lots on corners. The corner
clearance for minor collector streets is 100 feet. There will be a
few locations along the two N/S collector streets that will not meet
this corner clearance. The lot widths are dictated by the density
requirement in "City Plan." It is only the end lots along the N/S
minor collector streets at the local street intersections that cannot
meet the minimum corner clearance standard. Single family detached
dwelling units generate approximately 10 trip ends per day and one
trip end in the respective peak hours. In the morning peak hour, the
trip end is an exit from a driveway. In the afternoon peak hour, the
trip end is an entrance to a driveway. As was demonstrated in a
previous memorandum (10/12/01), daily traffic volumes on the two
collector streets that bisect the Gillespie Farm ODP will be less than
1000 vehicles per day (vpd). Daily traffic volumes on the eastern
minor collector street will range from 3300 to 1600 vpd. Daily
traffic volumes on the local streets will generally be less than 300
vpd. Traffic in the peak hours on these streets will be intermittent
and low. On the bisecting collector streets, the average gaps between
vehicles will be greater than 20 seconds. The probability of
conflicts at/near these intersections will be minimal. Driveways
should be located as far away from all of the subject intersections as
possible. It is not likely that there will be more than a one vehicle
queue at any of the subject intersections. Therefore, no driveway