HomeMy WebLinkAboutWATERFIELD PUD - PRELIMINARY - 7-95B - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDYcontinue to operate acceptably. The recommended geometry is shown
in Figure 12.
In the long range future, all area roadways and
intersections are expected to operate acceptably. New street links
and mixed use districts, as described in the City Plan, will
moderate traffic volumes on various street segments. Transit
facilities, as described in the City Plan, and bicycle facilities,
as shown on Fort Collins Street Design Standards, will provide
alternative modes of transportation to residents of Waterfield PUD,
as well as, other developments in the area.
7
9
N
NO SCALE
LONG RANGE DAILY LINK VOLUMES Figure 14
C
CONIFER
N
Mixed -Use i
District
r �
EXTENSION
LONG RANGE GEOMETRY Figure 13
related to the mixed use activity center near the CR50/CR9E
intersection is a function of the City Plan and future development.
Specifics concerning operation in this area cannot be analyzed at
this time. With the enhanced road system in this area, operation
at the analyzed intersections will be acceptable. City Plan
documents show transit corridors in this area on the Timberline
Extension, Conifer. Street, Lemay Avenue, and Vine Drive. These,
along with bicycle facilities that are a part of the collector and
arterial roadway system, will provide the opportunity for
alternative means of transportation for the residents of Waterfield
PUD and other proposed/future developments in this area of Fort
Collins. Figure 13 shows a schematic of the long range geometry
at key intersections and along selected'roadways.
Figure 14 shows long range daily traffic forecasts on interior
streets and the external adjacent streets. These forecasts are
provided so that various street segments can be compared to
criteria contained in the new street design standards of the City
of Fort Collins. It is expected that streets within the Waterfield
PUD will meet local street volume criteria. A short segment of
Wood Duck Drive, north of Vine Drive, will exceed local street
volume criteria. However, this is due to the commercial land uses
in this area. It is expected that volumes will meet local street
criteria just north of the access to the apartment area. It is
expected that Merganser Drive will function as a collector street
when/if the street network is completed as described earlier. Both
Vine Drive and the Timberline Extension have volumes that fall into
the arterial street category.
V. CONCLUSIONS
This study assessed the traffic impacts of the development of
the Waterfield PUD on the short range (year 2003) and long range
(year 2015) street system in the vicinity of the proposed
development. As a result of this analysis, the following is
concluded:
- Waterfield PUD is a mixed use residential development,
comprised of 488 dwelling units, a small commercial center, a city
park, a day care facility, and an elementary school. This
development is expected to generate approximately 6130 daily
vehicle trip ends, 590 morning peak hour trip• ends, and 550
afternoon peak hour trip ends.
Based upon current traffic volumes and existing
geometry/control, all key intersections operate acceptably.
- In the short range, with development of the initial phase
of the `Waterfield PUD, all key intersections are expected to
1-1
A
TABLE 4
Long Range Peak Hour Operation
Level
of Service
Intersection
AM
Pli
Vine/Merganser (stop sign)
SB LT
C
C
SB RT
A
A
EB LT
A
A
Vine/Wood Duck (stop sign)
SB LT
B
-C
SB RT
A
A
EB LT
A
A
Vine/Apartment Access (stop sign)
SB LT/RT
B
B
EB. LT
A
A
CR9E/Senior Cottages Access (stop sign)
EB LT/RT
B
B
NB LT
A
A
CR9E/Garganey (stop sign)
EB LT/RT
B
B
NB LT
A
A
Lemay/Conifer (stop sign)
EB LT/T
C
F
EB RT
A
A
WB LT/T
F
F
WB RT
A
A
NB LT
A
A
SB LT
A
A
Lemay/Conifer (signal)
B
B
Conifer/New Road (stop sign)
EB LT
B
C
EB RT
A
A
NB LT
A
A
A
N
i
N
SHORT RANGE GEOMETRY Figure 12
TABLE 3
Short Range Peak Hour Operation
Level
of Service
Intersection
AM
PM
CR50/CR9E (stop sign)
NB LT
B
B
NB RT
A
A
WB LT
A
A
Vine/CR9E (all way stop)
NB
A
B
SB
B
A
EB
B
B
WB
A
A
Overall
A
B
Vine/Lemay (signal)
C
D
Vine/Merganser (stop sign)
SB LT
B
B
SB RT
A
A
EB LT
A
A
Vine/Wood Duck (stop sign)
SB LT
B
B
SB RT
A
A
EB LT
A
A
Vine/Apartment Access (stop sign)
SB LT/RT
B
B
EB LT
A
A
CR9E/Senior.Cottages Access (stop sign)
EB LT/RT
A
A
NB LT
A
A
CR9E/Garganey (stop sign)
EB LT/RT
A
A
NB LT
A
A
morning and afternoon peak hour traffic in the long range future
(2015).
IV. TRAFFIC IMPACTS AND ANALYSIS
Signal Warrants
As a matter of policy, traffic signals are not installed at
any location unless warrants are met according to the Manual on
Uniform Traffic Control Devices. Based upon the forecasted traffic
volumes, it appears that the Lemay/Conifer intersection may meet
peak hour signal warrants in the long range future. It is on the
threshold of meeting warrants, so both a signalized and
unsignalized analysis were conducted for the long range future
conditions.
Operation Analysis
Capacity analyses were performed on the key intersections in
the vicinity of the Waterfield PUD for both short range (year 2003)
future and long range (year 2015) future traffic conditions.
Using the traffic volumes shown in Figure 10, the key
intersections operate in the short range future, with the initial
phase of the Waterfield PUD, as indicated in Table 3. Calculation
forms for these analyses are provided in Appendix C. These
analyses assumed that the existing system and control continued to
be in place. With the additional traffic from the 392 dwelling
units and the commercial area in the initial phase of development,
all of the key intersections will operate acceptably, based upon
Fort Collins level of service criteria. It is recommended that
some geometric improvements be made at selected intersections.
Figure 12 shows the recommended lane geometry at the key
intersections. The CR9E/CR50 intersection should have separate
lanes for all movements. This is not due to the Waterfield PUD,
but rather the lanes are needed with the existing volumes. Future
developments, such as Richard's Lake PUD and Waterfield PUD, only
serve to reenforce the need for these lanes.
Using the traffic volumes shown in Figure 11, the key
intersections operate in the long range future (year 2015) as
indicated in Table 4. Calculation forms are provided in.Appendix
D. Seven key intersections are analyzed in the long range future.
The analyzed intersections are expected to operate acceptably. Two
intersections along Vine Drive are expected to be grade separated
by the year 2015. General designs are not available at this time
and are beyond the scope of this traffic study. The enhanced road
system will be designed to function acceptably. The. traffic system
5
AM / PM
! Rounded to the Nearest
5 Vehicles.
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Grade Separated Grade Separated
Interchange Interchange
TIMBERLINE
EXTENSION
LONG RANGE
TOTAL PEAK HOUR TRAFFIC
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Figure 11
AM / PM
Rounded to the Nearest
5 Vehicles.
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65/80
SHORT RANGE
TOTAL PEAK HOUR TRAFFIC
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Figure 10
AM/PM
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FULL DEVELOPMENT
PEAK HOUR SITE GENERATED TRAFFIC Figure 9
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AM / PM
C.R. 50--12/30
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SHORT RANGE
PEAK HOUR SITE GENERATED TRAFFIC Figure 8
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SHORT RANGE TRIP DISTRIBUTION Figure 6
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CORD. 50 ;
to Mixed -Use
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CONIFER k
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LONG RANGE TRIP DISTRIBUTION Figure 7
to calculate the trip generation. Non-residential land use codes
from Trip Generation, 5th Edition were as follows: Elementary
School (520), City Park (411), Gas/Convenience Store (845),
Specialty Retail Center (814), and Day Care (565). Table 2 shows
the daily and peak hour traffic from the Waterfield PUD. A vehicle
trip is defined as a one-way vehicle movement from a point of
origin to a point of destination.
Trip Distribution
Directional distributions were determined for the land uses
considered in this study. These distributions considered trip
attractions in the Fort Collins area, and existing travel patterns
in'the area. The short range trip distribution used in subsequent
analyses is shown in Figure 6. The long range trip distribution
is shown in Figure 7.
Background Traffic
' Background traffic is defined as the traffic that is and/or
will be on the area streets that is not related to the proposed
development. Future analysis years were 2003+ (short range) and
2015 (long range). This is a developing area of Fort Collins and,
as such, the traffic increases are largely dependent upon land
development. Background traffic was increased incrementally by 2.0
percent per year to estimate short and long range background
traffic. This growth rate was determined by reviewing various
transportation planning documents and the estimated increases in
housing and employment for traffic zones in this area.
Consideration was also given to other known developments, such as
the Hearthf ire PUD and the Richard's Lake PUD. In order to present
a conservative analysis, site related traffic was considered
supplemental to the increase in background traffic. Traffic
studies for other future developments may change traffic forecasts
slightly; however, the forecasts used are the best available at
this time.
Trip Assignment
Trip assignment is how the generated and distributed trips
are expected to be loaded on the street system. The assigned trips
are the resultant of the trip distribution process. Figure 8 shows
the assignment of the generated trips from the initial phase of the
Waterfield PUD. ' The Figure 8 assignment. assumes the existing
street system. Figure 9 assumes. that the future road system, shown
in Figure 3, is in place and aspects of the "City Plan" are
underway. Figure 9 is the full development site generated traffic
assignment. Figure 10 shows total morning and afternoon peak hour
traffic in the year 2003 short range future. Figure 11 shows total
4
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TABLE 1
1996 Peak Hour Operation
Level of Service
Intersection AM PM
CR50/CR9E (stop sign)
NB LT/RT A A
WB LT A A
Vine/CR9E (all way stop)
NB A A•
SB A A
EB A A
WB A A
Overall A A
Vine/Lemay (signal) B C
TABLE 2
Trip Generation
Daily
A.M.
Peak
P.M.
Peak
Land Use
Trips
Trips
Trips
Trips
Trips
in
out
in
out
Single Family Residential
1830
36
106
127
67
- 192 DU
Apartments - 176 DU
1110
19
58
55
32
Senior Cottages - 120 DU
340
10
11
19
14
Elementary School - 600
650
108
72
Nom
Nom
students
City Park - 6.46 Acres
20
Nom
Nom
1
1
Gas/C-store - 8 pumps
1300
40
40
54
54
Neighborhood Commercial
410
6.
3
20
20
- 10.0 KSF
Day Care - 100 Students
470
43
36
40
45
TOTAL
6130
262
328
316
233
Existing Operation
Using the traffic volumes shown in Figure 4 and the existing
control and geometry, the key intersections operate as indicated
in Table 1. Calculation forms for these analyses are provided in
Appendix B. As shown on Table 1, all intersections currently
operate acceptably. For evaluation purposes, acceptable level of
service is defined as level of service D or better during peak hour
conditions. Current levels of service in the area of the site
typically are B or better.
III. PROPOSED DEVELOPMENT
The Waterfield PUD is a mixed use residential development,
proposed north of Vine Drive and west of CR9E in Fort Collins. As
currently planned, it will have 488 residential units, a small
neighborhood commercial center, a city park, a day care facility,
and an elementary school. The commercial center is of a size that
is not expected to attract significant trips from outside this
development, except for passby traffic on Vine Drive. Actually,
some trips for convenience items may be captured within this
development. Figure 5 shows the site plan of the Waterfield PUD.
Site access is planned via Vine Drive and CR9E. Three accesses are
proposed to Vine Drive and two accesses are proposed to CR9E. In
the long range future, Merganser Drive will potentially become part
of the new north/south road mentioned earlier.
For analysis purposes, the initial phase of development of the
Waterfield PUD consists of the apartment area (176 D.U.), the
senior cottages (120 D.U.), half of the single family detached area
(96 D.U.), and the commercial center. This phase is intended to
begin in 1997. Actual development is a function of market
conditions; however, for traffic analysis purposes, completion of
the initial phase was assumed to occur between the years 2000-2005.
The initial phase traffic analysis assumed that the road system
shown in Figure 3 was not in place.
Trip Generation
Trip generation is important in considering the impact of a
development such as this upon the existing and proposed street
system. A compilation of trip generation information was prepared
by the Institute of Transportation Engineers and is presented in
Trip Generation, 5th Edition and the February 1995 Update. This
document was used to estimate the daily and peak hour vehicle trips
generated by the Waterfield PUD. Three residential land use codes
from Trip Generation, 5th Edition, Single -Family Detached Housing
(210), Apartment (220), and Retirement Community (250) were used
3
1996
a
h
n cnv v 52//763
N in a — /
/--19/23
6/23
46/77 ='
75/46
N
VINE
T
T
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d
'00001996
— 43/80
sa 147 C.R. 50 /— 82/60
109/33�
76/28
n a�
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W
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U
1996
N
n
ch � 2 9
'W —►- 66 879
18/39-Jf } I
57/69 — n v m
62/58�
cm
AM AM / PM
RECENT PEAK HOUR TRAFFIC
Figure 4
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Roads
The primary streets near the Waterfield PUD are Vine Drive,
County Road 9E (CR9E), Summit View Drive, and County Road 50
(CR50). Vine Drive is adjacent to the Waterfield PUD on the south.
It is an east -west street designated as an arterial street on the
Fort Collins Master Street Plan. Its existing cross section, in
this area, has one lane in each direction. There are some existing
residences along the north side of Vine Drive. There is a railroad
switching yard on the south side of Vine Drive.
County Road 9E is a north -south roadway extending from CR50
to the Vine Drive intersection. To the south of Vine Drive, it
becomes Summit View Drive. The "Northeast Area Transportation
Study" and the Fort Collins Master Street Plan show CR9E and Summit
View as arterial streets. These roads have a paved two .lane cross
section. These roads are intended to become part of the Timberline
Extension in the future.
County Road 50 is an east -west road designated as an arterial
on the Fort Collins Piaster Street Plan. CR50 is under the
administrative control of Larimer County to the east of CR11. It
has a two lane cross section with minimal shoulders.
Other roads of significance in the area are Lemay Avenue and
CR11. Figure 2 shows the street system in this general area. Most
of these roads have two lane cross sections. Neighborhood meetings
and staff meetings indicated that the existing road system will be
deficient in handling future traffic volumes. To address this, the
Fort Collins Master Street Plan and the Fort Collins City Plan have
designated improvements to various streets. Figure 3 indicates the
improved and/or new road facilities in this area. Due to
constraints on CR11, discussions with City staff indicated that a
potential parallel road to the east of CR11 could better serve this
area. This road would provide access to the "mixed use district"
(per City Plan) located at the CR50/CR9E intersection and a
connection to CR11 (north of Vine Drive). The existing alignment
of CR11 would provide local access to private properties and
existing developments such as Adriel Hills. This road system would
also provide attractive routes so that traffic volumes on CR50E
would not increase significantly as other developments occurred.
Existing Traffic
Morning and afternoon peak hour traffic data were obtained as
part of this study or obtained from recent traffic studies in the
area. This information is presented in Figure 4. Raw traffic
data is presented in Appendix A.
2
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I. INTRODUCTION
This traffic impact study addresses the capacity, geometric,
and control requirements at and near a proposed mixed use
residential development known hereinafter as the Waterfield PUD.
It is proposed to be located west of County Road 9E and north of
Vine Drive in Fort Collins, Colorado.
During the course of the analysis, numerous contacts were made
with the project planning consultant (VF Ripley Associates), the
Fort Collins Planning Department, and the Fort Collins
Transportation Department. This study conforms with typical
traffic impact study guidelines. The study involved the following
steps:
Collect physical, traffic, and development data.
Perform trip generation, trip distribution, and trip
assignment.
Determine peak hour traffic volumes.
Conduct capacity and operational level of service
analyses on key intersections.
Determine roadway improvements as deemed appropriate.
Traffic studies and current planning efforts for the Richard's Lake
PUD Site Access Study, the Hearthfire PUD Site Access Study, the
"Northeast Area Transportation Study," and the "North Front Range
Regional Transportation Plan" were reviewed as part of the
analysis. The City also provided transportation model data related
to the Timberline Extension.
II. EXISTING CONDITIONS
The location of the Waterfield PUD site is shown in Figure 1.
Since the impact in the short range, as well as, the long range is
of concern, it is important that a thorough understanding of the
existing conditions be presented.
Land Use
The Waterfield PUD site is located in the northern area of
Fort Collins. The area surrounding the site is primarily
undeveloped with some residential developments lying primarily to
the northwest and south of the site. These existing residential
areas are not within the 'city limits of Fort Collins.
1
WATERFIELD PUD
SITE ACCESS STUDY
FORT COLLINS, COLORADO
JANUARY 1997
Prepared for:
Colorado Land Source, Ltd.
8101 East Prentice Avenue, Suite M180
Englewood, CO 80111
Prepared by:
MATTHEW J. DELICH, P.E.
2272 Glen Haven Drive
Loveland, CO 80536
Phone: 970-669-2061
FAX: 970-669-5034