HomeMy WebLinkAboutNORTHFIELD FILING 1 EXPANDED - FDP190012 - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDYDELICH Northfield TIS, August 2018
ASSOCIATES
TABLE OF CONTENTS
I. INTRODUCTION ........................................................................................................ 1
II. EXISTING CONDITIONS .......................................................................................... 2
Land Use ......................................................................................................................... 2
Streets ............................................................................................................................. 2
Existing Traffic ................................................................................................................. 5
Existing Operation ........................................................................................................... 7
Pederstrian Facilities ....................................................................................................... 7
Bicycle Facilities .............................................................................................................. 7
Transit Facilities .............................................................................................................. 7
III. PROPOSED DEVELOPMENT ................................................................................. 9
Trip Generation ............................................................................................................... 9
Trip Distribution ............................................................................................................. 11
Background Traffic Projections ..................................................................................... 11
Trip Assignment ............................................................................................................ 11
Signal Warrants ............................................................................................................. 11
Operation Analysis ........................................................................................................ 19
Vine/Lemay Adequate Public Facilities ......................................................................... 26
Geometry ...................................................................................................................... 26
Pedestrian Level of Service ........................................................................................... 29
Bicycle Level of Service ................................................................................................ 29
Transit Level of Service ................................................................................................. 29
IV. CONCLUSIONS .................................................................................................... 32
LIST OF TABLES
1. Current Peak Hour Operation .................................................................................... 8
2. Trip Generation ......................................................................................................... 9
3. Short Range (2022) Background Peak Hour Operation .......................................... 20
4. Long Range (2040) Background Peak Hour Operation ........................................... 22
5. Short Range (2022) Total Peak Hour Operation ..................................................... 24
6. Long Range (2040) Total Peak Hour Operation ...................................................... 27
DELICH Northfield TIS, August 2018
ASSOCIATES
LIST OF FIGURES
1. Site Location ............................................................................................................. 3
2. Existing Geometry ..................................................................................................... 4
3. Recent Peak Hour Traffic .......................................................................................... 6
4. Site Plan .................................................................................................................. 10
5. Trip Distribution ....................................................................................................... 12
6. Short Range (2022) Background Peak Hour Traffic ................................................ 13
7. Long Range (2040) Background Peak Hour Traffic ................................................. 14
8. Short Range (2022) Site Generated Peak Hour Traffic ........................................... 15
9. Long Range (2040) Site Generated Peak Hour Traffic ............................................ 16
10. Short Range (2022) Total Peak Hour Traffic ........................................................... 17
11. Long Range (2040) Total Peak Hour Traffic ............................................................ 18
12. Short Range (2022) Geometry ................................................................................ 30
13. Long Range (2040) Geometry ................................................................................. 31
APPENDICES
A. Base Assumptions Form
B. Peak Hour Traffic Counts
C. Current Peak Hour Operation/Level of Service Descriptions/Fort Collins Motor
Vehicle LOS Standards (Intersections)
D. Signal Warrants
E. Short Range (2022) Background Peak Hour Operation
F. Long Range (2040) Background Peak Hour Operation
G. Short Range (2022) Total Peak Hour Operation
H. Long Range (2040) Total Peak Hour Operation
I. Fort Collins Code pertaining to APF
J. Pedestrian/Bicycle Level of Service Worksheets
DELICH Northfield TIS, August 2018
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I. INTRODUCTION
This transportation impact study (TIS) addresses the capacity, geometric, and
control requirements at and near the proposed Northfield development. The proposed
Northfield is located in the northwest quadrant of the future Lemay/Suniga intersection in
Fort Collins, Colorado.
During the course of the analysis, numerous contacts were made with the owner
(Landmark Homes), the project engineer (Interwest), the project planner (TB Group), and
the City of Fort Collins Traffic Operations staff. The Transportation Impact Study Base
Assumptions form and related documents are provided in Appendix A. This study
generally conforms to the format set forth in the Fort Collins TIS Guidelines in the “Larimer
County Urban Area Street Standards” (LCUASS). Due to the trip generation, this is a full
transportation impact study which includes an ODP level study. 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;
- Analyze signal warrants;
- Conduct level of service evaluation of pedestrian, bicycle, and transit modes of
transportation
This TIS is a revision of the “Northfield, Phase 1 Transportation Impact Study”
dated December 2017. It addresses City staff comments and a change in the number of
dwelling units, and APF at the Lemay/Vine intersection.
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II. EXISTING CONDITIONS
The location of the Northfield development is shown in Figure 1. It is important
that a thorough understanding of the existing conditions be presented.
Land Use
Land uses in the area are primarily residential and agriculture (open). There are
residential uses to the south, west, and north of the site. There are agriculture/open
space to the east and southwest of the site. The proposed Northfield site is currently
vacant. The center of Fort Collins lies to the south of the proposed Northfield.
Streets
The primary streets near the Northfield site are Lemay Avenue, Vine Drive,
Conifer Street, Redwood Street, Linden Street, Suniga Road, and North College
Avenue. Figure 2 shows a schematic of the existing geometry at the key intersections.
Lemay Avenue is east of (adjacent to) the proposed Northfield site. It is a north-
south street classified as a four-lane arterial street according to the Fort Collins Master
Street Plan. Currently, Lemay Avenue has a two-lane cross section in this area. At the
Lemay/Vine intersection, Lemay Avenue has all movements combined into single lanes.
The Lemay/Vine intersection has signal control. At the Lemay/Conifer intersection,
Lemay Avenue has a northbound left-turn lane, a through lane in each direction, and a
southbound right-turn lane. The Lemay/Conifer intersection has stop sign control on
Conifer Street. The posted speed limit in this area of Lemay Avenue is 35 mph.
Vine Drive is south of the proposed Northfield site. It is an east-west street
classified as a two-lane collector street according to the Fort Collins Master Street Plan.
Currently, Vine Drive has a two-lane cross section. At the Lemay/Vine intersection,
Vine Drive has an eastbound and westbound left-turn lane and a through/right-turn lane
in each direction. At the Vine/Redwood-Linden intersection, Vine Drive has all
movements combined into single lanes. The Vine/Redwood-Linden intersection has all-
way stop sign control. The posted speed limit in this area of Vine Drive is 35 mph.
Conifer Street is north of the proposed Northfield site. It is an east-west street
classified as a two-lane collector according on the Fort Collins Master Street Plan.
Conifer Street only has a west leg at the Lemay/Conifer intersection. Currently, Conifer
Street has a two-lane cross section with parking on both sides of the street. At the
Lemay/Conifer intersection, Conifer Street operates as a westbound left-turn lane and a
westbound right-turn lane. The posted speed limit in this area of Conifer Street is 30
mph.
Vine
College
Conifer
kory
Redwood
Jerome
Blue Spruce
Suniga
SCALE: 1"=1000'
SITE LOCATION Figure 1
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Northfield TIS, August 2018
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Northfield
Development
EXISTING GEOMETRY Figure 2
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Northfield TIS, August 2018
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Redwood Street
Conifer Street
Suniga Road
- Denotes Lane
STOP
STOP
STOP
STOP
STOP
STOP
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Redwood Street is west of the proposed Northfield site. It is a north-south street
classified as a two-lane collector street according to the Fort Collins Master Street Plan.
Currently, Redwood Street has a two-lane cross section with parking on both sides of
the street. Redwood Street is the north leg of the Vine/Redwood-Linden intersection.
At the Vine/Redwood-Linden intersection, Redwood Street has all southbound
movements combined into a single lane. At the Suniga/Redwood intersection,
Redwood Street has all movements combined into single lanes. The Suniga/Redwood
intersection has stop sign controlled on Suniga Road. The posted speed limit in this
area of Redwood Street is 30 mph.
Linden Street is south of the proposed Northfield site. It is a north-south street
classified as a two-lane collector street according to the Fort Collins Master Street Plan.
Currently, Linden Street has a two-lane cross section with parking on both sides of the
street. Linden Street is the south leg of the Vine/Redwood-Linden intersection. At the
Vine/Redwood-Linden intersection, Linden Street has all northbound movements
combined into a single lane. The posted speed limit in this area of Linden Street is 30
mph.
Suniga Road is southwest of the proposed Northfield site. It is an east-west
street designated as a four-lane arterial street on the Fort Collins Master Street Plan.
Currently, Suniga Road has a four-lane cross section. Suniga Road only has a west leg
at the Suniga/Redwood intersection. The west end of Suniga Road terminates just west
of the Suniga/Blue Spruce Drive-Blondel Drive intersection. At the Suniga/Redwood
intersection, Suniga Road has enough width for an eastbound left-turn lane, a through
lane, and a through/right-turn lane. However, it is striped combining all movements into
a single lane. The posted speed limit in this area of Suniga Road is 35 mph. Suniga
Road will connect to North College Avenue in the near future (1-3 years).
North College Avenue is west of the proposed Northfield site. It is a north-south
street classified as a four-lane arterial on the Fort Collins Master Street Plan. Currently,
College Avenue has a four-lane cross section in this area. The posted speed limit in
this area of North College Avenue is 40 mph in this area.
Existing Traffic
Recent morning and afternoon peak hour traffic volumes are shown in Figure 3.
The traffic counts at the Lemay/Vine intersection were obtained in May 2016. The traffic
counts at the Suniga/Redwood and Lemay/Conifer intersections were obtained in
August 2017. The traffic counts at the Vine/Redwood-Linden intersection were obtained
in September 2017. Raw traffic count data are provided in Appendix B.
AM/PM
RECENT PEAK HOUR TRAFFIC Figure 3
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Redwood Street
13/30
26/77
49/159
26/24
64/48
38/33
3/27
165/235
20/34
18/26
205/194
70/51
2/2
39/110
0/1
68/70
0/0
1/7
Conifer Street
Suniga Road
175/191
286/507
57/43
534/373
15/47
99/195
39/53
311/751
39/74
41/26
594/520
46/72
9/40
111/202
68/73
89/142
184/159
63/40
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Existing Operation
The Lemay/Vine, Lemay/Conifer, Vine/Redwood-Linden, and Suniga/Redwood
intersections were evaluated using techniques provided in the 2010 Highway Capacity
Manual. Using the morning and afternoon peak hour traffic shown in Figure 3, the peak
hour operation is shown in Table 1. The Lemay/Vine, Lemay/Conifer, Vine/Redwood-
Linden, and Suniga/Redwood intersections meet the City of Fort Collins Motor Vehicle
LOS standard during the morning and afternoon peak hours with existing control,
geometry, and signal timing, except for the Lemay/Vine intersection in the afternoon
peak hour. At the Lemay/Vine intersection, the calculated delay for the westbound
approach and eastbound through/right-turn lane was commensurate with level of service
F. Calculation forms are provided in Appendix C. A description of level of service for
signalized and unsignalized intersections from the 2010 Highway Capacity Manual and
a table showing the Fort Collins Motor Vehicle LOS Standards (Intersections) are also
provided in Appendix C. Acceptable overall operation at signalized intersections during
the peak hours is defined as level of service D or better. At signalized intersections,
acceptable operation of any leg and any movement is level of service E. At
arterial/arterial and collector/collector stop sign controlled intersections, acceptable
operation is considered to be at level of service E, overall and level of service F, for any
approach leg. At arterial/collector, arterial/local, collector/local, and local/local stop sign
controlled intersections; acceptable operation is considered to be at level of service D,
overall and level of service F, for any approach leg.
Pedestrian Facilities
There are sidewalks along Redwood Street, Suniga Road, and North College
Avenue. There is a sidewalk along the south side of Conifer Drive. There are no
sidewalks along either side of Vine Drive and Lemay Avenue. It is expected that as
properties in this area are developed or redeveloped, sidewalks will be installed as part
of the street infrastructure.
Bicycle Facilities
Bicycle lanes exist along Lemay Avenue, Vine Drive, Conifer Drive, Redwood
Drive, Linden Street, Suniga Road, Redwood Drive, and North College Avenue, within
the study area.
Transit Facilities
Currently, this area of Fort Collins is served by Transfort Routes 8 and 81. There
are bus stops at the Conifer/Blue Spruce, Conifer/Redwood, and College/Conifer
intersections.
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TABLE 1
Current Peak Hour Operation
Intersection Movement Level of Service
AM PM
Lemay/Vine
(signal)
EB LT D D
EB T/RT D F (84.5 secs)
EB APPROACH D E
WB LT D D
WB T/RT E F (101.8 secs)
WB APPROACH E F (94.1 secs)
NB LT/T/RT A B
SB LT/T/RT B B
OVERALL C D
Lemay/Conifer
(stop sign)
EB LT C D
EB RT B B
EB APPROACH C C
NB LT A A
OVERALL A A
Vine/Redwood-Linden
(all-way stop)
EB LT/T/RT B B
WB LT/T/RT B B
NB LT/T/RT A B
SB LT/T/RT B B
OVERALL B B
Suniga/Redwood
(stop sign)
EB LT/RT A A
NB LT/T A A
OVERALL A A
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III. PROPOSED DEVELOPMENT
Northfield is a residential development. Figure 4 shows a site plan of the
Northfield site. The Northfield development will consist of 138 Brownstone (single
family) dwelling units, 180 Flat (condos) dwelling units, and 122 Cottages
(townhomes/condos) dwelling units. The short range analysis (Year 2022) includes full
development of Northfield and an appropriate increase in background traffic due to
normal growth and other potential developments in the area. This development will
build the connection of Suniga Road from the Suniga/Redwood intersection to the future
Lemay/Suniga intersection. In the short range analysis year it is assumed that Suniga
is connected to North College Avenue. The long range analysis year is considered to
be 2040 and reflects the connection of Suniga Road from North College Avenue
through Timberline Rod. The site plan shows that there will be two full movement
connections to Suniga Road and a full movement connection to Lemay Avenue. The
site will also have access to through the proposed Retreat of Fort Collins development.
Trip Generation
Trip generation is important in considering the impact of a development such as this
upon the existing and proposed street system. Trip generation for Single Family (Code
210), Multifamily Low-Rise Housing (Code 220), and General Office (Code 710) in Trip
Generation, 10th Edition, ITE were used to estimate the trips that would be generated by
the proposed Northfield development. A trip is defined as a one-way vehicle movement
from origin to destination. Table 2 shows the expected trip generation on a daily and peak
hour basis. The trip generation of the Northfield development resulted in 3706 daily trip
ends, 264 morning peak hour trip ends, and 329 afternoon peak hour trip ends.
TABLE 2
Trip Generation
Code Use Size
AWDTE AM Peak Hour PM Peak Hour
Rate Trips Rate In Rate Out Rate In Rate Out
220 Flats (Condos) 180 D.U. 7.32 1318 0.11 20 0.35 63 0.35 63 0.21 38
210 Brownstones (SF) 138 D.U. 9.44 1302 0.19 26 0.55 76 0.62 86 0.37 51
220 Cottages (Condos) 82 D.U. 7.32 600 0.11 9 0.35 29 0.35 29 0.21 17
220 Condominiums 40 D.U. 7.32 292 0.11 4 0.35 14 0.35 14 0.21 8
710 General Office 20.0 KSF 9.74 194 1.00 20 0.16 3 0.18 4 0.97 19
3706 79 185 196 133
SITE PLAN Figure 4
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APPROXIMATE SCALE
1" = 400'
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Trip Distribution
Trip distribution for the Northfield site was based on existing/future travel
patterns, land uses in the area, consideration of trip attractions/productions in the area,
and engineering judgment. Figure 5 shows the trip distribution for the short range
(2022) and long range (2035) analysis futures. The trip distribution was agreed to by
City of Fort Collins staff in the scoping discussions/emails.
Background Traffic Projections
The short range (2022) future reflects the completion of Suniga Road from North
College Avenue to Lemay Avenue. Figure 6 shows the short range (2022) background
traffic projections. Background traffic projections for the short range future horizons
were obtained by reviewing the North Front Range Regional Transportation Plan, CDOT
growth factors, and various traffic studies prepared for this area of Fort Collins. The
other traffic studies in this area are the Crowne at Old Town North, Aspen Heights, Old
Town North, Waters’ Edge Phase 1, Retreat at Fort Collins, and Waterfield. Based
upon these sources, it was determined that the traffic volumes would increase by
approximately 2.0 percent per year. The unbuilt portion of Old Town North, the Crowne
at Old Town North, Waters’ Edge Phase 1, the Retreat at Fort Collins, and Waterfield
were added to the short and long range volumes. Figure 7 shows the long range (2040)
background peak hour traffic projections. The long range (2040) future reflects
completion of Suniga Road, as shown in the Fort Collins Master Street Plan.
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 short range (2022) site generated peak hour traffic. Figure 9
shows the long range (2040) site generated peak hour traffic assignment. Figure 10
shows the short range (2022) total (site plus background) peak hour traffic assignment.
Figure 11 shows the long range (2040) total (site plus background) peak hour traffic
assignment.
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. For the roads in the
vicinity of the Northfield development, four hour and/or eight hour signal warrants are
applicable. These warrants require much data and are applied when the traffic is actually
on the area road system. It is acknowledged that peak hour signal warrants should not be
applied, but since the peak hour forecasts are readily available in a traffic impact study, it
is reasonable to use them to get an idea whether other signal warrants may be met. If
TRIP DISTRIBUTION Figure 5
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Northfield TIS, August 2018
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Conifer Street
Suniga Road
SITE
Redwood
Street
5% 5%
5%
5%
30% 20% 30%
AM/PM
SHORT RANGE (2022) BACKGROUND
PEAK HOUR TRAFFIC Figure 6
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
17/46
41/139
54/176
29/26
108/82
54/42
3/30
197/271
35/45
23/41
234/229
77/56
1241/1287
41/86
820/1480
58/212
58/86
168/126
51/90
357/890
77/210
49/33
695/616
61/117
15/52
151/315
106/94
131/172
287/231
175/107
Conifer Street
Suniga Road
193/211
324/685
49/35
613/428
23/55
109/215
51/97
456/945
54/51
718/663
29/71
72/84
8/32
42/143
8/25
60/46
LONG RANGE (2040) BACKGROUND
PEAK HOUR TRAFFIC Figure 7
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Conifer Street
Suniga Road
250/275
410/725
80/60
760/535
20/70
140/280
Redwood
Street
130/155
540/955
30/155
85/75
955/720
85/135
25/65
250/380
105/115
135/190
275/275
160/80
40/70
50/160
35/105
80/75
65/80
25/35
50/125
295/395
45/65
40/30
360/400
110/75
35/30
85/225
15/45
15/10
130/165
15/10
10/15
20/25
30/35
10/15
25/20
45/25
30/20
830/1495
165/300
SHORT RANGE (2022) SITE
GENERATED PEAK HOUR TRAFFIC Figure 8
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College Avenue
Lemay Avenue
Linden
Street
Redwood Street
16/39
37/27
4/10
24/59
9/7
56/40
23/59
56/40
9/7
4/10
Conifer Street
Suniga Road
9/6
4/9
58/43
38/28
17/42
7/19
26/62
19/13
16/39
4/10
28/69
9/6
65/47
37/27
Site Access
4/10
2/1
3/7
1/2
7/5
10/7
B
AB
Vine Drive
AM/PM
West Site
Access
East Site
Access
A
14/8
0/0
9/6
39/29
0/0
10/7
18/42
LONG RANGE (2040) SITE
GENERATED PEAK HOUR TRAFFIC Figure 9
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College Avenue
Lemay Avenue
Linden
Street
Redwood Street
9/6
9/7
56/40
4/10
16/39
37/27
4/10
24/59
9/7
56/40
Conifer Street
Suniga Road
9/6
4/9
49/37
38/28
17/42
16/25
22/53
23/22
16/39
4/10
28/69
9/6
65/47
37/27
23/59
4/9
A
B
AC
Vine Drive
AM/PM
West Site
Access
Old Lemay
Avenue
B
East Site
Access
C
9/6
17/12
4/9
57/41
7/17
24/61
14/8
0/0
AM/PM
SHORT RANGE (2022) TOTAL
PEAK HOUR TRAFFIC Figure 10
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
17/46
57/178
54/176
29/26
145/109
54/42
3/30
197/271
35/45
23/41
234/229
77/56
1241/1287
45/96
820/1480
82/271
61/87
224/166
51/90
380/949
77/210
49/33
751/656
70/124
15/52
151/315
106/94
135/182
287/231
175/107
Conifer Street
Suniga Road
193/211
333/691
49/35
617/437
23/55
109/215
74/156
460/955
55/53
728/670
32/72
127/124
8/32
42/143
24/64
60/46
AM/PM
LONG RANGE (2035) TOTAL
PEAK HOUR TRAFFIC Figure 11
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Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Conifer Street
Suniga Road
250/275
420/730
80/60
765/545
20/70
140/280
Redwood
Street
155/215
540/955
30/155
90/85
955/720
85/135
35/70
260/385
160/155
135/190
280/285
160/80
40/70
50/160
50/145
80/75
65/80
30/45
50/125
325/365
45/65
50/35
425/445
145/100
35/30
100/265
15/45
15/10
165/190
15/10
10/15
20/25
30/35
10/15
25/20
45/25
30/20
830/1495
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peak hour signal warrants will not be met at a given intersection, it is reasonable to
conclude that it is not likely that other signal warrants would be met. If peak hour signal
warrants are met, it merely indicates that further evaluation should occur in the future as
the development occurs. However, a judgment can be made that some intersections will
likely meet other signal warrants.
Using the short range (2022) total peak hour traffic (Figure 10), the peak hour
signal warrant will likely be met in the morning peak hour at the N. College/Suniga
intersection. The peak hour signal warrant analyses are provided in Appendix D. Other
stop sign controlled intersections will not meet peak hour signal warrants in the short range
(2022) future.
Using the long range (2040) total peak hour traffic (Figure 11), the peak hour signal
warrant will not be met in the morning and afternoon peak hour at the Suniga/Redwood
intersection. The peak hour signal warrant will likely be met in the morning and afternoon
peak hour at the Suniga/Lemay intersection. The peak hour signal warrant analyses are
provided in Appendix D.
Operation Analysis
Capacity analyses were performed at the Lemay/Vine, Lemay/Conifer,
Vine/Redwood-Linden, Suniga/Redwood, N. College/Suniga, and the site access
intersections. The operations analyses were conducted for the short range and long
range futures, reflecting year 2022 and 2035 conditions, respectively. In the long range
future, analysis of the Lemay/Vine intersection was not necessary.
Using the traffic volumes shown in Figure 6, the Lemay/Vine, Lemay/Conifer,
Vine/Redwood-Linden, Suniga/Redwood, and N. College/Suniga intersections operate
in the short range (2022) background traffic future as indicated in Table 3. Calculation
forms for these analyses are provided in Appendix E. The key intersections will meet the
City of Fort Collins Motor Vehicle LOS Standard during the morning and afternoon peak
hours, except for the Lemay/Vine intersection in the afternoon peak hour. At the
Lemay/Vine intersection, the calculated delay for the afternoon approaches was
commensurate with level of service F.
Using the traffic volumes shown in Figure 7, the Lemay/Conifer, Vine/Redwood-
Linden, Suniga/Redwood, and N. College/Suniga intersections operate in the long range
(2040) background traffic future as indicated in Table 4. Calculation forms for these
analyses are provided in Appendix F. The key intersections will meet the City of Fort
Collins Motor Vehicle LOS Standard during the morning and afternoon peak hours.
Using the traffic volumes shown in Figure 10, the Lemay/Vine, Lemay/Conifer,
Vine/Redwood-Linden, Suniga/Redwood, N. College/Suniga, Suniga/West Site Access,
and Suniga/East Site Access intersections operate in the short range (2022) total traffic
as indicated in Table 5. Calculation forms for these analyses are provided in Appendix G.
DELICH Northfield TIS, August 2018
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TABLE 3
Short Range (2022) Background Peak Hour Operation
Intersection Movement Level of Service
AM PM
Lemay/Vine
(signal)
EB LT D D
EB T/RT D F (191.1 secs)
EB APPROACH D F (173.8 secs)
WB LT C E
WB T/RT E F (159.2 secs)
WB APPROACH E F (136.9 secs)
NB LT/T/RT B F (162.3 secs)
SB LT/T/RT B F (150.1 secs)
OVERALL C F (156.6 secs)
Suniga/Lemay
(stop sign)
EB LT C E
EB RT C C
EB APPROACH C D
NB LT B A
OVERALL A A
Lemay/Conifer
(stop sign)
EB LT C E
EB RT C C
EB APPROACH C C
NB LT B A
OVERALL A A
Vine/Redwood-Linden
(all-way stop)
EB LT/T/RT B D
WB LT/T/RT C C
NB LT/T/RT B D
SB LT/T/RT B C
OVERALL C D
Continued on next page
DELICH Northfield TIS, August 2018
ASSOCIATES Page 21
Continued from previous page
TABLE 3
Short Range (2022) Background Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Redwood
(stop sign)
EB LT A A
WB LT A A
NB LT/T/RT B C
SB LT/T/RT B C
OVERALL A A
Suniga/West Site Access
(stop sign)
EB LT A A
SB LT//RT A A
OVERALL A A
Suniga/East Site Access
(stop sign)
WB LT A A
SB LT/RT A B
OVERALL A A
N. College/Suniga
(signal)
WB LT D D
WB RT C C
WB APPROACH D D
NB T A A
NB RT A A
NB APPROACH A A
SB LT A B
SB T A A
SB APPROACH A A
OVERALL A A
DELICH Northfield TIS, August 2018
ASSOCIATES Page 22
TABLE 4
Long Range (2040) Background Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Lemay
(signal)
EB LT D D
EB T C D
EB RT C C
EB APPROACH D D
WB LT D D
WB T D D
WB RT C D
WB APPROACH D D
NB LT B A
NB T B B
NB RT B B
NB APPROACH B B
SB LT A B
SB T B B
SB RT B B
SB APPROACH B B
OVERALL C C
Lemay/Conifer
(stop sign)
EB LT D E
EB RT B B
EB APPROACH B C
NB LT B B
OVERALL A A
Vine/Redwood-Linden
(all-way stop)
EB LT/T/RT A A
WB LT/T/RT A A
NB LT/T/RT A B
SB LT/T/RT A A
OVERALL A A
Continued on next page
DELICH Northfield TIS, August 2018
ASSOCIATES Page 23
Continued from previous page
TABLE 4
Long Range (2040) Background Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Redwood
(stop sign)
EB LT A A
WB LT A A
NB LT E F (348 secs)
NB T/RT C F (289.9 secs)
NB APPROACH D F (302 secs)
SB LT D F
SB T/RT D F (65.8 secs)
SB APPROACH D F
OVERALL A A
Suniga/West Site Access
(stop sign)
EB LT A A
SB LT//RT C C
OVERALL A A
Suniga/East Site Access
(stop sign)
WB LT A A
SB LT/RT C C
OVERALL A A
N. College/Suniga
(signal)
EB LT/T/RT E E
WB LT D D
WB T C D
WB RT C D
WB APPROACH D D
NB LT B A
NB T B B
NB RT B B
NB APPROACH B B
SB LT B D
SB T B B
SB RT B B
SB APPROACH B B
OVERALL C C
DELICH Northfield TIS, August 2018
ASSOCIATES Page 24
TABLE 5
Short Range (2022) Total Peak Hour Operation
Intersection Movement Level of Service
AM PM
Lemay/Vine
(signal)
EB LT D D
EB T/RT D F (191.1 secs)
EB APPROACH D F (173.8 secs)
WB LT C E
WB T/RT E F (173.5 secs)
WB APPROACH E F (148.6 secs)
NB LT/T/RT B F (184.4 secs)
SB LT/T/RT C F (197.6 secs)
OVERALL C F (180.5 secs)
Suniga/Lemay
(stop sign)
EB LT C F (68.3 secs)
EB RT C C
EB APPROACH C E
NB LT B B
OVERALL A A
Lemay/Site Access
(stop sign)
EB LT/RT C D
NB LT A A
OVERALL A A
Lemay/Conifer
(stop sign)
EB LT D E
EB RT C C
EB APPROACH C C
NB LT B A
OVERALL A A
Vine/Redwood-Linden
(all-way stop)
EB LT/T/RT B E
WB LT/T/RT C D
NB LT/T/RT B E
SB LT/T/RT B C
OVERALL B E
Continued on next page
DELICH Northfield TIS, August 2018
ASSOCIATES Page 25
Continued from previous page
TABLE 5
Short Range (2022) Total Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Redwood
(stop sign)
EB LT A A
WB LT A A
NB LT C C
NB T/RT B D
NB APPROACH B D
SB LT C D
SB T/RT B C
SB APPROACH B C
OVERALL A B
Suniga/West Site Access
(stop sign)
EB LT A A
WB LT A A
NB LT/T/RT B B
SB LT/T/RT B B
OVERALL A A
Suniga/East Site Access
(stop sign)
WB LT A A
SB LT B B
SB RT A A
SB APPROACH A B
OVERALL A A
N. College/Suniga
(signal)
WB LT D D
WB RT C C
WB APPROACH D D
NB T A A
NB RT A A
NB APPROACH A A
SB LT A C
SB T A A
SB APPROACH A A
OVERALL A A
DELICH Northfield TIS, August 2018
ASSOCIATES Page 26
The key intersections will meet the City of Fort Collins Motor Vehicle LOS Standard during
the morning and afternoon peak hours, except for the Lemay/Vine intersection in the
afternoon peak hour. At the Lemay/Vine intersection, the calculated delay for the
afternoon approaches was commensurate with level of service F. Mitigation for the
Lemay/Vine intersection level of service will be determined through discussion with the
City of Fort Collins.
Using the traffic volumes shown in Figure 11, the Lemay/Conifer, Vine/Redwood-
Linden, Suniga/Redwood, N. College/Suniga, Suniga/West Site Access, Suniga/East
Site Access, Lemay/North Site Access, and Lemay/South Site Access intersections
operate in the long range (2040) total traffic future as indicated in Table 6. Calculation
forms for these analyses are provided in Appendix H. The key intersections will meet the
City of Fort Collins Motor Vehicle LOS Standard during the morning and afternoon peak
hours.
Vine/Lemay Adequate Public Facilities
Proposed developments in Northeast Fort Collins are required to address the
operation at the Vine/Lemay intersection. This intersection has been an issue for
proposed developments in North Fort Collins that will contribute traffic through this
intersection. Due to existing site constraints, a short term improvement is not
probable/practical and a proposed long term solution of grade separation) has not been
fully funded.
Language from the Fort Collins Code, pertaining to APF, is provided in Appendix I.
The transportation elements are contained in: 3.7.3(D)(1); 3.7.3(1)(a); and 3.7.3(F). In
3.7.3(D)(1) and 3.7.3(1)(a), an intersection overall level of service E must be achieved to
not cause an APF issue. In 3.7.3(F), an APF exception can be granted when the project
traffic, through the Vine/Lemay intersection, is less than 50 peak hour trips.
Using the traffic volumes shown in Figure 10, the overall level of service at the
Vine/Lemay intersection will be C and F, in the respective peak hours. Based on the site
generated traffic shown in Figure 8, the site generated traffic passing through the
Vine/Lemay intersection is 92 and 116 vehicles, in the respective peak hours. The APF
exception element cannot be applied, since the traffic passing through the Vine/Lemay
intersection is greater than 50 vehicles in either peak hour.
The City of Fort Collins is considering revisions to the Fort Collins Code, pertaining
to APF. These changes, if approved, will allow larger developments to move forward by
proposing mitigation options based on the size/impact of the development. If the Code
revisions related to APF are not approved, Northfield will need to consider options related
to this issue: 1) phase the development so that less than 50 peak hour trips are generated
through the Lemay/Vine intersection; 2) propose and install improvements to the existing
Lemay/Vine intersection; or 3) provided funds toward the construction of grade separated
improvements. It should be noted that phasing developments to stay under the APF
threshold has been the standard approach for other large developments in the
northeastern portion of Fort Collins.
DELICH Northfield TIS, August 2018
ASSOCIATES Page 27
TABLE 6
Long Range (2040) Total Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Lemay
(signal)
EB LT D D
EB T C D
EB RT C D
EB APPROACH C D
WB LT D D
WB T C D
WB RT C D
WB APPROACH D D
NB LT B A
NB T B B
NB RT B B
NB APPROACH B B
SB LT B B
SB T B B
SB RT B B
SB APPROACH B B
OVERALL C C
Lemay/Conifer
(stop sign)
EB LT D E
EB RT B B
EB APPROACH B C
NB LT B B
OVERALL A A
Vine/Redwood-Linden
(all-way stop)
EB LT/T/RT A A
WB LT/T/RT A A
NB LT/T/RT A B
SB LT/T/RT A A
OVERALL A A
Suniga/Redwood
(stop sign)
EB LT A A
WB LT A A
NB LT F (78.8 secs) F (593.4 secs)
NB T/RT D F (387.8 secs)
NB APPROACH E F (426.2 secs)
SB LT F (58.3 secs) F
SB T/RT E F (91 secs)
SB APPROACH E F
OVERALL B F (94.6 secs)
Continued on next page
DELICH Northfield TIS, August 2018
ASSOCIATES Page 28
Continued from previous page
TABLE 6
Long Range (2040) Total Peak Hour Operation
Intersection Movement Level of Service
AM PM
Suniga/Redwood
(signal)
EB LT D C
EB T/RT D D
EB APPROACH D D
WB LT D D
WB T/RT D D
WB APPROACH D D
NB LT B B
NB T/RT A B
NB APPROACH A B
SB LT A B
SB T/RT A B
SB APPROACH A B
OVERALL D C
Suniga/West Site Access
(stop sign)
EB LT A A
WB LT A A
NB LT/T/RT C C
SB LT/T/RT C C
OVERALL A A
Suniga/East Site Access
(stop sign)
EB LT A A
SB LT C C
SB RT B B
SB APPROACH B C
OVERALL A A
Suniga/Old Lemay
(stop sign)
EB LT A A
WB LT A A
NB LT/T/RT B C
SB LT/T/RT C C
OVERALL A A
N. College/Suniga
(signal)
EB LT/T/RT E E
WB LT D E
WB T C D
WB RT C D
WB APPROACH D E
NB LT B A
NB T B C
NB RT B B
NB APPROACH B B
SB LT B D
SB T B B
SB RT B B
SB APPROACH B B
OVERALL C C
DELICH Northfield TIS, August 2018
ASSOCIATES Page 29
Geometry
Figure 12 shows a schematic of the short range (2022) geometry. This is the
existing geometry at the Lemay/Vine, Lemay/Conifer, and Vine/Redwood-Linden
intersections. The N. College/Suniga and Lemay/Suniga intersections are future
intersections. Left-turn lanes are required along Suniga Road and Lemay Avenue. A
westbound right-turn lane is required at the East Site Access.
Figure 13 shows a schematic of the long range (2040) geometry. This is based on
the Fort Collins Master Street Plan.
Pedestrian Level of Service
Appendix J shows a map of the area that is within 1320 feet of the Northfield
development. There are three pedestrian destinations within 1320 feet of the Northfield
development. These are: 1) the residential area to the south; 2) the residential area to
the west; and 3) the residential area to the north. The Northfield site is located within an
area termed as “transit corridor,” which sets the level of service threshold at LOS B for
directness and security and LOS C for all other measured categories. Pedestrian level
of service cannot be achieved for all pedestrian destinations. The residential
neighborhood to the south does not meet directness or continuity. Directness and
continuity will be achieved with the full development of Northfield. The residential
neighborhood to the north does not meet directness or continuity. Directness and
continuity will be achieved with the development of the Retreat to the northwest. The
pedestrian LOS Worksheet is provided in Appendix J. There are properties that are
within the pedestrian influence area that do not have sidewalks. The practical limits of
pedestrian improvements would be on the Northfield site itself.
Bicycle Level of Service
Appendix J shows a map of the area that is within 1320 feet of the Northfield
development. There are no bicycle destinations within 1320 feet of the Northfield
development. The Bicycle LOS Worksheet is provided in Appendix J. The minimum
level of service for this site is C. This site is connected to bike lanes on Lemay Avenue,
Suniga Road, and Redwood Street. Therefore, it is concluded that level of service A
can be achieved.
Transit Level of Service
This area of Fort Collins is served by Transfort Routes 8 and 81. There are bus
stops at the Conifer/Blue Spruce, Conifer/Redwood, and College/Conifer intersections.
SHORT RANGE (2022) GEOMETRY Figure 12
DELICH
ASSOCIATES
Northfield TIS, August 2018
Page 30
Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Conifer Street
Suniga
Road
Redwood
Street
East Site
Access
West Site
Access
- Denotes Lane
- Denotes New Lane
Site Access
LONG RANGE (2035) GEOMETRY Figure 13
DELICH
ASSOCIATES
Northfield TIS, August 2018
Page 29
Vine Drive
College Avenue
Lemay Avenue
Linden
Street
Conifer Street
Redwood
Street
- Denotes New Lane
- Denotes Lane
C
Suniga Road
A
B
AC
West Site
Access
Old Lemay
Avenue
B
East Site
Access
DELICH Northfield TIS, August 2018
ASSOCIATES Page 32
IV. CONCLUSIONS
This study assessed the impacts of the Northfield development on the street
system in the vicinity of the proposed development in the short range (2022) and long
range (2040) futures. As a result of this analysis, the following is concluded:
- The development of the Northfield development is feasible from a traffic
engineering standpoint. The trip generation of the Northfield development resulted
in 3706 daily trip ends, 264 morning peak hour trip ends, and 329 afternoon peak
hour trip ends.
- Current operation at the Lemay/Vine, Lemay/Conifer, Vine/Redwood-Linden, and
Suniga/Redwood intersections meet the City of Fort Collins Motor Vehicle LOS
standard during the morning and afternoon peak hours with existing signal
control, geometry, and signal timing, except for the Lemay/Vine intersection in
the afternoon peak hour. At the Lemay/Vine intersection, the calculated delay for
the westbound approach and eastbound through/right-turn lane was commensurate
with level of service F.
- The Vine/Redwood-Linden and Suniga/Redwood intersections are currently
unsignalized. It is not likely that volume based signal warrants would be met at the
Vine/Redwood-Linden and Suniga/Redwood intersections. Using the short range
(2022) total peak hour traffic forecasts, the peak hour signal warrant will likely be
met in the morning and afternoon peak hours at the N. College/Suniga intersection.
Using the long range (2040) total peak hour traffic forecasts, the peak hour signal
warrant will likely be met in the morning and afternoon peak hours at the
Lemay/Suniga intersection.
- In the short range (2022) future, given development of the Northfield site and an
increase in background traffic, the Lemay/Vine, Lemay/Conifer, Vine/Redwood-
Linden, Suniga/Redwood, N. College/Suniga, Suniga/West Site Access, and
Suniga/East Site Access intersections will meet the City of Fort Collins Motor
Vehicle LOS Standard during the morning and afternoon peak hours, except for the
Lemay/Vine intersection in the afternoon peak hour. At the Lemay/Vine
intersection, the calculated delay for the afternoon approaches was commensurate
with level of service F. Mitigation for the Lemay/Vine intersection level of service
will be determined through discussions with the City of Fort Collins.
- In the long range (2040) future, given full development of the Northfield site and an
increase in background traffic, the Lemay/Conifer, Vine/Redwood-Linden,
Suniga/Redwood, N. College/Suniga, Suniga/West Site Access, Suniga/East Site
Access, Lemay/North Site Access, and Lemay/South Site Access intersections
will meet the City of Fort Collins Motor Vehicle LOS Standard during the morning
and afternoon peak hours.
DELICH Northfield TIS, August 2018
ASSOCIATES Page 33
- The short range (2022) geometry is shown in Figure 12. This is the existing
geometry at the Lemay/Vine, Lemay/Conifer, and Vine/Redwood-Linden
intersections. The N. College/Suniga and Lemay/Suniga intersections are future
intersections.
- The long range (2040) geometry is shown in Figure 13. This is based on the Fort
Collins Master Street Plan.
- This development does have an APF issue at the Vine/Lemay intersection. The
City of Fort Collins is considering revisions to the Fort Collins Code, pertaining to
APF. These changes, if approved, will allow larger developments to move forward
by proposing mitigation options based on the size/impact of the development. If the
Code revisions related to APF are not approved, the Retreat at Fort Collins will
need to consider options related to this issue: 1) phase the development so that
less than 50 peak hour trips are generated through the Lemay/Vine intersection; 2)
propose and install improvements to the existing Lemay/Vine intersection; or 3)
provided funds toward the construction of grade improvements. It should be noted
that phasing developments to stay under the APF threshold has been the standard
approach for other large developments in the northeastern portion of Fort Collins.
- Acceptable level of service is achieved for bicycle and transit modes based upon
the measures in the multi-modal transportation guidelines and future improvements
to the street system in the area. Pedestrian level of service cannot be achieved
for all pedestrian destinations. The residential neighborhood to the south does
not meet directness or continuity. Directness and continuity will be achieved with
the full development of Northfield. The residential neighborhood to the north
does not meet directness or continuity. Directness and continuity will be
achieved with the development of the Retreat to the northwest. There are
properties that are within the pedestrian influence area that do not have
sidewalks. The practical limits of pedestrian improvements would be on the
Northfield site itself.
190/360
5/5
1310/1320
170/270
25/20
5/5
10/10
140/205
5/5
375/290
C
5/15
0/0
5/10
10/5
0/0
15/10
10/20
420/585
15/5
5/20
505/550
10/5
Suniga Road
50/35
50/40
20/55
500/515
25/55
395/570
A
B
AC
West Site
Access
Old Lemay
Avenue
B
East Site
Access
15/10
0/0
10/5
45/35
0/0
25/20
25/45
380/595
5/15
10/30
540/515
5/10
55/66
25/30
27/106
76/158
30/16
24/23
140/139
75/55
Redwood
Street
58/43
48/38
20/56
109/153
26/62
110/153 B
AB
West Site
Access
East Site
Access
Site Access
4/10
479/985
3/7
750/699
7/5
10/7
A
14/8
0/0
9/6
42/32
0/0
25/21
19/45
102/193
4/14
8/29
156/158
3/9
9/6
39/29
0/0
10/7
18/42
26/62
4/14
4/10
58/43
3/9
26/62
4/14
4/10
58/43
3/9
23/59
4/10
1/2
10/7
2/1
55/40
5/5
1310/1320
165/260
25/20
5/5
10/10
130/200
5/5
320/250
AM/PM
Rounded to Nearest
5 Vehicles
0/0
10/10
5/15
485/490
0/0
370/550
5/5
15/15
5/20
480/470
5/5
355/535 AB
AB
West Site
Access
East Site
Access
55/66
21/20
27/106
48/89
30/16
15/17
75/92
38/28
Redwood Street
0/0
10/10
3/14
102/134
0/0
91/145
3/3
15/14
4/19
98/115
1/3
76/131 AB
AB
West Site
Access
East Site
Access