HomeMy WebLinkAboutLEMAY AVENUE ESTATES - FDP - 37-04B - SUBMITTAL DOCUMENTS - ROUND 1 - TRAFFIC STUDY• Transit operations were not evaluated since the site is outside the Trans -
Fort service area.
• Roundabout installation at the Lemay Avenue — Carpenter Road intersec-
tion will vastly improve operations at this intersection. This improvement is
not needed with Lemay Avenue Estates; however, the City may want to
consider it in the future.
In summary, the transportation demands associated with Lemay Avenue Estates are
considered negligible. These demands can be easily absorbed and accommodated
by the existing and planned transportation system.
24
IX. TRANSIT
This site is not currently within the Transfort service area. Consequently, a transit
evaluation was not conducted.
X. CONCLUSIONS
Based upon the analyses, investigations, and findings documented in earlier sections
of this report, the following can be concluded:
• Current roadway operations in the area of Lemay Avenue Estates are ac-
ceptable during all peak hour periods.
• Site traffic associated with build out of the Lemay Avenue Estates develop-
ment is expected to be 42 morning peak hour trips, 57 afternoon peak hour
trips, and 536 trips per day. These trips are considered manageable.
• The impacts of site generated traffic are negligible given the finding that in-
tersection levels of service at key locations remain constant whether or not
Lemay Avenue Estates is developed.
• Lemay Avenue Estates will trigger a need for a southbound left turn lane on
Lemay Avenue at the site access. No other improvements are needed.
• Per City criteria, traffic operations will be acceptable at build -out of the pro-
posed development.
• Lemay Avenue Estates will extend the existing pedestrian system on the
east side of Lemay Avenue resulting in acceptable pedestrian levels of ser-
vice.
• Bicycle levels of service will exceed those required by City standards since
the site will have direct access to area bicycle facilities.
23
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the basis for determining minimum level of service criteria. Five factors were as-
sessed under current and future conditions. Future pedestrian levels of service were
determined to be acceptable. The pedestrian level of service worksheet is presented
on Table 1.
VIII. BICYCLE FACILITIES
A. Existing Conditions
There are no on -street bicycle lanes adjacent to the site on Lemay Avenue.
B. Planned Improvements
Bicycle lanes will be extended adjacent to the site on the east side of Lemay Avenue
with this development.
C. Levels of Service
The City of Fort Collins defines level of service based upon connectivity of the site to
existing and planned bicycle facilities. In this instance, the site will abut bicycle lanes
on Lemay Avenue resulting in excellent connectivity in all directions. This results in
level of service 'A' being realized in the future. The bicycle level of service work sheet
is presented on Table 2.
20
= A significant improvement in operations can be expected with a roundabout at the
Lemay Avenue — Carpenter Road intersection. While not project related, the City
might consider this improvement in the future. Capacity sheets are in Appendix E.
VII. PEDESTRIAN FACILITIES
A. Existing Conditions
The existing sidewalk system was reviewed with particular attention was given to trips
associated with Stanton Creek, the adjacent, residential area to the north. At the
scoping session it was determined that this is the only destination within the study
area.
Pedestrian facilities have been installed on Lemay Avenue with other development
under recent City standards. This has resulted in modern designs with all facilities
determined to be in good condition. Sidewalk does not currently exist adjacent to the
site.
B. Planned Improvements
The pedestrian system planned with Lemay Avenue Estates will conform to current
City criteria. Sidewalk will be built adjacent to the site with this project making it
continuous along the east side of Lemay Avenue.
C. Levels -of -Service
The City of Fort Collins multi -modal transportation Level -of -Service Manual (the
Manual) was used to assess both current and future pedestrian conditions. It was
determined that the site fits the 'other" classification. These classifications provide
19
a
I
I
I
SHORT-TERM BACKGROUND OPERATING CONDITONS WITH PROJECT
INTERSECTION
CONTROL
APPROACH/AM
MOVEMENT
LEVEL OF SERVICE
PK HR
PM PK HR
Trilby — Lemay
Signal
EB
C
C
WB
C
C
NB
C
C
SB
C
C
a
M
Carpenter — Lemay
Stop
4-way
EB
E
F
WB
E
F
NB
C
E
SB
D
F
ggigy ta i
zer 11 ��
�vw
m �3mim��
HE N
v �OWRF
mg lgffl
!kk�'V � Wvw,"r'
Roundabout
EB
A
A
WB
A
A
NB
A
A
SIB
A
A
Access — Lemay
Stop
SIB LT
A
A
WB, LT/RT
B
B
As shown above, intersection operations will be acceptable at all locations with Lemay
Avenue Estates fully developed. Of particular importance is the fact that all overall
intersection levels of service remain constant whether or not this development is built.
This demonstrates that the Lemay Avenue Estates development will not significantly
impact the area street system.
M
SHORT-TERM BACKGROUND OPERATING CONDITONS WITHOUT PROJECT
INTERSECTION
CONTROL
APPROACH/
MOVEMENT
LEVEL OF SERVICE
AM PK HR
PM PK HR
Trilby — Lemay
Signal
EB
C
C
WB
C
C
NB
C
C
SIB
C
C
't N'%�:.tC3`.%`f "2>cRi
Cy�A�v�i%hi.... °`^e•.
:C.:.Y}} Y...�sWi—Md1Y?�w
Carpenter— Lemay
Stop
4-way
EB
D
F
W B
D
F
NB
C
D
SB
D
F
Capacity worksheets are presented in Appendix D.
= Total Traffic Conditions
Operating conditions with Lemay Avenue Estates fully operational were assessed
using the short-term roadway geometry (Figure 9) and the traffic volumes shown on
R.
Figure 8. In addition to the intersections investigated earlier, the site access point
- was also investigated. As requested by the City, a roundabout analysis was con-
ducted at the Lemay Avenue — Carpenter Road intersection. This analysis assumed
a one lane roundabout and levels of service consistent with generally accepted
volume — capacity ranges. Resultant total traffic levels of service are shown below.
17
E
Trilby
ID
Site Access
Stop
(4 way)
Carpenter
Figure 9
SHORT-TERM ROADWAY GEOMETRY
16
E
d
J
0000 N N
0 M 0
105/145
N
f— 2001360
1
5/35
Trilby
240/180 —.0
"1,) 1
370/230 —►
0 LO LO
50/55 —�
LO N o
Cl) 00 Cl)
N
LO
O
25/15
N
m i
10/5
1
Site Access
LO 0
00
(N u')
O
r
N
O LO V
100/125
ono
4-- 325/335
i
10/10
Carpenter
70/80
1
270/295
O O O
85/35
C °'
Lo
N LO
O
LEGEND: AM/PM Peak Hour
NOTE: Rounded to nearest 5 vehicles.
Figure 8
SHORT-TERM TOTAL TRAFFIC
15
VI. TRAFFIC IMPACTS
In order to assess operating conditions with Lemay Avenue Estates fully operational,
capacity analyses were conducted at the Lemay Avenue intersections with Trilby
Road, Carpenter Road, and the site access. Total traffic (background traffic com-
bined with site traffic) was developed. Short-term total traffic is shown on Figure 8.
Prior to commencing capacity analyses, traffic volumes were reviewed from an auxil-
iary lane standpoint. The results of this review are discussed in the following section.
A. Auxiliary Lane Requirements
Traffic movements at the Lemay Avenue — site access intersection were reviewed
using City auxiliary lane warrants. It was determined that a southbound left turn lane
is warranted on Lemay Avenue at the site access. It was also determined that a
northbound right turn lane at this intersection will not be warranted. Other intersec-
tions were not reviewed given the negligible amount of site traffic.
r'C
B. Short -Term Operating Conditions
Background Conditions
Short-term operating conditions were assessed using background traffic and total
traffic. Total traffic includes full development of Lemay Avenue Estates. Background
levels of service (without Lemay Avenue Estates) were calculated at the Trilby Road
= and Carpenter Road intersections with Lemay Avenue. This investigation used the
traffic volumes shown on Figure 7 and the short-term roadway geometry shown on
Figure 9. It resulted in the operating conditions presented below.
14
E
4)
_j
LO LO C)
00 0 C\j
Cl)
I I 1
105/145
200/360
5/30
Trilby
240/180
T �
370/230
Lo Lo Lo
50/50-4
zt Qco
C=) U')
cm 0 04
CD
N
0 0 C)
U) -4-
0 LO
95/120
to r-_ C)
4--325/335
10/10
Carpenter
65/75
T ("r
270/295
0 LO a
85/35
1�- 00
I I I
U-j
LOBO
N LO
O
LEGEND: AM/PM Peak Hour
NOTE: Rounded to nearest 5 vehicles.
Figure 7
SHORT-TERM BACKGROUND TRAFFIC
13
O
LO
N/5
Trilby
N/5
(IF
LO 0 Z
'U I I
, LO
0
04
LO
25/15
C\f
I
LO
10/5
Site Access
0
Z Lo in
I I I
LO U) LO
5/5
Carpenter
5/5-11
z
LEGEND: AM/PM Peak Hour
N = Nominal
NOTE: Rounded to nearest 5 vehicles.
Figure 6
SITE TRAFFIC
12
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m
E
Trilby
SITE
CD
co
Carpenter
Figure 5
SITE TRAFFIC DISTRIBUTION
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C. Trip Distribution
Trip distribution is a function of the origin and destination of site users and the avail-
able roadway system. In this case, all site traffic must use Lemay Avenue to access
the site. Approximate site traffic distributions are shown on Figure 5. These distribu-
tions generally reflect future directional traffic demands on Lemay Avenue. Morning
and afternoon peak hour traffic resulting from the distribution is presented on Figure 6.
An insignificant amount of cross traffic between this site and Stanton Creek is ex-
pected.
V. FUTURE CONDITIONS
A. Roadway Improvements
No significant major roadway improvements are planned in the area of the site in the
short-term. When and if improvements are made is largely speculative and cannot be
reasonably predicted. For analysis purposes, future improvements were assumed to
occur well beyond the time frame considered in this study.
B. Short -Term Background Traffic
Background traffic was developed using an annual growth rate in the range of 3
percent per year. This factor was applied to existing traffic volumes to approximate
short-term conditions.
Short-term conditions reflect the year 2007. By this time, Lemay Avenue Estates will
be fully built and occupied. Short-term background traffic is shown on Figure 7.
10
1
------------------L=-------------
IV. DEVELOPMENT ISSUES
A. Project Description
Lemay Avenue Estates is a planned residential development with 56 single family
residences. It is expected that construction will start as soon as possible with comple-
tion and full occupancy some time in 2007.
One full movement access point to Lemay Avenue is planned to serve this develop-
ment. An additional access will be provided by connecting to the development
(Stanton Creek) to the north. A concept plan for this development is presented on
Figure 4.
B. Site Traffic
Site traffic was estimated using Institute of Transportation Engineers (ITE) publication,
"Trip Generation, 7th Edition", a nationally recognized reference. A single family
residential use was deemed directly applicable to the use planned for Lemay Avenue
Estates. Trips associated with the development at build out are indicated below.
Land Use
Size
Daily
AM Peak Hour
PM Peak Hour
Rate
Trips
Rate
In
Out
Rate
In
Out
Single Family
560 D.U.
9.57
536
0.75
10
32
1.01
36
21
As shown, this development will generate 42 morning peak hour trips, 57 afternoon
peak hour trips, and 536 trips per day. These trips are considered manageable.
0
Trilby
Site Access
(Future)
Carpenter
Figure 3
EXISTING ROADWAY GEOMETRY
D. Existing Traffic Operations
Highway Capacity Manual procedures were used to quantify current intersection oper-
a ations. Resultant levels of service (LOS) are indicated below for both morning and
afternoon peak hour conditions. Traffic volumes from Figure 2 were loaded onto the
current roadway geometry shown on Figure 3.
CURRENT OPERATING CONDITONS
INTERSECTION
CONTROL
APPROACH/
MOVEMENT
LEVEL OF SERVICE
AM PK HR
PM PK HR
Trilby — Lemay
Signal
EB
C
C
WB
C
C
NB
C
C
SIB
C
C
.v".'�u. A �`— xw'
?, skc i. ': Wx✓°a.
Carpenter — Lemay
Stop
4-way
EB
C
E
W B
C
E
NB
B
C
SIB
C
E
��Z�
Per City standards, overall level of service 'D' is defined as acceptable for signalized
arterial street intersections with level of service `F' considered normal at stop sign
controlled intersections in an urban environment. As shown above, all intersections
currently operate at acceptable levels during peak hour periods. Capacity work
sheets are presented in Appendix C. It should be noted that the capacity analyses
were not "tweaked" to present the best achievable operating conditions. They were
only conducted to the level necessary to determine compliance with City standards.
This approach is consistent throughout this study.
to
E
d
J
CO
O
CO 04 N �
o
m N m
96/132
—
f182/325
.i
5/25
Trilby
217/164 --1
*) 1
334/210 —►
rn r� It
43/48 ----
n N
N N
M
N
O
O rM Cn
O \ N
86/108
m LO �
m m
4-- 294/304
i
11/10
Carpenter
58/66 —,�A
1
2441268 —►
N co 00
75/33
`�° ° i
�
N �
rn
LEGEND: AM/PM Peak Hour
Figure 2
CURRENT PEAK HOUR TRAFFIC
5
Lemay Avenue is an arterial roadway having two lanes in each direction and a shared
center left turn lane just north of the site. It is a north — south roadway extending
significant distances through Fort Collins and extends south to Loveland. Recent
daily traffic on Lemay Avenue near the site is estimated at 7,000 vehicles per day.
Just north of Lemay Avenue Estates, it typically has auxiliary lanes at all key intersec-
tions and on -street bicycle lanes. Sidewalks are also available along both sides of the
road. It transitions to a two-lane rural street section in the immediate area of the site.
Trilby and Carpenter Roads are east — west arterial roadways that lead to other major
roadways in the Fort Collins street system. Trilby Road generally has one lane in
each direction plus auxiliary lanes while Carpenter Road has one lane in each direc-
tion.
The Lemay Avenue intersection with Carpenter Road is under four-way stop sign
control. Traffic signal control currently exists at the Lemay Avenue — Trilby Road
intersection.
B. Surrounding Land Uses
The Lemay Avenue Estates site is currently vacant. Residential developments lie
directly to the north. To the south, the area is generally rural.
C. Existing Traffic
Weekday morning and afternoon peak hour traffic counts were conducted at key
intersections as part of this study. Data was also collected from other traffic studies
and City sources. Current peak hour traffic is shown on Figure 2 with count tabula-
tions available in Appendix B.
4
II. AGENCY DISCUSSIONS
Prior to undertaking this study, a scoping session was held with Eric Bracke. During
that discussion, it was determined that an intermediate transportation impact study
was appropriate. Key areas of agreement and direction are identified below.
• A full assessment of pedestrian, bicycle, and transit levels of service needs
to be conducted.
• The Lemay Avenue intersections with Trilby Road, Carpenter Road, and the
site access should be investigated. Weekday morning and afternoon peak
hour analyses are appropriate.
— Assessments of existing and future short-term conditions are required. The
short-term was identified as the year 2007 reflecting build out of Lemay
Avenue Estates.
• Traffic growth on nearby arterial streets of 3 percent per year is reasonable
to estimate future background traffic.
• Mr. Bracke specifically asked that the Carpenter Road — Lemay Avenue in-
tersection be evaluated as a roundabout in the short-term.
The above items are included or addressed in the following sections of this report with
the applicable scoping forms available in Appendix A.
III. EXISTING CONDITIONS
A. Existing Road Network
Lemay Avenue Estates is located along the east side of Lemay Avenue between
Trilby Road and Carpenter Road. It is bordered on the west by Lemay Avenue.
3
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St b
Rd
c,
R\ILBY
RILBY
ROAD
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2
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0 0
of
P OJ CT
0
CAT
L CAT N 7—
Prwmdv Rd
—j
w (3f
LLI
Ld
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CARPENTER ROAD
L CINITY MAP
KA
Figure 1
VICINITY MAP
I. INTRODUCTION
Lemay Avenue Estates is a residential development located along the east side of
Lemay Avenue about midway between Trilby Road and Carpenter Road in Fort
Collins, Colorado. A vicinity map is presented on Figure 1.
This transportation impact study follows the established guidelines for such studies as
are applicable and appropriate to the proposed project. The following key steps were
undertaken as part of this study.
• Obtain current traffic and roadway data in the immediate area of the site.
• Evaluate current operations to establish base conditions.
• Determine site generated traffic volumes and distribute this traffic to the
nearby street system.
• Estimate roadway traffic volumes for future conditions.
• Evaluate operations with Lemay Avenue Estates fully developed.
• Inventory, evaluate, and assess the pedestrian, bicycle, and transit net-
works serving the site.
• Identify deficiencies and recommend measures to mitigate the impact of
site generated traffic and enhance the alternate travel mode systems as
appropriate.
Key areas of investigation are documented in the following sections of this transporta-
tion impact study.
List of Tables
Table 1 Pedestrian LOS Worksheet ........................................................................ 21
Table 2 Bicycle LOS Worksheet .............................................................................. 22
I
1
List of Figures
Figure1
Vicinity Map...............................................................................................2
Figure 2
Current Peak Hour Traffic.........................................................................5
Figure 3 _
Current Roadway Geometry ......................................................................7
Figure4
Concept Plan.............................................................................................9
Figure 5
Site Traffic Distribution............................................................................11
Figure6
Site Traffic................................................................................................12
Figure 7
Short -Term Background Traffic...............................................................13
Figure 8
Short -Term Total Traffic..........................................................................15
Figure 9
Short -Term Roadway Geometry .............................................................16
Table of Contents
I.
INTRODUCTION..................................................................................................1
II.
AGENCY DISCUSSIONS ........................................ :...........................................
3
III.
EXISTING CONDITIONS.....................................................................................3
A. Existing Road Network..................................................................................3
B. Surrounding Land Uses ........................... :.....................................................
4
C. Existing Traffic...............................................................................................4
D. Existing Traffic Operations............................................................................6
IV.
DEVELOPMENT ISSUES....................................................................................8
A. Project Description........................................................................................8
B. Site Traffic.....................................................................................................8
C. Trip Distribution...........................................................................................10
V.
FUTURE CONDITIONS.....................................................................................10
A. Roadway Improvements..............................................................................10
B. Short -Term Background Traffic...................................................................10
VI.
TRAFFIC IMPACTS...........................................................................................14
A. Auxiliary Lane Requirements.......................................................................14
B. Short -Term Operating Conditions................................................................14
VI I.
PEDESTRIAN FACILITIES................................................................................19
A. Existing Conditions......................................................................................19
B. Planned Improvements................................................................................19
C. Levels-of-Service.........................................................................................19
VIII.
BICYCLE FACILITIES........................................................................................20
A. Existing Conditions......................................................................................20
B. Planned Improvements................................................................................20
C. Levels of Service.........................................................................................20
IX.
TRANSIT............................................................................................................23
X.
CONCLUSIONS.................................................................................................23
Transportation Impact Study
LEMAY AVENUE ESTATES
Fort Collins, Colorado
Prepared For:
Everitt Companies
3030 S. College #200
Fort Collins, CO 80525
Prepared By:
Eugene G. Coppola, P.E.
P. O. Box 260027
Littleton, CO 80163
303-792-2450
October 13, 2004 Au