HomeMy WebLinkAbout4.C.4. Approve the Roundabout Design for McKenna Road and Valley View Road by the Shakopee Mdewakanton Sioux Community.Consent Business 4. C. 4.
Sl- IAKOPEE
TO: Mayor and City Council
Mark McNeill, City Administrator
FROM: Bruce Loney, Public Works Director
DATE: 02/18/2014
SUBJECT: Approve the Roundabout Design for McKenna Road and Valley View Road by the
Shakopee Mdewakanton Sioux Community (D,E)
Action Sought
Approve a motion approving the Roundabout Design Alternative for McKenna Road and Valley
View Road by the Shakopee Mdewakanton Sioux Community (SMSC).
Background
Previously, the City of Shakopee and the SMSC entered into an agreement for the SMSC to
construct Valley View Road from McKenna Road to CSAH 21. The SMSC desire to construct a
roundabout as shown on the attached drawing.
An intersection controlled evaluation (ICE) has been done for this intersection of two minor
collectors as indicated in our transportation plan. The result of this evaluation is that a roundabout
will handle the future traffic projections in the most safe manner and better mobility than an all
way stop.
Staff is in agreement with the evaluation and supports a roundabout both for traffic movements
and safety. The SMSC will construct and maintain the roundabout. Snow removal of the
roundabout will be coordinated between the SMSC and City of Shakopee Public Works
Departments. Future construction of Valley View Road from CSAH 83 to McKenna Road is
being studied at this time.
Recommendation
Staff recommends that Council approve a motion approving the Roundabout design alternative
for McKenna Road and Valley View Road in order for the SMSC to complete the design and
construction later this year.
Budget Impact
none
Relationship to Vision
This supports Goals D & E: Maintain, improve and create strong partnerships with other public
and private sector entities; and deliver effective and efficient public services by a staff of
well - trained, caring and professional employees.
Requested Action
Approve a motion approving the Roundabout Design Alternative for McKenna Road and Valley
View Road by the Shakopee Mdewakanton Sioux Community (SMSC).
Attachments: Intersection Control Evaluation (ICE)
Man of Roundabout
Man of Roundabout -Close Up
Future Proiected Map
BOLTON 8& M EN K
Consulting Engineers & Surveyors
12224 Nicollet Avenue • Burnsville, MN 55337
V, Phone (952) 890 -0509 • Fax (952) 890 -8065
www.bolton- menk.com
Intersection Control Evaluation Memorandum
Valley View Road at McKenna Road
to
Shakopee Mdewakanton Sioux Community,
Shakopee, Scott County
Program:
Letting Date: Fall 2013 /Spring 2014
1 NC0
Funding: Shakopee Mdewakanton Sioux
Community (SMSC)
Work Identification:
I hereby certify that this report was prepared by me or under my direct supervision and
that I am a duly Registered Professional Engineer under the laws of the State of
Minnesota.
T l 45896 I ti gOI
Ry T. Alleys, PE, PTOE Reg. No. Date
APPROVED:
Shakopee City Engineer
Shakopee Mdewakanton Sioux Community
DESIGNING FOR A BETTER TOMORROW
Bolton & Menk is an equal opportunity employer
Date
Date
VALLEY VIEW ROAD AT MCKENNA
INTERSECTION CONTROL EVALUATION
MEMORANDUM
SHAKOPEE MDEWAKANTON SIOUX
COMMUNITY, CITY OF SHAKOPEE,
SCOTT COUNTY, MN
Prepared by:
Bolton & Menk, Inc.
19
x e
N
-!rr
���WArT il4,v
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
Executive Summary
The intersection of Valley View Road and McKenna Road does not currently exist. A planned
extension of Valley View Road from CSAH 83 (Canterbury Road) to Foothill Trail is proposed in
the City of Shakopee's 2030 Comprehensive plan. Land is currently planned for development as
part of the East Village Third Addition in what would be the southeast quadrant of the proposed
Valley View Road and McKenna Road intersection. This development will include the
construction of Valley View Road from McKenna Road to CSAH 21. This ICE Report will
document the decisions behind the determination of the most appropriate intersection treatment at
Valley View Road and McKenna Road to serve the public.
It has been determined a single lane roundabout is the recommended alternative for the
intersection treatment at Valley View Road and McKenna Road. The main benefits of installing a
roundabout at this location are lower speeds, less conflict points, lower delays, less severe
crashes, and increased mobility when compared to other intersection control alternatives
considered.
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
Table of Contents
I.
Introduction ....................................................................................... ............................... 1
II.
Purpose and Need .............................................................................. ............................... 1
I11.
Existing Conditions ........................................................................... ............................... 2
IV.
Future Growth and Development .................................................... ............................... 2
V.
Safety Analysis ................................................................................... ............................... 3
VI.
Comparison of Alternatives ............................................................... ..............................4
VII.
Additional Considerations ................................................................ ............................... 6
VIIL
Conclusion/Remarks /Engineering Recommendations ................... ............................... 6
IX.
Figures ................................................................................................ ............................... S
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
Intersection Control Evaluation Memorandum
I. Introduction
The proposed intersection of Valley View Road at McKenna Road is located within the
Shakopee Mdewakanton Sioux Community tribal lands in Scott County and the City of
Shakopee. See Figure I for the Project Location.
Shakopee Mdewakanton Sioux Community is located in the southwestern portion of the Twin
City Metropolitan Area, is bordered by the City of Shakopee, City of Prior Lake, and Scott
County. As the population of the Shakopee Mdewakanton Sioux Community grows
additional land will need to be developed to provide housing for residents of the community.
The East Village Third Addition development has been identified as a new development
needed for residential housing and is planned for construction starting in 2013 and scheduled
for completion in 2014.
The City of Shakopee and the surrounding area has within the last 20 years seen extensive
growth in residential and commercial development partially due to the completion of the new
TH 169 River crossing in 1996. According to the US Census Bureau the 2010 population for
the City of Shakopee is 37,076 residents and historically has seen double digit growth over
the last several decades.
II. Purpose and Need
The Shakopee Mdewakanton Sioux Community is developing land for the East Village Third
Addition in the northern part of the community. As part of the development, new roadways
will need to be constructed to provide access to the new homes. Covered in the City of
Shakopee's 2030 Comprehensive Plan is the planned extension of Valley View Road from
CSAH 83(Canterbury Road) to Foothill Trail providing anew east -west connection through
the City of Shakopee and the Shakopee Mdewakanton Sioux Community. A portion of the
Valley View Road extension between McKenna Road and CSAH 21 is one of the new
roadways being constructed as part of the East Village Third Addition development. With the
construction of Valley View Road a new intersection is formed between Valley View Road
and McKenna Road thus requiring the need to determine the most appropriate intersection
treatment for the opening day of the development and into the future.
The purpose of this ICE report is to evaluate and document the analysis that went into
determining the recommended alternative for the configuration of the Valley View Road and
McKenna Road intersection. The ICE report will document the following items:
• Existing Conditions
• Future Growth and Development
• Safety Analysis
• Comparison of Alternatives
• Additional Considerations
The alternatives considered in this ICE report include a two -way stop control, all -way stop
control and roundabout. Based upon the analysis a recommended alternative will be selected
and carried forward into final design.
ICE Memo
January 2014
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
III. Existing Conditions
McKenna Road is currently a rural, two -lane, undivided, north -south roadway within the
proposed project area and is classified as a collector roadway. McKenna Road is part of the
Municipal State Aid System (MSAS) and has been designated as MSAS route 113 according
to the MnDOT MSAS Segment Report. McKenna Road is equipped with narrow paved
shoulders and also has a gravel shoulder beyond the edge of each paved shoulder. Valley
View Road is currently not constructed within the project limits. See Figure 2 showing the
existing conditions.
McKenna Road is currently operating free flow in the vicinity of the proposed McKenna
Road and Valley View Road intersection. The posted speed on McKenna Road is 55 mph.
The Annual Average Daily Traffic (AADT) for 2012 indicates McKenna Road has 1,350
vehicles per day near the proposed McKenna Road and Valley View Road intersection.
The land and roadway planning maps in the City of Shakopee's 2030 Comprehensive Plan
show the existing land at the proposed McKenna Road and Valley View Road intersection
within the Shakopee Mdewakanton Sioux Community property boundary as property in fee
or trust status. The land in the northwest and southwest quadrants of the proposed McKenna
Road and Valley View Road intersection are in proposed trust status, the land in the southeast
quadrant is in Shakopee Mdewakanton Sioux Community trust status and the land in the
northeast quadrant has not been classified. The existing land use based on a review of aerial
imagery is agricultural in all four quadrants where the proposed McKenna Road and Valley
View Road intersection will be located. However, with the planned construction of the East
Village Third Addition, the southeast quadrant of the McKenna Road and Valley View Road
intersection will become low density residential housing.
There are existing utilities within the project limits including an overhead utility line located
along the west side of McKenna Road.
IV. Future Growth and Development
The existing land surrounding McKenna Road and the proposed location of Valley View
Road has a rural context with agricultural land uses and, where present, low density
development on large acreage lots.
To plan for organized growth the City of Shakopee developed a comprehensive plan. The
planned extension of Valley View Road provides a new east -west route through the City of
Shakopee and Shakopee Mdewakanton Sioux Community. Valley View Road is anticipated
to be classified as a collector roadway, of urban design with one through lane in each
direction and left turn lanes at intersections. As proposed, the intersection of Valley View
Road and McKenna Road will be an intersection of collector roadways.
The City of Shakopee's comprehensive plan traffic modeling indicates the Valley View Road
extension would act as a reliever route for CSAH 42 and CSAH 16 and reduce traffic
volumes on these routes by 10 percent. The City of Shakopee's comprehensive plan
indicates high traffic growth potential along McKenna Road and Valley View Road. The
estimated the 2030 AADT for McKenna Road is 3,000 and Valley View Road is 12,000. This
results in more than doubling of the existing (2012) volumes on McKenna Road. With the
high AADT anticipated, the roadway facilities being constructed now need to accommodate
the forecast traffic volumes and operate at an acceptable level of service on the day of
' City of Shakopee 2030 Comprehensive Plan, December 2008, prepared by WSB & Associates, Inc.
ICE Memo
January 2014 2
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
opening and into the future. Additionally, with both McKenna Road and Valley View Road
classified as collector roadways the roadway design needs to provide higher mobility and less
access than a local street/local roadway.
The projected future land use in 2030 from the City of Shakopee's comprehensive plan
indicates the land around the proposed McKenna Road and Valley View Road intersection is
slated for residential purposes.
V. Safety Analysis
A safety analysis was completed using the average crash rates since no intersection exists and
any crashes that have occurred near the proposed intersection location are due to other factors
and are not intersection related.
An analysis was done to determine the expected number of crashes per year using the 2030
forecast volumes for each traffic control alternative and the results are shown in Table 1. The
Intersections Green Sheets by the Minnesota Department of Transportation State Aid for
Local Transportation Traffic Safety Office, Roundabouts: An Informational Guide by Federal
Highway Administration, and Crash Reductions Following Installation of Roundabouts in the
United States by the Insurance Institute for Highway Safety provide average crash rates for
different traffic control options. These rates are determined using Minnesota state -wide (two -
way stop control and all -way stop control) and nation -wide (roundabout control) average
crash rates for similar intersections with the same type of traffic control and applies to an
average volume of traffic expected at the intersection.
While these rates provide a safety comparison of the different traffic control options, changes
in traffic volume, delay, or capacity from the average can alter how the intersection operates.
This can result in a situation where the average crash rates no longer apply. Crash frequency
at intersections is measured based on the crash rate, which is shown as the crashes per million
entering vehicles (MEV).
Table 1: Crashes Expected by Traffic Control Type
2030 Annual Traffic Entering
E
5.45
Crash
Predicted Number
Severity
Traffic Control Type
of Crashes per
Rate
Rate
Year
TWSCMI
0.2
1.1
0.2
AWSCI �1'
0.4
2.2
0.7
Roundabout "
0.2 to 0.6
1.1 to 3.3
0.1 to 0.3
* Crash Rates for the TWSC and AWSC are from the 2011 Intersection Green Sheets for a period of 3
years (2009 — 2011).
* * There may or may not be a crash reduction due to a roundabout according the Highway Safety
Manual (HSM).
(1) TWSC= Two -Way Stop Control
(2) AWSC = All -Way Stop Control
Based on average crash rates the two -way stop control has the lowest crash rate. Expected
crash rates for the roundabout are shown as a range due to very little data as compared to the
other types of intersection control. The roundabout may have the same number of crashes as a
two -way stop control intersection on the lower end of the range or have slightly more crashes
than an all -way stop control intersection at the higher end of the range. However, the types of
crashes associated with roundabouts tend to be less severe. Looking at a comparison of
ICE Memo
January 2014 3
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
severity rates for the different traffic control types the roundabout may have the lowest
severity rate or a slightly higher severity rate as a two -way stop controlled intersection. The
roundabout has a lower severity rate than an all -way stop control intersection. The low speeds
associated with roundabouts allow drivers more time to react to potential conflicts and the
differential speeds within a roundabout are smaller resulting in less severe crashes. The
installation of an all -way stop controlled intersection usually involves rear -end type crashes,
while the installation of a roundabout usually involves side -swipe crashes, which tend to be
less severe and are more likely to be property damage crashes than injury type crashes. The
roundabout has fewer conflict points in comparison to a conventional intersection. Pedestrian
conflict points are also reduced with a roundabout. See Figure 3 for a comparative
illustration of conflict points within a two -way stop /all -way stop controlled intersection and a
roundabout.
Vehicle - Pedestrian and Vehicle - Vehicle Conflict Points
TWSC, AWSC
Roundabout
Figure 3 — TWSC, AWSC and Roundabout Conflict Points
Figures From:
Roundabouts: An Informational Guide
FHWA (Pub. No. FHWA -RD -00 -067)
Based on the available known crash rates and severity rates for the different types of
intersection control the roundabout is viewed as the safer alternative as it generally has a
similar crash rate when comparing it to other intersection alternatives and generally has lower
severity rate than the other intersection alternatives.
VI. Comparison of Alternatives
This discussion will assist in determining the appropriate traffic control for the intersection to
provide acceptable operations and maximize safety for vehicles and pedestrians. The build
alternatives considered are as follows:
Two -Way Stop Control
All -Way Stop Control
Roundabout
A no build scenario results in no intersection and no new development. Therefore since the
development is being constructed the no build alternative was removed from further
consideration.
ICE Memo
January 2014
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
The two -way stop control and all -way stop control alternatives from a geometric perspective
are very similar designs. A single through lane of approach is provided for all legs with turn
lanes at the intersection. The roundabout alternative proposed provides a single lane of
approach for all legs at the intersection and no turn lanes. The East Village Third Addition
development does not include the full construction of Valley View Road (west leg of
approach) as the CSAH 83 to McKenna Road segment is not constructed with the
development and this results in a T- intersection configuration at McKenna Road and Valley
View Road for the interim. The alternative selected will need to consider the interim
intersection design and operation along with the full build out.
Two -Way Stop Control Alternative
A two -way stop control intersection provides the major movement an opportunity to proceed
through the intersection uninhibited while the minor movement is restricted. For the interim
scenario the major movement will be along McKenna Road making Valley View Road stop
controlled. The interim condition allows McKenna Road to remain free flowing however the
posted speed limit is currently 55mph leaving the opportunity for the high speeds to impact
the safety of the intersection. A countermeasure would be to lower the posted speed however,
getting drivers to change their behavior would be challenging since no physical items are
forcing a driver to reduce their speed other than a sign. The minor movement stop control
does allow pedestrians and cyclists adequate gaps to cross the minor leg however the
potential is more limited if crossing the major movement since this movement remains free
flowing. The down fall of the two -way stop control is as the major movement volume
increases longer delays and queuing will result on the minor legs. An additional concern of
the two -way stop control is once the full build out is completed, a traffic control change will
likely occur making McKenna Road stop controlled and Valley View Road free flowing
causing a change to the intersection operation, changing driver expectations and driver
behavior.
All -Way Stop Control Alternative
An all -way stop control intersection provides all road users adequate gaps to proceed through
the intersection as all movements are required to stop. This is advantageous as both Valley
View Road and McKenna Road are classified and collector roadways. The all -way stop
control provides pedestrians and cyclists adequate gaps to cross major and minor legs as all
movements are required to stop. The down fall of the all -way stop control are delays occur
for all movements from each approach, travel times increase and intersection capacity is
limited. For the interim T- intersection scenario the all -way stop control does not require a
significant change once full build out is completed as the two -way stop control since all legs
of the intersection are already required to stop.
Roundabout Alternative
Roundabouts have become more prevalent in Minnesota within the last few years. They are
extremely efficient in moving traffic through an intersection since traffic only needs to yield
to circulating vehicles. Some of the main benefits of roundabouts are listed below:
• Efficient traffic operations
• Typically less delay than other types of intersection control
• Low severity crashes due to shallow entry angle
• Naturally reduce speeds due to approach curvature
• Provides the least amount of conflict points when compared with a two -way or all -
way stop control
• Safely handles U -turns
ICE Memo
January 2014
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
• Can minimize width of approach legs
A single lane roundabout in this location would not only provide for lower delays but it
would also keep vehicle speeds low. Since roundabouts are typically designed to be traversed
anywhere between 15 and 25 mph, vehicles are forced to slow down to enter the roundabout,
thus reducing vehicle speed on the approaches to the intersection. A single lane roundabout
would function adequately for the interim T- intersection condition and would not require any
changes to traffic control once the full build out is completed.
Summary ofAlternatives
All build alternatives will provide for the orderly flow of traffic. When comparing the build
alternatives from an operations perspective, the roundabout is anticipated to perform the best
amongst the alternatives as all movements typically will have lower delays than stop control,
lower speeds on all approaches to the intersection, travel times should be shorter when
compared to stop control.
VIL Additional Considerations
Other items typically considered in this type of evaluation may include access management,
steep terrain issues and pedestrian and/or bicycle issues.
Access Management
The proposed intersection of Valley View Road and McKenna Road will be located in what
is now a rural agricultural area and in the next 20 years will more than likely be a fully
developed low density residential area. The proposed intersection is of two proposed collector
roadways with a primary goal to connect the local streets to the arterials. Valley View Road
and McKenna Road have been identified as collector roadways in the City of Shakopee's
2030 Comprehensive Plan indicating these roads need to provide more mobility and less
access than a local street.
Terrain
The existing terrain where the proposed intersection will be located is relatively flat. No
known issues are readily apparent due to the terrain of the proposed location.
Pedestrian and Bicycle Issues
The low density residential develop being planned around the proposed Valley View Road
and McKenna Road intersection includes a sidewalk and trail network. With this proposed
development a portion of the trail network along the southside of Valley View Road between
McKenna Road and CSAH 21 is proposed to be constructed with the East Village Third
Addition Development. A single lane roundabout provides less conflict points between
vehicle and pedestrian- bicycle traffic and requires lower vehicle speeds giving pedestrians
and bicyclists more opportunity to cross the intersection.
The intersection design should incorporate accommodations for pedestrians and provide safe
crossings.
Bicycles shall also be accommodated in a similar manner to motorized vehicles. However,
with a roundabout design, it is recommended that bicycles have an option to exit the street
prior to the entrance into the roundabout proper.
VIII. Conclusion/Remarks /Engineering Recommendations
Based on the analysis documented in this ICE memorandum, a single lane roundabout is the
recommended intersection control for this location. See Figure 4 for the proposed roundabout
ICE Memo
January 2014 6
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
layout. The roundabout provides an intersection control that is safer with lower speeds and
less conflict points resulting in less severe crashes. When comparing the operational aspects
of a roundabout with the two -way stop control and all -way stop control; the roundabout will
provide more reliable operations, improve mobility by keeping traffic moving, have lower
delays and also force drivers to travel at lower speeds. As the surrounding land is developed
the roundabout should function adequately and serve the needs of the public. Additionally,
the roundabout can serve as a traffic calming device and aesthetic features can be added to
create a gateway to the neighborhood. Lastly the single lane roundabout alternative has
received initial support by the Shakopee Mdewakanton Sioux Community making this
alternative politically viable as well.
ICE Memo
January 2014 7
Valley View Road at McKenna Road
Shakopee Mdewakanton Sioux Community, Shakopee, Scott County
IX. Figures
Figure 1: Location Map
Figure 2: Existing Conditions
Figure 3: TWSC, AWSC and Roundabout Conflict Points (within Body of Report)
Figure 4: Recommended Alternative
ICE Memo
January 2014
1
ppp3 � n.e.P
•
uPlr P xM
a.a N
G p FIGURE 1 LOCATION MAP
%;. VALLEY VIEW ROAD AT MCKENNA ROAD
SHAKOPEE MDEWAKANTON SIOUX COMMUNITY, SHAKOPEE, MN
jeremyme pdf- color.pltcfg bml.tbl 12/30/2013 5:21:53 PM H:\SMSC \C15106906 \2_Pre1imfnary Design \C_Reports \ICE Repor
ienrer M.Mamedr
..... Net erignioP v,en..
sr.e.,i..
�..Ln=
.. New Hcpe CryeNi CarnrLr. erzn!r�nv Huyrnr p'ar
ns
nivvenJrrr.r
ri
rr. Jina ptirroutF, gepNS Roseville Jitk ClI,h
.r
3.......
hlwr na nr. MaOevood tnkc Ekno
�
Goldeno
ra
valley Minneapolis Oakdale
wi mua
svy , .�
sysen:r,n
Stturiz Park [.)
Lakel,nd
LllnnetOnkd Si Paul
la
M nd�
ymn
C Edina [� `NOedbury
'
St BOnAaoms
SFVwo� rvwr P ca.rl
Ahen
Lottt
Aprr
- ., hrm.actrn
... at :om .. vaJ
sen Rlchtield
Chanhas .... Mcn Sala
Eden Rrddle
W,mru
Inver Grove Cata,, Grwe
B1 9loominyton Eaaan 16,hb
a 0
Snakepee i�t
Yo"r9Amok,
<FWa -r _. -
pJdjren-
<olPRne
Savage eurnsv.11e
n Applevalley emomecm emrir as
.ur w
IS '.
rr.Ir Rr�r.r ]r
'
Lakeville L ohe
m grna�,ron
.... � •� •.
xr r.r.k, se
P-i- C,¢la Rna
xa,.ror
1
ppp3 � n.e.P
•
uPlr P xM
a.a N
G p FIGURE 1 LOCATION MAP
%;. VALLEY VIEW ROAD AT MCKENNA ROAD
SHAKOPEE MDEWAKANTON SIOUX COMMUNITY, SHAKOPEE, MN
jeremyme pdf- color.pltcfg bml.tbl 12/30/2013 5:21:53 PM H:\SMSC \C15106906 \2_Pre1imfnary Design \C_Reports \ICE Repor
jeremyme pdf- color.pltcfg bmLtbl 12/30/2013 5:22:51 PM H: \SMSC \Cl5I06906 \2- PreOmtnary Oeelgn \C- Reports \ICE Repo,
p
Q.
2m
VALLEY VIEW ROAD. - VALLEY VIEW ROAD
40MPH 40 MPH
�J;. .°+ `
b y I
a
.r a
1 1
DunDT a
i
i I �
----------- -- ___- __ ____ _ ________ ---------------
T l l BLOCK 2
5
3 4
�12'�
SHAKOPEE MDEWAKANTON SIOUX COMMUNITY SHEET
FIGURE ALTERNATIVE S EASTVULA(*I HIND AL)t N OF
`-•' rtn ly�� ROUNDABOUT- 10C ROAD& VALLEYVIEW ROAD 1
I
SHAKOPEE
City of Shakopee, Minnesota
Transportation Plan Update
Pmpmn ar.
A
wso
W
Note:
Legend Assumes 2030 Land Use and Baseline
- - - - - -• Future Roadway Future Roadway Network Plus Valley
View Road Extension
2030 Planning Area
Additional 2050 Planning Area
Projected 2030
Daily Traffic Volumes
Figure 5.3