A-2. Key Finanical Strategy: Market Boulevard Traffic/Feasibility Study0
CITY OF
CAANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
MEMORANDUM
TO: Todd Gerhardt, City Manager
�b
FROM: Paul Oehme, Director of Public Works/City Engineer
DATE: May 23, 2016
SUBJ: Traffic Study along Market Boulevard between TH 5 and W. 78' Street
City Project PW236D
BACKGROUND
Building Inspections
On February 8, 2016, the City Council approved a consultant contract to complete a traffic
Phone: 952.227.1180
study for Market Boulevard from W. 79th Street to TH 5. This item is a Key Financial
Fax: 952.227.1190
Strategy item the City Council wished to complete in 2016.
Engineering
Phone: 952.227.1160
DISCUSSION
Fax: 952.227.1170
This study provided a summary of the following tasks that were performed:
Finance
Phone: 952.227.1140
• Existing Conditions Analysis
Fax: 952.227.1110
, Crash Analysis
Park & Recreation
• Future Conditions Analysis
Phone: 952.227.1120
Fax: 952.227.1110
Market Boulevard is a collector roadway with a variable cross-section between West 78th
Street and TH 5 near downtown Chanhassen. The study corridor is 1,500 feet long and
Recreation Center
has a posted speed limit of 30 mph. The existing ADT is approximately 15,000 on the
2310 Coulter Boulevard
south end of the corridor (TH 5) and approximately 10,700 on the north side of the
Phone: 952.227.1400
Fax: 952.227.1404
corridor (West 78th Street). The existing ADT on TH 5 is 30,000. An active railroad
crossing, operated by Twin Cities & Western Railroad (TWCR), exists 650 feet north of
Planning &
TH 5. The study intersections along Market Boulevard include the cross streets of West
Natural Resources
78th Street, Market Square Driveway, Market Street, Walgreens Driveway, West 79th
Phone: 952.227.1130
Street, and TH 5. The intersections of TH 5 and West 78th Street are both signalized,
Fax: 952.227.1110
while the remaining intersections are full access with side street stop control. The
Public Works
roadway is a combination of a four -lane divided section, four -lane undivided section, and
7901 Park Place
three -lane undivided section. Intersection turning movement counts were collected at all
Phone: 952.227.1300
intersections along the corridor.
Fax: 952.227.1310
Based on this information, AM and PM peak hour turning movement volumes were
Senior Center calculated for each of the study intersections. As expected, existing turning movement
Phone: 952.227.1125 counts at the PM peak hour volumes were significantly higher than the AM peak hour
Fax: 952.227.1110
volumes; therefore, the capacity analysis was performed for the PM peak hour only. The
Website capacity analysis was performed using Synchro/SimTraffic software to determine a
www.ci.chanhassen.mn.us baseline of operations at the study intersections. Based on the analysis, all intersection
movements are operating at LOS D or better, with the exception of the westbound left -
turn movement at the intersection of Market Boulevard & West 79th Street (LOS F).
Chanhassen is a Community for Life -Providing for Today and Planning for Tomorrow
Todd Gerhardt
Traffic Study along Market Boulevard
May 23, 2016
Page 2
The intersection of Market Boulevard and TH 5 is operating at LOS F, where the failing movements
occur along TH 5 mainline. The southbound approach movements all operate at LOS C or better.
Existing (2016) PM Peak Hour Delay and Level of Service Results
Intersection
Control
Approach
J
O
3erations by Movement
Overall Intersection
Left
Through
Right
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Market Blvd & W 78th St
Signal
EB
12.9
15.1
18.9
17.0
10.7
11.9
3.6
3.8
15.6
18.5
5.2
4.0
--
23.1
I
10.6 I
-- I
52.3
12.3 I
104.0
56.3
B
I B
I B
I B
I B
I B
I A
I A
I C
I C
I A
I A
C
I
B I
1-,
B I
1
E
16.1 B
I 10.3 I B
I 12.5 I B
I 11.4 I B
I 6.9 ( A
I 29.8 I D
I 0.9 I A
I 1.1 I A
I 24.6 I C
I 20.0 I C
I 2.0 I A
I 0.5 I A
-- I -
-- I I
0.5 I A I
0.6 I A I
I I
7.1 I A I
0.2 I A I
1 111.9
115.9
5.2
I 5.0 I
I 5.6 I
I 4.3 I
I 3.8 I
I 4.0 I
I 0.1 I
I 0.9 I
I 6.7 I
I 3.5 I
I 0.3 I
I 0.2 I
I -- I
4.3 I
0.2 I
I
7.9 I
6.0 I
I
25.9
46.6
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
C
D
12.2
I 1.9
I
2.7
0.9
I
8.2
823
B
A
A
A
A
WB
NB
SB
Market Blvd & Market Square
TWSC
EB
WB
NB
SB
Market Blvd & Market St
TWSC
EB
WB
NB
SB
Market Blvd & Walgreens
Driveway
TWSC
EB
WB
NB
SB
Market Blvd & W 79th St
TWSC
EB
WB
NB
SB
Market Blvd & MN 5
Signal
EB
WB
NB
35.5 D 30.5 C 3.3 A
32.2 I C I 27.4 I C I 2.4 I A
SB
Crash Analysis
Historic crash data was obtained for the previous five (5) year period using MnDOT's Crash
Mapping Analysis Tool (MnCMAT). Following is a summary of the data:
Market Boulevard & Trunk Highway 5 - Eighty Four (84) total crashes; nine right angle,
64 rear end, four left turn, and four sideswipe. The majority of the crashes at this intersection
are rear end crashes, which are indicative of an intersection with signalized control. The
intersection crash rate is at 0.99 crashes per million entering vehicles (MEV) with a statewide
critical rate (for a similar intersection) of 0.63, resulting in a critical index of 1.57. A critical
index greater than 1.0 means the intersection is operating outside the expected, normal range.
Market Boulevard & West 79th Street - Seven total crashes; three left turn, one head on,
one sideswipe, and two "other" crash types. Three of the seven crashes involved WB left -
turning traffic failing to yield to traffic. This could be the result of vehicles accepting smaller
than usual gaps in traffic and challenges with the curvature of Market Boulevard at West
79th Street.
Market Boulevard & Walgreens Driveway - Two total crashes; one sideswipe and one
right angle.
Market Boulevard & Market Street - Nine total crashes; six left turn, one right angle, one
rear end, and one sideswipe. The majority of crashes were the result of NB/SB left -turning
traffic conflicting with NB/SB through traffic. Of these six left -turn crashes, five of them
g:\eng\public\pw236d market boulevard improvements\052315 bkgd market traffic study.doc
Todd Gerhardt
Traffic Study along Market Boulevard
May 23, 2016
Page 3
occurred with major street left -turning vehicles colliding with opposing major street vehicles.
The major contributing factor to this trend is the lack of dedicated northbound and
southbound left -turn lanes, offset turning movements that reduce visibility of oncoming
traffic, and limited sight distance due to the intersection being on a curve.
Market Boulevard & Market Square — Four total crashes; one right angle, one read end,
one left -turn and one sideswipe.
Market Boulevard & West 78th Street — Seventeen total crashes; six right angle, five rear
end, three left turn, two sideswipe, and one head on. The majority of the crashes at this
intersection are indicative of an intersection with signalized control; right angle and rear end
crashes and no additional improvements are recommended.
Intersection crash rates were calculated at Market Boulevard and West 79th Street and
Market Boulevard and Market Street, which experienced the highest level of local road
crashes at non -signalized intersections. Based on MnDOT data, the statewide critical rate for
a similar intersection is 0.44 at West 79th Street and 0.42 at Market Street. Based on the
historic crash data, Market Boulevard and West 79th Street has a crash rate of 0.35 and
Market Boulevard and Market Street has a crash rate of 0.34. Although a review of crash
data shows that there are some trends that roadway improvements may positively impact, the
existing crash data does not show that there are any locations where there is a crash rate that
is significantly greater than similar facilities statewide.
Future Conditions Analysis
An analysis of future conditions of the study corridor was performed assuming a 20 -year horizon.
The purpose of the future conditions analysis is to determine potential capacity issues, review access
management, review turn lane needs, develop alternatives, and ultimately provide a recommendation
of a preferred alignment and cross-section of Market Boulevard.
Future Traffic Forecasts
In order to perform the 20 -year no -build horizon capacity analysis, future traffic volumes were
forecasted based on projected background growth and traffic from redevelopment projects. Existing
turning movement volumes were grown at an annual growth rate of 0.5%. This growth is consistent
with the City's Comprehensive Plan and a review of historic volume information along the corridor.
In addition to background growth, traffic volumes from proposed redevelopment in the area was
included. There were two redevelopment projects included in the forecast: the existing retail strip
mall along West 79th Street is being redeveloped into a fast-food restaurant with a drive through and
potential redevelopment between the movie theater and the dinner theater for 120 units of residential
with 20,000 sf of retail. The fast-food restaurant is anticipated to generate 160 net new trips during
the PM peak hour and the multi -family development is anticipated to generate 100 net new trips
during the PM peak hour.
Future No Action Traffic Analysis
Using the forecasted traffic volumes, a capacity analysis was performed using Synchro/SimTraffic 9
using forecasted volumes and existing intersection geometries. Based on the analysis, and similar to
gAeng\public\pw236d market boulevard improvements\052315 bkgd market traffic study.doc
Todd Gerhardt
Traffic Study along Market Boulevard
May 23, 2016
Page 4
existing conditions, all turning movements are anticipated to operate at LOS D or better with the
exception of the westbound left -turn movement at the intersection of Market Boulevard and West
79th Street (LOS F). Similar to existing conditions, the intersection of Market Boulevard and TH 5
is operating at LOS F, where the failing movements occur along TH 5 mainline.
The southbound approach movements all operate at LOS E or better.
Future Potential Improvements
A four -lane divided roadway was considered from West 78th Street to the TC&W Railroad tracks.
The section of Market Boulevard between the TC&W Railroad Tracks and TH 5 would generally
remain consistent with current conditions. For the four -lane alternative, no access control was
considered, so all the existing turning movements would be permitted. Based on a review of the
crash data (particularly at Market Street) and field observations, this roadway is more challenging to
drive due to the lack of left -turn lanes coupled with the curvature of the roadway. Dedicated left -
turn lanes on Market Boulevard were provided at all intersections and driveways within the study
area for this alternative. Providing dedicated left -turn lanes should reduce the number of left turn
crashes that occur with vehicles turning left from Market Boulevard to side -streets and provide an
easier roadway for drivers to navigate. Turn lanes also provide additional information regarding
what drivers on Market Boulevard are doing as they approach the stop controlled side street. This
allows drivers turning left onto Market Boulevard to have more confidence that left -turning vehicles
on Market Boulevard are indeed turning left, instead of solely relying on left -turn signals.
In general, dedicated right -turn lanes were considered but not included under the four -lane
alternative due to the potential impacts to the adjacent properties, and to provide a consistent feel
with surrounding roadways, such as West 78th Street and Great Plains Boulevard, where dedicated
right -turn lanes are infrequent. However, one dedicated northbound right -turn lane is recommended
at the intersection of Market Boulevard and West 79th Street due to a right -turn movement that is
over 100 vehicles during the PM peak hour and many of those vehicles are coming off TH 5 with
considerable speed. Also, the northbound approach at the intersection of Market Boulevard and W.
78th Street has a dedicated right -turn lane, which serves as the drop lane for the four -lane cross-
section. The proposed layout assumes that the existing dedicated right -turn lanes for the northbound
approach at Market Boulevard and Walgreen's Driveway and the southbound approached at Market
Boulevard and Market Square would be removed.
Rear end crashes are anticipated to decrease along the corridor since turning traffic will have
dedicated lanes to queue in.
Raised medians range from 10 feet to 22 feet wide are shown on the attached exhibit. The median
between West 79th Street and TH 5 will remain the existing width with concrete, and transition into
the wider landscaped median north of West 79th Street. At Market Boulevard and West 78th Street,
the widening would occur to the east and could lead to a deflection for northbound through traffic
with the northbound receiving lane and the potential conflict for northbound and southbound left -
turning traffic. The railroad crossing would be improved to meet quiet zone standards.
g:\eng\pub1ic\pw236d market boulevard improvements\052315 bkgd market traffic study.doe
Todd Gerhardt
Traffic Study along Market Boulevard
May 23, 2016
Page 5
Future Build Traffic Analysis
Using the forecasted traffic volumes, a capacity analysis was performed using Synchro/SimTraffic
using forecasted volumes and proposed intersection geometries. Based on the analysis, there is
generally improved operations as compared to the future no -action conditions. All turning
movements are anticipated to operate at LOS D or better with the exception of the westbound left -
turn movement at Market Boulevard and West 79th Street (LOS F) and the eastbound -westbound
through movements at Market Boulevard and Market Street. The through movements are not a
concern because there is less than five vehicles during the PM peak hour making those movements.
Similar to no -action conditions, the intersection of Market Boulevard and TH 5 is operating at LOS
F, where the failing movements occur along TH 5 mainline. The southbound approach movements
all operate at LOS E or better.
Future 4 -Lane Alternative (2036) PM Peak Hour Delay and Level of Service Results
Intersection
Control
Approach
O
3erations by Movement
Overall Intersection
Left
Through
Right
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Delay
(sec/veh)
LOS
Market Blvd & W 78th St
Signal
EB
17.4
18.3
24.4
17.4
16.0
11.5
4.6
3.7
23.4
26.8
5.3
6.0
14.8
6.3
--
54.6
--
11.0
134.9
88.8
B
I B
I C
I B
I C
I B
I A
I A
I C
I D
I A
I A I
I I
I B I
I I
I A I
I I
I B I
23.7 C
I 14.2 I B
I 13.8 I B
I 14.6 I B
I 18.3 I C
I 22.1 I C
I 0.5 I A I
I 1.0 I A I
I 42.6 I E I
I 50.0 I E I
I 1.0 I A I
0.5 I A I
I I
I I
0.5 I A I
0.3 I A I
I I I
4.7 I A I
0.4 I A
108.8
116.3
5.2
I 6.9
I 6.0
I 6.5
I 4.0
I 5.9
0.2
0.9
6.9
11.3
0.4
0.3
5.4
0.2
10.1
4.0
40.7
61.7
A
I A
I A
I A
I A
I A
I A
I A
I A
I B
I A
I A
I
I A
I A
I
I B
I A
D
E
16.0
I
2.1
2.8
0.6
7.4
89.6
B
A
A
A
A
WB
NB
SB
Market Blvd & Market Square
TWSC
EB
WB
NB
SB
Market Blvd & Market St
TWSC
EB
WB
NB
SB
Market Blvd & Walgreens
Driveway
TWSC
EB
WB
NB
SB
Market
Market Blvd & W 79th St
TWSC
EB
WB
NB
SB
Market Blvd & MN 5
Signal
EB
WB
NB
54.8 D 58.4 E 3.6 A
50.2 I D 1 56.0 I E I 3.7 I A
SB
Opinion of Improvement Cost
The cost to construct the recommended alternative is estimated to be $3,200,000 which includes a
20% contingency and 25% indirect costs.
The intersection of TH 5 and Market Boulevard is the jurisdiction on MnDOT and was not included
in the scope of this study for potential improvements.
Attachments: Exhibits
g:\eng\public\pw236d market boulevard improvements\052315 bkgd market traffic study.doc
OO
OO O W 78th Street
MOW TO scAce . amu:. O , r� _
oil ;,�- F
O
art 1100
r� n • t •
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- ►�� � ei�r , s
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LEGEND
O = Right Angle
O= Rear End
O = Left Turn Into Traffic
O= Sideswipe Passing
O = Head On
O = Other
'fit:?•
r
Wunkghway'S
rQ 64
O
lie
Exhibit 4
Intersection Crash Summary
Kimley>>> Horn Market Boulevard Corridor Study, Chanhassen, MN
`Y W 7,8th;Street', t •. 'k �� ' tom. q..t
a E! F
my 6.8(A) 6.0 (A) '
15.0 (B) � v f 24.0 (C)
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15.3 (C) •� • ;- _�a .."1 Ca
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Exhibit 7
Horizon Year No -Action (2036) Intersection Delay and LOS
Kimley o Horn Market Boulevard Corridor Study, Chanhassen, MN
a
W ?h StVeet Q w o
t
o 29.0 (D)
��
KOl
-50.5(D)
(-106.1 (F)
L104.6 (F)
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73.1 (E)
}
- 113.4 (F)
¢¢
107.9 (F)
)
37.7 (Dcj
oma
oKnn
no
Trunk Highway
•
LEGEND
x (Z)
X = Total Delay/Vehicle (s)
,
Z = Level of Service
Exhibit 7
Horizon Year No -Action (2036) Intersection Delay and LOS
Kimley o Horn Market Boulevard Corridor Study, Chanhassen, MN
0 25 50 100
H081I0HTAL
SCALE IN FEET
MARKET BOULEVARD RECOMMENDED EXHIBIT
Kimle >>> Hrn o 4 -LANE 8
y CORRIDOR STUDY ALIGNMENT