HomeMy WebLinkAbout2.a. Request for Shannon Parkway RedesignAGENDA ITEM: Request for Shannon Parkway Redesign
AGENDA SECTION:
PREPARED BY: Andrew J. Brotzler, PE, City Engineer
AGENDA NO. 9,k
ATTACHMENTS: Resident Letter, Memorandum
APPROVED BY:
RECOMMENDED ACTION: Discussion
ROSEMOUNT
CITY COUNCIL
City Council Special Work Session: October 14, 2008
EXECUTIVE SUMMARY
BACKGROUND:
As previously forwarded to Council, attached is a letter from Mr. Joe Spah, 14165 Crocus Way regarding
concerns with traffic operation and patterns on Shannon Parkway between 145 Street and Connemara
Trail. Excessive speed on Shannon Parkway is noted as the primary concern on this segment of Shannon
Parkway.
Following is background information on this segment of Shannon Parkway.
Roadway constructed in 1988.
Originally stxiped with 4 lanes.
Roadway was designed as and is classified as a collector roadway within the city transportation system.
As a designated collector roadway, designed to accommodate higher traffic volumes and speeds vs.
local residential street designs.
Posted speed limit per Minnesota Department of Transportation Speed Authorization is 40 MPH.
Bituminous trail located on the east side of roadway; city trail system plan proposes a future
bituminous trail for the west side of roadway.
Attached for Council information and consideration is a memorandum from Chuck Rickart with WSB
Associates, Inc. The memorandum provides an overview of the existing conditions and a summary of the
advantages /disadvantages for 1) Existing Conditions; 2) Three -Lane Section; and 3) Two Lanes with
Median.
SUMMARY:
Staff will review the attached information with Council and is requesting Council direction and feedback
on this matter.
G: \Streets \Shannon Pkwy RedesignCWS10- 14- 08.doc
Brotzler, Andy
From: joespah @yahoo [joespah @yahoo.com]
Sent: Monday, August 25, 2008 10:47 AM
To: Brotzler, Andy
Subject: Request for Shannon Parkway Redesign
Attachments: Shannon Pkwy Request, 8- 25- 08.PDF
Shannon Pkwy
Request, 8- 25- 08....
Mr Brotzler,
Attached is the letter we discussed in your office on Friday, August 22, 2008 regarding the request to look at some
alternate design options for Shannon Parkway from 145th to Connemara.
In talking with area residents I was a bit surprised to find out that this issue carries some pretty strong sentiment within the
adjacent community. In a few instances, I was given quite a lecture from a few individuals who claimed to have brought
this issue before Council (with similar concems) previously. Additionally, a few residents mentioned that they have made
similar general complaints to the City. I wanted to bring this to your attention simply to assure you that my intentions are
not to stir up any contentious issues here, but rather address a few safety concerns regarding Shannon Parkway, and work
with the City in doing so. I simply feel there is quite a bit of potential to improve the existing design, and yet maintain the
overall operation of the roadway for its intended use. I hope you agree.
Hopefully this list of residents who are interested in this issue will be viewed as a general indication of those who would
support such an effort.
If you require a more official (original) paper copy of this information, please let me know and I would be more than happy
to mail it to you.
Thanks again for your time on Friday to discuss my interests in considering options for improving Shannon Parkway.
Best Regards,
Joe Spah
Resident, 14165 Crocus Way
1
14165 Crocus Way
Rosemount, MN 55068
August 23, 2008
Andrew J. Brotzler, P.E.
City Engineer
2875 145 Street West
Rosemount, MN 55068 -4997
Mr. Brotzler:
On behalf of the many Rosemount residents living along Shannon Parkway, lam writing
to express our concerns regarding the overall design and safety of the section of the
Parkway extending from Connemara to 145 Street.
We believe the current roadway alignment (straight) and wide Zane configurations have
contributed to excessive travel speeds, which are commonly observed, and otherwise
inappropriate driving behavior. Although periodically increasing law enforcement
presence reinforces road regulations, it appears to offer little residual benefit in terms of
ensuring an inherently safe roadway and neighborhood use of adjacent walking paths.
As we have witnessed over the past year and a half, the current road design has played
a significant role in at least (2) major accidents where a significant injury or property
damage was caused. We believe this is unacceptable for a residential street.
Therefore, we, the residents, would like to propose initiating a cost effective re- design of
Shannon Parkway between Connemara and 145 Street. We feel that narrowing and
eliminating lanes (examining the use of a 3 lane configuration), adding bicycle lanes,
and /or installing new center islands could contribute to an efficient overall solution to the
existing roadway design. We, the residents, would welcome an opportunity to work in
collaboration with the City of Rosemount, and any designated design professionals, to
explore all potential design solutions that will calm traffic and enhance the safety of the
Parkway for motorists and pedestrians.
Attached is a list of signatures of those residents who support this proposal, and look
forward to your response.
Thank you for your time and consideration.
Since ely,
Joe A. Spah, P.E.
On behalf of Rosemount Residents Living along Shannon Parkway, between Connemara and 145"' Street
Enclosure(s): Resident Signatures in Support of the Shannon Parkway Redesign Proposal
No.
NAME (Meese Print)
First Last
ADDRESS
House No. Street
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Residents who support the redesign of Shannon Parkway from Connemara to 145th Street.
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160`" St. (CSAH 46)
to South of 145
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Memorandum Andy Brotzler, PE
October 10, 2008
Page 3
2. Three -Lane Section (existing width) This alternative would involve restriping the
existing roadway within the existing 50' pavement width. The resulting cross section
would include two lanes in each direction with a continuous center left-turn lane and
a six- to seven -foot shoulder on each side of the roadway.
3. Two Lanes with Median This alternative would involve providing two lanes in each
direction with a raised concrete median in the center of the roadway. Left-turn lanes
would be developed at each intersection in the corridor. The outside curb would
remain in place. This would result in a two- to four -foot shoulder on either side of the
corridor.
Conclusions Recommendation
Based on the existing conditions and analysis discussed above, it can be concluded that, although
the existing lane configuration is not ideal between Connemara Trail and 145 Street with
respect to lane continuity north and south, the magnitude of the disadvantages is less than
reconstruction or restriping of the corridor. In addition, the crash history indicates that the
majority (67 of the crashes have occurred at controlled intersections which would not change
with the restriping or reconstruction alternatives. Therefore, based on the review of the corridor,
it is recommended that no changes be made to the corridor at this time.
Advantages
Disadvantages
Added shoulder for pedestrians or bikes.
Traffic will use the narrow shoulder for
right turns. Vehicles will bypass on left
using the left -turn lane.
All traffic in one lane improves visibility
for crossing Shannon Parkway.
Additional cost for restriping ($25 to
$50K).
Cross section will accommodate the
existing and future projected ADT.
Center left -turn lane on crown of roadway.
Improved lane continuity north and south.
Speed of traffic will increase with little
impediment to through traffic.
Memorandum Andy Brotzler, PE
October 10, 2008
Page 3
2. Three -Lane Section (existing width) This alternative would involve restriping the
existing roadway within the existing 50' pavement width. The resulting cross section
would include two lanes in each direction with a continuous center left-turn lane and
a six- to seven -foot shoulder on each side of the roadway.
3. Two Lanes with Median This alternative would involve providing two lanes in each
direction with a raised concrete median in the center of the roadway. Left-turn lanes
would be developed at each intersection in the corridor. The outside curb would
remain in place. This would result in a two- to four -foot shoulder on either side of the
corridor.
Conclusions Recommendation
Based on the existing conditions and analysis discussed above, it can be concluded that, although
the existing lane configuration is not ideal between Connemara Trail and 145 Street with
respect to lane continuity north and south, the magnitude of the disadvantages is less than
reconstruction or restriping of the corridor. In addition, the crash history indicates that the
majority (67 of the crashes have occurred at controlled intersections which would not change
with the restriping or reconstruction alternatives. Therefore, based on the review of the corridor,
it is recommended that no changes be made to the corridor at this time.
Advantages
Disadvantages
Most efficient and safe traffic operations.
High cost ($750 to $1,000K).
All traffic in one lane improves visibility
for crossing Shannon Parkway.
Rear -end crashes could increase with no
area (left or right) to bypass slower
vehicles.
Cross section will accommodate the
existing and projected ADT.
Additional construction north and south to
match existing cross section.
Memorandum Andy Brotzler, PE
October 10, 2008
Page 3
2. Three -Lane Section (existing width) This alternative would involve restriping the
existing roadway within the existing 50' pavement width. The resulting cross section
would include two lanes in each direction with a continuous center left-turn lane and
a six- to seven -foot shoulder on each side of the roadway.
3. Two Lanes with Median This alternative would involve providing two lanes in each
direction with a raised concrete median in the center of the roadway. Left-turn lanes
would be developed at each intersection in the corridor. The outside curb would
remain in place. This would result in a two- to four -foot shoulder on either side of the
corridor.
Conclusions Recommendation
Based on the existing conditions and analysis discussed above, it can be concluded that, although
the existing lane configuration is not ideal between Connemara Trail and 145 Street with
respect to lane continuity north and south, the magnitude of the disadvantages is less than
reconstruction or restriping of the corridor. In addition, the crash history indicates that the
majority (67 of the crashes have occurred at controlled intersections which would not change
with the restriping or reconstruction alternatives. Therefore, based on the review of the corridor,
it is recommended that no changes be made to the corridor at this time.
Memorandum Andy Brotzler, PE
October 10, 2008
Page 2
As can be seen, the current roadway width for the 145 Street to Connemara Trail section is 50'
with two lanes in each direction and no shoulders (constructed in 1988). This section of roadway
has the widest cross section in the entire corridor. In addition, similar to the sections north and
south in the corridor, there is only a pathway sidewalk on the east side of the roadway. The
existing average daily traffic in this section is 6,600 vehicles per day.
A crash investigation of the existing corridor was also completed. The table on page 4 illustrates
the summary of the crashes throughout the corridor. The previous three years data is recorded.
As can be seen from the table, the majority of the crashes in the corridor have occurred between
160 Street (CSAH 46) and 145 Street which includes the CSAH 42 intersection. In the
corridor between 145 Street and Connemara Trail, there have been 13 crashes in the past three
years. The majority of the crashes (67 have occurred at the controlled intersections of 145
Street and Connemara Trail. Of the total crashes, 12 were property damage and one included a
personal injury. There were also two pedestrian crashes, although no injuries were reported as
part of the crash report. Both of the pedestrian crashes occurred at the 145 Street intersection
which is controlled with an all -way stop.
Considered Alternatives
Several alternatives could be implemented in the Shannon Parkway corridor to revise the
existing lane configurations. Each of these alternatives, including their advantages and
disadvantages, are discussed below:
1. Four -Lane (existing conditions) This alternative would maintain the existing lane
configuration through the corridor.
Advantages
Disadvantages
Additional thru lane available for bypass of
turning vehicles.
Visibility of vehicles in two lanes can be
poor for pedestrian crossing Shannon
Parkway.
No cost.
No shoulder for pedestrians or bikes.
Cross section will accommodate existing
and projected ADT.
Lane continuity north and south.
Memorandum Andy Brotzler, PE
October 10, 2008
Page 2
As can be seen, the current roadway width for the 145 Street to Connemara Trail section is 50'
with two lanes in each direction and no shoulders (constructed in 1988). This section of roadway
has the widest cross section in the entire corridor. In addition, similar to the sections north and
south in the corridor, there is only a pathway sidewalk on the east side of the roadway. The
existing average daily traffic in this section is 6,600 vehicles per day.
A crash investigation of the existing corridor was also completed. The table on page 4 illustrates
the summary of the crashes throughout the corridor. The previous three years data is recorded.
As can be seen from the table, the majority of the crashes in the corridor have occurred between
160 Street (CSAH 46) and 145 Street which includes the CSAH 42 intersection. In the
corridor between 145 Street and Connemara Trail, there have been 13 crashes in the past three
years. The majority of the crashes (67 have occurred at the controlled intersections of 145
Street and Connemara Trail. Of the total crashes, 12 were property damage and one included a
personal injury. There were also two pedestrian crashes, although no injuries were reported as
part of the crash report. Both of the pedestrian crashes occurred at the 145 Street intersection
which is controlled with an all -way stop.
Considered Alternatives
Several alternatives could be implemented in the Shannon Parkway corridor to revise the
existing lane configurations. Each of these alternatives, including their advantages and
disadvantages, are discussed below:
1. Four -Lane (existing conditions) This alternative would maintain the existing lane
configuration through the corridor.
160 St. (CSAH 46) CSAH 42
Width
Lanese
Shoulder
Path/
dewall
Limit
ADT
Driveways
38'
2
6
Both
40
5,700
0
CSAH 42 145 Street
40'
2
8
East
40
6,500
0
145 Street Connemara Trail
50'
4
0
East
40
6,600
0
Connemara Trail McAndrews
Rd (CSAH 38)
44' 48'
2
10 —12
East
35 40
3,500
42
WSB
AMEMEK
Associates, Inc.
Memorandum
Infrastructure Engineering Planning Construction
To: Andy Brotzler, PE
City Engineer
City of Rosemount
From: Chuck Rickart, PE, PTOE
Transportation Engineer
Date: October 10, 2008
Re: Shannon Parkway —145 Street to Connemara Trail
City of Rosemount, MN
WSB Project No. 1005 -99
701 Xenia Avenue South
Suite #300
Minneapolis, MN 55416
Tel: 763 541 -4800
Fax: 763 541 -1700
The geometrics (lane configuration) and operation of Shannon Parkway through the City of
Rosemount has been discussed for several years. This has included a previous review of a
continuous center left -turn lane from CSAH 46 (160 Street) to McAndrews Road (CSAH 38).
Review of this configuration in 2004 concluded that a three -lane section for the entire length of
this corridor was not justified.
Recently, the City received a request to evaluate the operation and safety of the four -lane section
of Shannon Parkway between 145 Street and Connemara Trail. The following sections of this
memorandum outline the findings of that analysis, conclusions, and recommendations.
Existing Conditions
The following table illustrates the existing conditions on Shannon Parkway from 160 Street
(CSAH 46) to McAndrews Road (CSAH 38). The table illustrates, not only the 145 Street to
Connemara Trail conditions, but the other conditions in the corridor for comparison purposes.
Shannon Parkway
Existing Conditions
Roadway width at major intersections 'ncreases.
121 T urn lanes are added at major intersections.
(3) 35 mph Connemara Trail to Evermoor Parkway, 40 mph Evermoor Parkway to CSAH 38.
ACEC 2008 Firm of the Year