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I‐90 Exit 59 (La Crosse Street)Interchange Options Study
Public Open House #2February 12, 2014: 5:30 PM – 7:00 PM
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Study Area
Study Area: I‐90
Vicinity of La Crosse Street La Crosse Street
Eglin Street to Disk Drive
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Study Partners
Advisory Agencies:• South Dakota Department of Transportation (SDDOT)• City of Rapid City• Rapid City Area MPO• Federal Highway AdministrationConsultant Team:• HDRPublic Members/Stakeholders:• Landowners and Business Owners• Traveling Public and Concerned Citizens
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Study Contacts
SDDOT Project Manager:Steve Gramm, PEProject Development, Data Analysis [email protected]: 605‐773‐6641
Consultant Team Contacts:Jody Page, PE Brian RayContract Manager Project [email protected] [email protected]: 605‐791‐6100 Phone: 402‐548‐5066
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Why the Study?
South Dakota Decennial Interstate Corridor Study (2010)
• Review of Findings:– Interchange serves the growing north‐northeast edge of the community
– Interchange is becoming increasingly congested– Interchange has elevated crash rates– Adjacent access is below minimum standard
• Recommendations:– Interchange improvements to improve capacity and improve safety
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What is the Purpose and Need for this Project?
• Improve capacity • Improve safety
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Study Process
July / October 2012 – Data Collection (completed)October / November 2012– Traffic Assessment (completed)November 28 / 29, 2012– Public and Stakeholder Meetings (completed)December 2012 / December 2013 – Develop Alternatives (completed)February 2014 – Public and Stakeholder MeetingsMarch / May 2014 – Refine and Analyze AlternativesJune / July 2014 – Public MeetingAugust / September 2014 – Complete Study DocumentOctober 2014 – Present Final Study and Make Recommendations
Study Process / Timeline:
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Developmentof
Alternatives
Consensus on Study Approach and Scope
Consensus on Purpose and Need
Consensus on Final Alternatives
Consensus on Evaluation
Implied Consent
Purposeand
NeedScoping Draft
Document
Selectionof the
PreferredAlternative
Evaluationof
AlternativesFinal
Document Cat-Ex
Steps of the Environmental Process
WE ARE HERE
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Existing Traffic Assessment
• All Study Area Intersections Operate at Level of Service ‘C’ or Better
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Existing Traffic Assessment
La Crosse Street
La Crosse Street / I‐90 Westbound Ramp
• Northbound Left Turn Vehicles Exceed Capacity
• Blocks Northbound Inside Through Lane
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2035 Traffic Assessment(No‐Build)
• Traffic Volumes Projected to Increase between 35% to 65% on La Crosse by 2035
• La Crosse/I‐90 Eastbound Ramp Intersection – LOS ‘D’ (PM Peak)
• Multiple Individual Movements LOS ‘F’ (PM Peak)
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2035 Traffic Assessment(No‐Build)
La Crosse Street
Vehicle Queue Exceeds Available Storage at Multiple Locations:
• La Crosse Street/I‐90 EB Ramps • Eastbound Left/Right Turn Lanes• Southbound Left Turn Lane
• La Crosse Street/I‐90 WB Ramps• Northbound Left Turn Lane
N
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Control of Access
SDDOT Roadway Design Manual – Control of Access
* These distances are considered minimum per the current AASHTO A Policy on Design Standards Interstate System, July 2005
*
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Interchange Options
Option 1• Diamond Interchange
Option 2a, 2b, 2c• Single Point Urban Interchange
Option 3a, 3b• Diverging Diamond Interchange
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Interchange Option 1
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Interchange Option 2a
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Interchange Option 2b
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Interchange Option 2c
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Interchange Option 3a
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Interchange Option 3b
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Next Steps
• Obtain & Review Public Comments and Ideas
• Refine Concepts and Evaluate• Review Environmental Impacts• Conduct Evaluation
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Project Website
http://www.sddot.com/transportation/highways/planning/specialstudies/lacrosse/default.aspx
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Comment Form
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I‐90 Exit 59 (La Crosse Street)Interchange Options Study
THANK YOU FOR PARTICIPATING!