march 1, 2011. why an interchange at this location? th 15 corridor study 2007 nine signalized...
TRANSCRIPT
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March 1, 2011
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Why an interchange at this location?• TH 15 Corridor Study 2007• Nine Signalized intersections• Six in Top 50 High Crash Cost• Study outcome = convert to freeway
– Price tag $300 Million+– Phased construction where possible
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Why an interchange at this location?• TH 15 & Stearns CSAH 120• Border between Sartell and St. Cloud• Medical Campus’s on west side
– +$70 million construction • 100 Acre retail complex under construction on east
side– Sam’s Club, Super WalMart, assorted smaller retail
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Why an interchange at this location?
• NB dual left turn lanes 1500’ length• Signal at 81% capacity• Future volumes
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Why an interchange at this location?• Greater Minnesota Interchange
Solicitation– Promote Economic Development– Safety Concerns– $10 million– Local cost participation
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Why a Diverging Diamond Interchange?
• Standard Diamond Signals vs
Roundabouts? High left turn volumes Eight lane bridge
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Why a Diverging Diamond Interchange?
• Single Point Diamond – Better capacity– Big bridge– Higher Cost– Can’t expand
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Why a Diverging Diamond Interchange?• DDI
– Moves more traffic with fewer lanes
– Smaller bridge– Removes left turns –
fewer crashes and less delay
– Reserve capacity– 18 conflict points vs 30
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Design Constraints• Awkward county road alignment• Existing commercial development• Two neighborhoods in SE quadrant, one a
potential environmental justice issue• Sauk River• Utility crossing• Pond• Water Table?
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Design Constraints
Medical Clinics
Sam’s Club
CentraCare
Hennen’s
Neighborhoods
Co. Rd 120
TH 15
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Current Layout
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Public Meeting
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Public Meeting
Meeting Outcome
- Positive comments- Build it Now!- Online links to video from Missouri sold the concept
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I-270 & Dorsett Road - St. Louis, Missouri – Aerial
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I-44 and Route 13 Springfield, Missouri – Driver’s View
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