I-89 Exit 12 /VT 2A Scoping Study - CCRPC · 2013. 10. 24. · VT 2A/New Street Intersection ALT A:...
Transcript of I-89 Exit 12 /VT 2A Scoping Study - CCRPC · 2013. 10. 24. · VT 2A/New Street Intersection ALT A:...
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I-89 Exit 12 /VT 2A Scoping Study Alternatives Presentation Williston Selectboard October 21, 2013
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Presentation Overview
Project Introduction, Background & Timeline
Meeting Objective & Next Steps
Review of Alternatives
Questions & Comments
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Project Introduction & Background
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Investigate transportation alternatives that address existing & projected traffic congestion, enhance safety for all users, improve bike-pedestrian connections through the interchange, and accommodate economic growth in the area.
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Project Timeline
Project Start-Up, Data Gathering May
Public Meeting #1, Existing Conditions & Issues June
Alternatives Development & Evaluation July - September
Public Meeting #2 – Alternatives Review/P&N October 1st
Selectboard Alternatives Presentation October 21st
Draft & Final Scoping Report December/January
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Meeting Objective and Next Steps
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Tonight’s Objective Review Project Alternatives
— Different alternative components – phased approach — Short/medium-term and longer-term alternatives — Review alternative performance, impacts and costs
Receive & Address Selectboard’s preliminary comments Next Steps
Selectboard Selection of Preferred Alternative(s): November 4th — As the Exit 12 Project moves into the NEPA phase of project development, the
preferred alternative might change based on more detailed environmental and other resource impact evaluation
— There will be constant communication between VTrans, FHWA and Williston Exit 12 Presentation to CIRC Alternatives Task Force: November 7th CIRC Alternatives Phase 3 Implementation Package: November 21st Draft & Final Scoping Report: December/January
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VTrans Project Development Process
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The process can take anywhere from 3 to 6 years depending on NEPA (CE, EA or EIS), ROW, and other issues
Project Definition (Scoping/Conceptual Design/NEPA)
Design: Preliminary & Semi-Final Project Plans
Right-of-Way Acquisition
Final & Contract Plans
Construction
Project Selection and Authorization to Proceed
Act 250
Local Permits
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What is a Scoping Study?
Project Identification
Project Definition/
Scoping
Design & Construction
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Overview of Alternative Components
Exit 12 Interchange
Shared-use Path Extension
New (Local) Street
Short/Medium Term Alternative: Interchange: Additional approach lanes Shared-Use Path: State Police to Hurricane Lane New Street: Harvest Lane to Maple Tree Place VT 2A/New Street Intersection
□ ALT A: Signalized Intersection □ ALT B: Underpass & roundabouts
VT 2A / New Street Intersection
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Overview of Alternative Components
Exit 12 Interchange
VT 2A Boulevard
Short/Medium Term Alternative: Interchange: Additional approach lanes Shared-Use Path: State Police to Hurricane Lane New Street: Harvest Lane to Maple Tree Place VT 2A/New Street Intersection
□ ALT A: Signalized Intersection □ ALT B: Underpass & roundabouts
Longer-Term Alternative 1: Interchange: Expanded diamond interchange with
bicycle and pedestrian facilities VT 2A Boulevard: New Street to US 2
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Overview of Alternative Components
Exit 12 Interchange
VT 2A Boulevard
Short/Medium Term Alternative: Interchange: Additional approach lanes Shared-Use Path: State Police to Hurricane Lane New Street: Harvest Lane to Maple Tree Place VT 2A/New Street Intersection
□ ALT A: Signalized Intersection □ ALT B: Underpass & roundabouts
Longer-Term Alternative 1: Interchange: Expanded diamond interchange with
bicycle and pedestrian facilities VT 2A Boulevard: New Street to US 2 Longer-Term Alternative 2: Interchange: Diverging diamond interchange (DDI)
with bicycle and pedestrian facilities VT 2A Boulevard: New Street to US 2
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Short/Medium Term Alternative: Exit 12 Interchange
Additional southbound
lane
Shared-use path for bicycles/peds
from Police Barracks to
Hurricane Lane
Existing interstate bridges
Adjust signal timings
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Short/Medium Term Alternative: Shared Use Path
Hurricane Lane
Fairfield Inn
Home Depot
State Police
Residence Inn
Courtyard Marriot
10’ Shared-Use Path
Pedestrian signals &
crosswalks
Path behind Interstate
bridge piers
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Short/Medium Term Alternative: New Street Configuration
Single-lane roundabouts
Future connection
2-lane street with sidewalks
Connection to Police Barracks
Connection to Maple
Tree Place
NEW STREET
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New Street Alternative A: Signalized Intersection
Shared-use Path
Connection to Police Barracks Signalized
Intersection
Sidewalks
NEW STREET
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New Street Alternative B: Underpass and Roundabouts
Single-lane roundabouts
Ramp down to New Street
Underpass
Ramp up to VT 2A
Shared-use Path
Landscaped median
Connection to Police Barracks
Additional southbound
lane
NEW STREET
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Comparison of New Street / VT 2A Intersection Alternatives
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Overview of Alternative Components
Exit 12 Interchange
VT 2A Boulevard
Short/Medium Term Alternative: Interchange: Additional approach lanes Shared-Use Path: State Police to Hurricane Lane New Street: Harvest Lane to Maple Tree Place VT 2A/New Street Intersection
□ ALT A: Signalized Intersection □ ALT B: Underpass & roundabouts
Longer-Term Alternative 1: Interchange: Expanded diamond interchange with
bicycle and pedestrian facilities VT 2A Boulevard: New Street to US 2 Longer-Term Alternative 2: Interchange: Diverging diamond interchange (DDI)
with bicycle and pedestrian facilities VT 2A Boulevard: New Street to US 2
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Longer-Term Alternative 1: Exit 12 Interchange – Expanded Diamond
Additional on-ramp
lane Additional
right-turn lane (as needed)
Dual southbound
left-turn lanes
Additional southbound
lane
Shared-use path for
bikes/peds
New interstate bridges
Exclusive northbound left-turn lane
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Longer-Term Alternative 2: Exit 12 Interchange – Diverging Diamond
Shared-use path for
bikes/peds
Additional southbound
lane
Additional right-turn lane
(as needed)
New interstate bridges
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Longer-Term Alternative 2: Exit 12 Interchange – Diverging Diamond
Shared-use path for
bikes/peds
Additional southbound
lane
Additional right-turn
lane
New interstate bridges
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Safety Considerations for Diamond Interchange vs DDI
Diamond Interchange Total Conflict Points: 30
Diverging Diamond Interchange Total Conflict Points: 18
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Comparison of Interchange Alternatives
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Longer-Term Alternative 1 or 2: VT 2A Boulevard
Existing Cross-Section
Proposed Cross-Section (New Street to Taft Corners)
Additional pedestrian-scale
streetscaping
Raised landscaped
median Bike lanes
Enhanced transit
amenities
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VT 2A Boulevard – Looking North from Marshall Avenue
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Congestion Summary – Future Conditions
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Congestion Summary – Future Conditions
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Congestion Summary – Future Conditions
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Preliminary Cost Estimates / Proposed Phasing
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Evaluation Matrix
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Questions ?
Comments
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Exit 12 Purpose & Need Statement
PURPOSE The purpose of the Exit 12 Project is to develop transportation system improvements that enhance safety for all users; reduce traffic congestion and facilitate mobility for people and goods; improve bicycle and pedestrian network connectivity; and accommodate economic growth in the Exit 12 interchange area and VT 2A corridor (in the vicinity of the exit).
NEEDS Improve safety for all users in the project area Address the High Crash Locations in the project area Provide for safe and efficient bicycle and pedestrian travel
Reduce traffic congestion and enhance mobility for all users in the project area Roadway improvements to reduce congestion & improve efficiency of the highway
system Develop bicycle and pedestrian facilities that connect the existing shared use paths and
sidewalks north of Exit 12 with destinations south of the interchange. Accommodate Economic Growth in the project area Provide the necessary infrastructure to support Williston’s plan for dense mixed-use
development in the Designated Growth Center