i-90 exit 406 interchange modification study and ......market public meeting & open house #2...
TRANSCRIPT
MARKET
Public Meeting &
Open House #2
I-90 EXIT 406 INTERCHANGE
MODIFICATION STUDY AND
ENVIRONMENTAL ASSESSMENT
JANUARY 23, 2017
PRESENTATION WILL BEGIN AT APPROXIMATELY 6:05 P.M.
I-90 Exit 406 IMJR and EA
TODAY’S MEETING
Purpose: Gather feedback for further refinement and screening of “Build Alternatives.”
1. Overview of study
2. Interchange and Corridor Alternatives development process
3. Presentation of Interchange and Corridor “Build Alternatives”
No preferred alternatives have been identified at this point
I-90 Exit 406 IMJR and EA
STUDY TEAM
• Study Advisory Team • South Dakota Department of Transportation (SDDOT)
• Federal Highway Administration (FHWA)
• Sioux Falls Metropolitan Planning Organization (MPO)
• City of Brandon
• Study Consultant • HR Green
• Short Elliott Hendrickson (SEH)
• 106 Group
I-90 Exit 406 IMJR and EA
INTERCHANGE IMPROVEMENTS TIMELINE
• Study – 2016-2017
• Design
• Construction – letting in FY 2022-2025
I-90 Exit 406 IMJR and EA
ENVIRONMENTAL ASSESSMENT
A. To determine the significance of impacts from proposed action
A. Establish Purpose and Need
B. Develop and evaluate alternatives
C. Identify significance of environmental outcomes
D. Resource agency consultation and public involvement
B. Conclusion - EIS or FONSI
I-90 Exit 406 IMJR and EA
INTERCHANGE MODIFICATION JUSTIFICATION
REPORT (IMJR)
A. 8 policy requirements for new or change in access
A. Sufficient design and support to substantiate request
B. Detailed technical analysis
B. Concurrent with and feeds into Environmental
Assessment
I-90 Exit 406 IMJR and EA
STUDY AREA
• I-90 Exit 406 Interchange
• SD 11 / Splitrock Blvd
I-90 Exit 406 IMJR and EA
A. Establish issues and needs
B. Concept development and initial
screening
C. Refine Build Alternatives and
analysis
D. IMJR and EA development;
identify proposed Preferred Alternative
Complete
Complete
In progress –
February 2017
February 2017 – July 2017
STUDY ACTIVITIES AND SCHEDULE
I-90 Exit 406 IMJR and EA
ALTERNATIVES DEVELOPMENT • Future-year traffic volumes
• NB to WB movement
• EB to SB movement
• Ramp terminal intersection sight angles
• Vehicle-vehicle conflict locations
• Large truck turning movements
• Continuous pedestrian/bicycle accommodations
• On- and off-ramp lengths
I-90 Exit 406 IMJR and EA
ALTERNATIVES DEVELOPMENT
Maintenance of traffic
• Full closure with detour routes
• Temporary bridge
• Existing bridge
I-90 Exit 406 IMJR and EA
PRELIMINARY CONCEPT SCREENING
A. Interchanges: 11
B. Corridors: 4
C. Notable differentiators • Transmission tower
impacts
• Right-of-way needs
• Bridge area
• Cost
• Cultural resources
4 Build Alternatives Carried Forward
3 Build Alternatives Carried Forward
I-90 Exit 406 IMJR and EA
BUILD ALTERNATIVES
• Interchange Alternatives
• Corridor Alternatives
I-90 Exit 406 IMJR and EA
STANDARD DIAMOND I-90 EXIT 406 INTERCHANGE
• Signalized ramp terminals
• Dual NB to WB left-turn
lanes
• Free EB to SB right-turn
• Maintain traffic via
temporary bridge or detours
I-90 Exit 406 IMJR and EA
STANDARD DIAMOND
SHIFTED WEST I-90 EXIT 406 INTERCHANGE
• Similar to Standard
Diamond
• Maintain traffic via
existing bridge
I-90 Exit 406 IMJR and EA
STANDARD DIAMOND W/
ROUNDABOUTS SHIFTED WEST I-90 EXIT 406 INTERCHANGE
• Roundabout intersections
• Dual NB to WB lanes
• Free EB to SB right-turn
• Maintain traffic via
existing bridge
I-90 Exit 406 IMJR and EA
DIVERGING DIAMOND I-90 EXIT 406 INTERCHANGE
• Similar to Standard
Diamond
• Free NB to WB left-turn
• Free EB to SB left-turn
• Maintenance of traffic on existing bridge or temporary bridge
I-90 Exit 406 IMJR and EA
5-LANE UNDIVIDED SD 11/SPLITROCK BLVD CORRIDOR
• Full access intersections
• Proposed access
modifications
• Sidewalk & bicycle
accommodations on both
sides
I-90 Exit 406 IMJR and EA
4-LANE DIVIDED SD 11/SPLITROCK BLVD CORRIDOR
• TBD
• TBD
• ¾ access intersections
• Raised median
• Similar sidewalk & bicycle accommodations as 5-lane
• 9th Avenue and Redwood Blvd
I-90 Exit 406 IMJR and EA
BACKAGE ROADS SD 11/SPLITROCK BLVD CORRIDOR
• Provide business access
via Express Avenue
• Varying levels of
reconstruction
I-90 Exit 406 IMJR and EA
NORTH OF I-90 SD 11/SPLITROCK BLVD CORRIDOR
• Retain existing corridor
• Access modifications
• Potential shared-use path
• Hemlock Blvd intersection
I-90 Exit 406 IMJR and EA
HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR
• Ease truck turn
• No conflicts avoided in
NB direction
I-90 Exit 406 IMJR and EA
HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR
• Widened to the west
• No conflict with NB
thru traffic
• Property impact
I-90 Exit 406 IMJR and EA
HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR
• No conflict with NB
thru traffic
I-90 Exit 406 IMJR and EA
HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR
• No conflict with NB
thru or left-turn traffic
I-90 Exit 406 IMJR and EA
HEMLOCK INTERSECTION SD 11/SPLITROCK BLVD CORRIDOR
Traffic control/warning
alternative, examples
include:
• Intersection conflict
warning system
• Signalized control
I-90 Exit 406 IMJR and EA
TODAY’S INVOLVEMENT OPPORTUNITIES
No preferred alternative has
been selected yet…
• Please provide feedback on
the developed alternatives
• Will help in further
refinement and screening
Comments
• Leave comment form at entryway
• Mail/email comment form to project contact
• Discuss with project representatives
• Submit comment via project website
• Due by February 6
I-90 Exit 406 IMJR and EA
THANK YOU!
Project Website
www.sehinc.com/online/406
Next Public Meeting:
Spring/Summer 2017
Project Contacts
Jon Wiegand, PE, PTOE
Consultant Project
Manager
HR Green, Inc.
605-221-2656
Steve Gramm, PE
SDDOT Project Manager
South Dakota Department of
Transportation
605-773-6641