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I-90 Exit 59 (N. LaCrosse Street) Interchange Reconstruction – Online Meeting



    Virtual Construction Information Meeting

    Welcome to the I-90 Exit 59 (N. LaCrosse Street) Interchange Improvements Project virtual Construction Information Meeting

    Due to limitations on public gatherings recommended by the Centers for Disease Control, the SDDOT is hosting this meeting virtually, in lieu of presenting information at an in person construction information meeting.

    The South Dakota Department of Transportation (SDDOT) in coordination with the City of Rapid City are constructing improvements at the I-90 Exit 59 (N. LaCrosse Street) Interchange and on I-90 between Exit 58 (N. Haines Avenue) and Exit 59 (N. LaCrosse Street). This virtual construction information meeting is intended to provide information regarding the project, including information on construction sequencing and initial planned street/lane closures and detours for the first phases of construction. The project has been planned, designed, a contractor has been awarded the construction contract, and now it is time for construction to begin!

    Thank you for your participation in the online meeting!

    How to Navigate the Online Meeting Page

    • Scroll down to view the items on each section of the meeting. Click on the arrows on the right of your screen to advance forward to the next section or left to return to a previous section. You may also use the navigation bar on the left side of the screen to revisit any part of the meeting. You can view presentation videos by clicking on the play button and view links and maps by clicking directly on the respective item.

    Presentation Overview Video

    Project Map

    a map highlighting us I-90 road intersecting with nort lacrosse street

    Project Background and DDI Information

    Project Background

    The I-90 Exit 59 (N. LaCrosse Street) Interchange project will construct the first Diverging Diamond Interchange (DDI) in South Dakota! Please view the short video to the right to learn more about the project team, what the project entails, and DDI’s. Then use the meeting links to learn even more about DDIs!


    DDI Animation


    Presentation Video 2

    Construction Sequencing and Detours

    Construction is Starting

    The project is scheduled to get underway in February of 2021. To learn more about the project schedule, traffic sequencing, and initial detours, please view the short video to the right. You may also view the different roject sequencing and detour information figures.

    Detour & Construction Phasing Exhibits

    1. I-90 Auxilary Lanes and Exit 59 Ramp Work
    2. Detour EB I90 On Ramp at Haines
    3. Detour N Maple Ave Closed
    4. Detour EB and WB I90 On Ramps at Lacrosse
    5. LaCrosse Utility Work Lane Closures
    6. DDI Phasing Plan 2022
    7. DDI Phase 1
    8. DDI Phase 2
    9. DDI Phase 3A
    10. DDI Phase 3Bs
    11. Detour Lacrosse St Overpass

    Presentation Video 3

    Conclusion & Opportunity for Questions

    Thank You!

    Thank you for your interest in the I-90 Exit 59 (N. LaCrosse Street) interchange project! Please view the short conclusion video and learn how you can ask questions and sign up for construction updates!

    Presentation Video 4

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