Overview
This study will evaluate future needs and potential improvements on Interstate 84 between State Highway 44 (Exit 25) and Centennial Way (Exit 27) interchanges. This project is part of ITD’s ongoing efforts to improve I-84 in Canyon County.
You're invited!
In-person Open House Details:
- Wednesday, February 18, 2026
- 4:30 – 6:30 P.M. (drop in anytime)
- Middleton Trolley Station (310 Cornell Street, Middleton)
Online: Join our online meeting here.
What this study includes
This study began in 2023. It includes:
- Completing a traffic and safety study
- Completing an environmental evaluation
- Meeting with stakeholders and gathering input
- Prioritizing needed improvements
Improvements being considered
This study will look at several improvements including:
- Widening I-84 and replacing irrigation structures.
- Replacing the US-20/26 Interchange.
- Replacing two ramps at the Centennial Way Interchange.
- Replacing and widening the Boise River Bridge near Centennial Way.
- Replacing the SH-44 Interchange.
Next steps
ITD will receive environmental approval for the I-84, SH-44 to Centennial Way project in 2026. Right now, there is no funding to design or build the planned widening of I-84 between SH-44 and Centennial Way.
However, ITD does have funding to design improvements for the SH-44 Interchange. Design started in 2025 and is expected to be complete in 2026.
Join ITD at our public meeting to see the latest SH-44 Interchange proposed improvements on Wednesday, February 18. If you can’t attend in person, check back on February 18 to join us online.
Community involvement
ITD hosted a public open house in January 2024. Click here to watch a video to find out what we heard from you about the suggested improvements.
If you would like to hear more about the project, join us at the Middleton Trolley Station on February 18, 2026.
Timeline
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2023
Began an environmental evaluation for I-84 between SH-44 and Centennial Way.
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2024
Hosted a public meeting and proceeded with environmental evaluation.
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2025
Began design plans for the SH-44 Interchange (exit 25).
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February 2026
Host the second public meeting and share next steps.
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2026
Complete the environmental evaluation.
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Summer 2027
Finalize design and construction plans for the SH-44 interchange.
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Future
Begin construction on the SH-44 Interchange when funding is available.
Contact the project team
If you have questions or comments about this project, please contact the project team at 84corridor@itd.idaho.gov or call 208-334-8002. You can also text 84CORRIDOR to 1-866-483-8422 for updates.