Intermittent I-84 lane closures
Expect intermittent I-84 lane closures through late November 2027. Continue reading for details.
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I-84 paving
Crews have finished paving I-84 near the Twin Falls Interchange (Exit 173). The I-84 South Jerome to Twin Falls Widening project is on track to be completed in fall 2026.
What to expect during construction
- Intermittent lane closures will occur on I-84 during the daytime and nighttime.
- Traffic shifts and lane changes will occur.
- The speed limit on I-84 is reduced.
- Ramp changes will occur at exits 168 and 173.
Improvements include
- Widening I-84 to three lanes in each direction.
- Replacing the roadway with a new concrete surface.
- Reconstructing the 400 South Road bridges.
Leading Idaho
This project is being funded with Transportation Expansion and Congestion Mitigation (TECM) funds as a part of the Leading Idaho TECM Program. The program allows ITD to accelerate project timelines to address rapid growth and build critical infrastructure today that would otherwise take many years to fund and build.
I-84 South Jerome Interchange
ITD is also working on the I-84 South Jerome Interchange (Exit 168) in Jerome. View the project website.
Stay in touch!
To sign up for construction updates:
- Sign up for email updates
- Sign up for text updates or text 84JTF to 1-866-483-8422 to sign up for texts
To contact the project team:
- Call (208) 391-3735
- Email info@jerometotwin.org
Frequently Asked Questions
ITD repaved I-84 between Exit 168 and Exit 173 in 2019 and 2020. This work was to rebuild and strengthen existing pavement. The repaving of I-84 was part of regularly scheduled maintenance work on I-84.
Construction began in April 2023 and is anticipated to be completed in fall 2026.
The bridges need to be replaced to accommodate the additional lanes on I-84. The bridges will also be raised to provide more vertical clearance for vehicles on E 400 South Road.
ITD will be utilizing as much of the new pavement as possible in the expansion of I-84.
Improvements to interchanges will not be included in this project. Improvements being made to the South Jerome Interchange are part of a separate project. Plans for the two projects will be coordinated.
Project Photos
I-84 over E 400 S Road in Jerome in 2026
I-84 near the Twin Falls Interchange in 2026
I-84 near the Twin Falls Interchange in 2026
I-84 over E 400 S Road in Jerome in 2025
I-84 near the South Jerome Interchange in 2024
I-84 near the Twin Falls Interchange in 2024
I-84 over E 400 S Road in Jerome in 2022
I-84 near the South Jerome Interchange in 2022
I-84 near the Twin Falls Interchange in 2022