Idaho Will Close Interstate 84 on October 15
The Idaho Transportation Department will shut down I-84 between Garrity and Ten Mile interchanges for construction.
Updated on Oct. 10, 2026 in Openings & Closings
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The Idaho Transportation Department will close all lanes of Interstate 84 between the Garrity and Ten Mile interchanges on October 15, 2026. This closure is scheduled to occur overnight as crews install bridge decks on the new State Highway 16 flyover ramps.
Why it matters
The closure is required to safely place bridge decks over the active interstate for the new State Highway 16 flyover project. This essential infrastructure work necessitates temporary traffic diversions to ensure worker and public safety during the construction process.
The nightly closure will take place from 10 p.m. to 5 a.m. Traffic will be diverted to Franklin Road during these hours as crews work on the State Highway 16 flyover.
The players
Idaho Transportation Department
This state agency is responsible for the planning, design, construction, and maintenance of Idaho's transportation infrastructure.
The details
Crews will use the nighttime closure to place bridge decks on the new State Highway 16 flyover ramps that pass above the interstate. Drivers should plan for additional travel time as traffic is rerouted to Franklin Road for the duration of the work.
Timeline
The I-84 closure is scheduled for October 15, 2026.
Work will take place overnight from 10 p.m. to 5 a.m.
Nighttime closures and lane restrictions will continue through the fall.
Market Landscape
The project reflects the broader regional effort to expand highway capacity and improve transit flow across the Treasure Valley. This closure follows the construction timeline set by the State Highway 16 extension project.
Commuters should expect delays during the overnight hours and adjust their travel to use Franklin Road as an alternative route. Residents should anticipate ongoing nighttime lane restrictions in the area throughout the fall.
The takeaway
Drivers navigating the Nampa area should prepare for overnight detours and potential traffic congestion near the Garrity and Ten Mile interchanges. Check local transit alerts periodically throughout the fall to stay updated on ongoing construction-related restrictions.
Further reading
Learn more about local infrastructure projects in the Nampa Openings & Closings section.
More information
View full details regarding the construction schedule on the Idaho Transportation Department project information portal.
Live Poll
Do frequent nighttime road construction closures significantly disrupt your travel or local commute?
